阅读说明：本技术 一种量子灰岩板及其制备方法 (Quantum limestone plate and preparation method thereof ) 是由 石明文 黄大泱 卢佩玉 王礼 于 2021-11-09 设计创作，主要内容包括：本发明涉及岩板技术领域,本发明具体公开了一种量子灰岩板及其制备方法,由以下重量份原料制备而成：20～30份锂辉石、15～25份伊利石、8～15份氧化锆、6～12份高岭土、6～10份烧结助剂、6～10份改性白刚玉粉、4～8份磷酸钙、2～6份氧化钙、1～4份氧化镁、1～3份氧化锶、0.8～2份碳酸锂、0.2～0.6份锗石粉。在本发明的配方体系下,不需要加入着色剂、颜料以及过渡金属元素,通过在烧结助剂的作用下,将所述的原料经过混合,压制,烧结后,随后在氨气气氛下进行还原烧结,能够得到具有量子灰外观的岩板,具有广泛的市场前景,且本发明所述的量子灰岩板具有良好的耐磨性能。(The invention relates to the technical field of rock plates, and particularly discloses a quantum gray rock plate and a preparation method thereof, wherein the quantum gray rock plate is prepared from the following raw materials in parts by weight: 20-30 parts of spodumene, 15-25 parts of illite, 8-15 parts of zirconia, 6-12 parts of kaolin, 6-10 parts of sintering aid, 6-10 parts of modified white corundum powder, 4-8 parts of calcium phosphate, 2-6 parts of calcium oxide, 1-4 parts of magnesium oxide, 1-3 parts of strontium oxide, 0.8-2 parts of lithium carbonate and 0.2-0.6 part of germanite powder. Under the formula system of the invention, colorant, pigment and transition metal element are not required to be added, and the raw materials are mixed, pressed and sintered under the action of a sintering aid, and then are subjected to reduction sintering in an ammonia atmosphere, so that the rock plate with the quantum ash appearance can be obtained, and the rock plate has wide market prospect and good wear resistance.)

1. The quantum limestone plate is characterized by being prepared from the following raw materials in parts by weight: 20-30 parts of spodumene, 15-25 parts of illite, 8-15 parts of zirconia, 6-12 parts of kaolin, 6-10 parts of sintering aid, 6-10 parts of modified white corundum powder, 4-8 parts of calcium phosphate, 2-6 parts of calcium oxide, 1-4 parts of magnesium oxide, 1-3 parts of strontium oxide, 0.8-2 parts of lithium carbonate and 0.2-0.6 part of germanite powder.

2. The quantum limestone plate of claim 1, wherein the quantum limestone plate is prepared from the following raw materials in parts by weight: 20-28 parts of spodumene, 15-22 parts of illite, 10-15 parts of zirconia, 8-12 parts of kaolin, 7-10 parts of sintering aid, 6-9 parts of modified white corundum powder, 4-7 parts of calcium phosphate, 2-5 parts of calcium oxide, 1-3 parts of magnesium oxide, 1-2 parts of strontium oxide, 0.8-1.5 parts of lithium carbonate and 0.3-0.6 part of germanite powder.

3. The quantum limestone plate of claim 1, wherein the quantum limestone plate is prepared from the following raw materials in parts by weight: 25 parts of spodumene, 20 parts of illite, 14 parts of zirconia, 10 parts of kaolin, 9 parts of sintering aid, 8 parts of modified white corundum powder, 5 parts of calcium phosphate, 3 parts of calcium oxide, 2 parts of magnesium oxide, 1.5 parts of strontium oxide, 1 part of lithium carbonate and 0.5 part of germanite powder.

4. The quantum limestone plate of claim 1, wherein the preparation method of the modified white corundum powder is as follows:

s1, adding 10 parts by weight of white corundum powder into 20-50 parts by weight of first modification liquid, uniformly dispersing, and drying to obtain pretreated white corundum powder;

s2, adding 10 parts by weight of pretreated white corundum powder, 0.5-2 parts by weight of boric acid and 0.5-2 parts by weight of zinc oxide into 20-50 parts by weight of second modification liquid, stirring at the rotating speed of 200-500 rpm for 2-8 hours at the temperature of 55-80 ℃, filtering and drying to obtain secondary treated white corundum powder;

and S3, roasting the secondarily-treated white corundum powder at 300-600 ℃ for 2-6 h, and cooling to obtain the modified white corundum powder.

5. The quantum limestone plate of claim 4, wherein the first modification liquid is prepared by a method comprising: adding 0.8-2 parts by weight of tartaric acid and 0.8-2 parts by weight of citric acid into 10-20 parts by weight of absolute ethyl alcohol, uniformly dispersing, adding 0.1-0.4 part by weight of N-2-aminoethyl-3-aminopropyltrimethoxysilane, and uniformly stirring to obtain a first modification solution.

6. The quantum limestone plate of claim 4, wherein the second modification liquid is prepared by the following method: adding 1-3 parts by weight of trimethyl phosphate and 0.2-0.5 part by weight of tetra-n-propyl zirconate into 10-20 parts by weight of absolute ethyl alcohol, and uniformly dispersing to obtain a second modified solution.

7. The quantum limestone plate of claim 1, wherein the sintering aid is prepared from tin phosphate, ammonium fluoride, niobium pentoxide in a weight ratio of 1: 0.2-1: 0.2 to 0.8.

8. The quantum limestone plate of claim 1, wherein the sintering aid is prepared from tin phosphate, ammonium fluoride, niobium pentoxide in a weight ratio of 1: 0.3-0.8: 0.2 to 0.6.

9. The quantum limestone plate of claim 1, wherein the sintering aid is prepared from tin phosphate, ammonium fluoride, niobium pentoxide in a weight ratio of 1: 0.6: 0.4.

10. A method for preparing a quantum limestone plate, which is used for preparing the quantum limestone plate as claimed in any one of claims 1 to 9, and comprises the following steps:

(1) adding spodumene, illite, zirconia, kaolin, a sintering aid, modified white corundum powder, calcium phosphate, calcium oxide, magnesium oxide, strontium oxide, lithium carbonate and germanite powder into a ball mill, performing wet ball milling, uniformly mixing, sieving by a 100-300-mesh sieve, and drying to obtain a mixture;

(2) pressing the mixture into a mold by using a forming machine under the pressure of 70-85 MPa to obtain a dry blank;

(3) and heating the dry blank to 1350-1420 ℃ at the speed of 8-15 ℃/min, preserving heat for 30-120 min, heating to 1520-1580 ℃ at the speed of 8-15 ℃/min in the atmosphere of ammonia gas, preserving heat for 30-120 min, cooling to normal temperature, and grinding to obtain the quantum gray rock plate.

Technical Field

The invention relates to the technical field of rock plates, in particular to a quantum gray rock plate and a preparation method thereof.

Background

The rock plate is close to the ceramic tile in composition and is mainly formed by sintering minerals and inorganic oxides. With the development of society and the improvement of living standard of people, people have new requirements on the color of rock plates.

CN107739197A discloses a gray ceramic tile, which comprises a base material and a coloring material, wherein the coloring material is silicon-aluminum alloy powder, and the color of the ceramic tile can be gradually adjusted from light ash to dark ash by changing the proportion of silicon and aluminum in the silicon-aluminum alloy, so that a ceramic tile blank from light ash to dark ash is formed. Although the method can realize gradual change adjustment of the color of the ceramic tile from light grey to dark grey, the used colorant is easy to decompose and volatilize at high temperature to cause uneven color distribution of the ceramic tile, and the method does not give specific parameters in the aspect of wear resistance.

CN102659401A discloses a method for making gray zirconia ceramics, which specifically comprises: step 1, providing white zirconia ceramics; step 2, placing the white zirconia ceramic in a vacuum graphite furnace for high-temperature firing to generate black zirconia ceramic; and 3, placing the black zirconia ceramic in a sintering furnace for oxidizing and sintering to obtain the grey-white zirconia ceramic. It is obtained by placing a black zirconia ceramic in a sintering furnace for oxidation sintering, but it does not disclose parameters in terms of wear resistance of the resulting off-white zirconia ceramic.

Disclosure of Invention

The invention provides a quantum gray rock plate and a preparation method thereof.

The invention adopts the following technical scheme for solving the technical problems:

the quantum limestone plate is prepared from the following raw materials in parts by weight: 20-30 parts of spodumene, 15-25 parts of illite, 8-15 parts of zirconia, 6-12 parts of kaolin, 6-10 parts of sintering aid, 6-10 parts of modified white corundum powder, 4-8 parts of calcium phosphate, 2-6 parts of calcium oxide, 1-4 parts of magnesium oxide, 1-3 parts of strontium oxide, 0.8-2 parts of lithium carbonate and 0.2-0.6 part of germanite powder.

The inventor of the invention finds that under the formula system of the invention, colorant, pigment and transition metal element are not required to be added, and the rock plate with the quantum ash appearance can be obtained by mixing, pressing and sintering the raw materials under the action of a sintering aid and then carrying out reduction sintering in an ammonia atmosphere, so that the rock plate has wide market prospect.

As a preferable scheme, the quantum limestone plate is prepared from the following raw materials in parts by weight: 20-28 parts of spodumene, 15-22 parts of illite, 10-15 parts of zirconia, 8-12 parts of kaolin, 7-10 parts of sintering aid, 6-9 parts of modified white corundum powder, 4-7 parts of calcium phosphate, 2-5 parts of calcium oxide, 1-3 parts of magnesium oxide, 1-2 parts of strontium oxide, 0.8-1.5 parts of lithium carbonate and 0.3-0.6 part of germanite powder.

As a preferable scheme, the quantum limestone plate is prepared from the following raw materials in parts by weight: 25 parts of spodumene, 20 parts of illite, 14 parts of zirconia, 10 parts of kaolin, 9 parts of sintering aid, 8 parts of modified white corundum powder, 5 parts of calcium phosphate, 3 parts of calcium oxide, 2 parts of magnesium oxide, 1.5 parts of strontium oxide, 1 part of lithium carbonate and 0.5 part of germanite powder.

As a preferred scheme, the preparation method of the modified white corundum powder comprises the following steps:

s1, adding 10 parts by weight of white corundum powder into 20-50 parts by weight of first modification liquid, uniformly dispersing, and drying to obtain pretreated white corundum powder;

s2, adding 10 parts by weight of pretreated white corundum powder, 0.5-2 parts by weight of boric acid and 0.5-2 parts by weight of zinc oxide into 20-50 parts by weight of second modification liquid, stirring at the rotating speed of 200-500 rpm for 2-8 hours at the temperature of 55-80 ℃, filtering and drying to obtain secondary treated white corundum powder;

and S3, roasting the secondarily-treated white corundum powder at 300-600 ℃ for 2-6 h, and cooling to obtain the modified white corundum powder.

As a preferable scheme, the preparation method of the first modification solution comprises the following steps: adding 0.8-2 parts by weight of tartaric acid and 0.8-2 parts by weight of citric acid into 10-20 parts by weight of absolute ethyl alcohol, uniformly dispersing, adding 0.1-0.4 part by weight of N-2-aminoethyl-3-aminopropyltrimethoxysilane, and uniformly stirring to obtain a first modification solution.

Although the quantum limestone plate has good quantum ash appearance, the wear resistance of the quantum limestone plate is still to be improved.

The inventor finds that if zirconium oxide is treated, namely, zirconium oxide is modified to improve the wear resistance, and calcium oxide is modified to improve the wear resistance but cannot ensure the color of the appearance, so that the inventor carries out modification treatment on white alundum powder on the premise of ensuring the color of the quantum gray of the appearance, thereby obtaining the quantum gray rock plate with the quantum gray appearance and excellent wear resistance.

According to the invention, the first modification liquid and the second modification liquid are prepared, and the white corundum powder is treated by the first modification liquid and the second modification liquid in sequence and then roasted to obtain the white corundum powder capable of obviously improving the wear resistance.

The inventor finds that the wear-resisting property of the modified white corundum powder can be remarkably improved compared with other modification methods on the premise of ensuring the appearance of the quantum ash.

As a preferable scheme, the preparation method of the second modification solution comprises the following steps: adding 1-3 parts by weight of trimethyl phosphate and 0.2-0.5 part by weight of tetra-n-propyl zirconate into 10-20 parts by weight of absolute ethyl alcohol, and uniformly dispersing to obtain a second modified solution.

Preferably, the sintering aid is prepared from tin phosphate, ammonium fluoride and niobium pentoxide in a weight ratio of 1: 0.2-1: 0.2 to 0.8.

By adopting the sintering aid consisting of tin phosphate, ammonium fluoride and niobium pentoxide, the influence of high-temperature sintering on the performance of the rock plate during reduction sintering in an ammonia atmosphere can be effectively avoided.

Preferably, the sintering aid is prepared from tin phosphate, ammonium fluoride and niobium pentoxide in a weight ratio of 1: 0.3-0.8: 0.2 to 0.6.

Preferably, the sintering aid is prepared from tin phosphate, ammonium fluoride and niobium pentoxide in a weight ratio of 1: 0.6: 0.4.

The invention also provides a preparation method of the quantum limestone plate, which is used for preparing the quantum limestone plate and comprises the following steps:

(1) adding spodumene, illite, zirconia, kaolin, a sintering aid, modified white corundum powder, calcium phosphate, calcium oxide, magnesium oxide, strontium oxide, lithium carbonate and germanite powder into a ball mill, performing wet ball milling, uniformly mixing, sieving by a 100-300-mesh sieve, and drying to obtain a mixture;

(2) pressing the mixture into a mold by using a forming machine under the pressure of 70-85 MPa to obtain a dry blank;

(3) and heating the dry blank to 1350-1420 ℃ at the speed of 8-15 ℃/min, preserving heat for 30-120 min, heating to 1520-1580 ℃ at the speed of 8-15 ℃/min in the atmosphere of ammonia gas, preserving heat for 30-120 min, cooling to normal temperature, and grinding to obtain the quantum gray rock plate.

The invention has the beneficial effects that: under the formula system of the invention, colorant, pigment and transition metal element are not required to be added, and the raw materials are mixed, pressed and sintered under the action of a sintering aid, and then are subjected to reduction sintering in an ammonia atmosphere, so that the rock plate with the quantum ash appearance can be obtained, and the rock plate has wide market prospect and good wear resistance.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, the parts are all parts by weight unless otherwise specified.

Example 1

The quantum limestone plate is prepared from the following raw materials in parts by weight: 25 parts of spodumene, 20 parts of illite, 14 parts of zirconia, 10 parts of kaolin, 9 parts of sintering aid, 8 parts of modified white corundum powder, 5 parts of calcium phosphate, 3 parts of calcium oxide, 2 parts of magnesium oxide, 1.5 parts of strontium oxide, 1 part of lithium carbonate and 0.5 part of germanite powder.

Under the formula system of the invention, colorant, pigment and transition metal element are not required to be added, and the rock plate with the quantum ash appearance can be obtained by mixing, pressing and sintering the raw materials under the action of the sintering aid and then carrying out reduction sintering in the ammonia atmosphere.

The sintering aid is prepared from tin phosphate, ammonium fluoride and niobium pentoxide in a weight ratio of 1: 0.6: 0.4.

By adopting the sintering aid consisting of tin phosphate, ammonium fluoride and niobium pentoxide, the influence of high-temperature sintering on the performance of the rock plate during reduction sintering in an ammonia atmosphere can be effectively avoided.

The preparation method of the modified white corundum powder comprises the following steps:

s1, adding 1 part by weight of tartaric acid and 1 part by weight of citric acid into 18 parts by weight of absolute ethyl alcohol, uniformly dispersing, adding 0.2 part by weight of N-2-aminoethyl-3-aminopropyltrimethoxysilane, uniformly stirring to obtain a first modified solution, adding 10 parts by weight of white corundum powder into 40 parts by weight of the first modified solution, uniformly dispersing, and drying to obtain pretreated white corundum powder;

s2, adding 1.8 parts by weight of trimethyl phosphate and 0.4 part by weight of tetra-n-propyl zirconate into 17.8 parts by weight of absolute ethyl alcohol, uniformly dispersing to obtain a second modified solution, adding 10 parts by weight of pretreated white corundum powder, 1.5 parts by weight of boric acid and 1.2 parts by weight of zinc oxide into 37.3 parts by weight of the second modified solution, stirring at the rotating speed of 300rpm for 5 hours at 70 ℃, filtering and drying to obtain secondary treated white corundum powder;

and S3, roasting the secondary-treated white corundum powder at 500 ℃ for 4 hours, and cooling to obtain the modified white corundum powder.

The white corundum powder is treated by the first modification liquid and the second modification liquid in sequence and then roasted to obtain the white corundum powder capable of obviously improving the wear resistance.

The preparation method of the quantum limestone plate comprises the following steps:

(1) adding spodumene, illite, zirconia, kaolin, a sintering aid, modified white corundum powder, calcium phosphate, calcium oxide, magnesium oxide, strontium oxide, lithium carbonate and germanite powder into a ball mill, performing wet ball milling, uniformly mixing, sieving with a 200-mesh sieve, and drying to obtain a mixture;

(2) pressing the mixture into a mold by a forming machine under 78MPa to obtain a dry blank;

(3) heating the dry blank to 1380 ℃ at 10 ℃/min, preserving heat for 90min, heating to 1560 ℃ at 12 ℃/min in the atmosphere of ammonia gas, preserving heat for 60min, cooling to normal temperature, and grinding to obtain the quantum limestone plate.

Example 2

The quantum limestone plate is prepared from the following raw materials in parts by weight: 24.4 parts of spodumene, 22 parts of illite, 15 parts of zirconia, 6 parts of kaolin, 8 parts of sintering aid, 6 parts of modified white corundum powder, 8 parts of calcium phosphate, 2 parts of calcium oxide, 4 parts of magnesium oxide, 2 parts of strontium oxide, 2 parts of lithium carbonate and 0.6 part of germanite powder.

The sintering aid is prepared from tin phosphate, ammonium fluoride and niobium pentoxide in a weight ratio of 1: 0.5: 0.5.

The preparation method of the modified white corundum powder comprises the following steps:

s1, adding 1.5 parts by weight of tartaric acid and 1.5 parts by weight of citric acid into 16.7 parts by weight of absolute ethyl alcohol, uniformly dispersing, adding 0.3 part by weight of N-2-aminoethyl-3-aminopropyltrimethoxysilane, uniformly stirring to obtain a first modified solution, adding 10 parts by weight of white corundum powder into 40 parts by weight of the first modified solution, uniformly dispersing, and drying to obtain pretreated white corundum powder;

s2, adding 1.5 parts by weight of trimethyl phosphate and 0.4 part by weight of tetra-n-propyl zirconate into 18.1 parts by weight of absolute ethyl alcohol, uniformly dispersing to obtain a second modified solution, adding 10 parts by weight of pretreated white corundum powder, 1.2 parts by weight of boric acid and 0.8 part by weight of zinc oxide into 38 parts by weight of the second modified solution, stirring at the rotating speed of 400rpm at the temperature of 65 ℃ for 5 hours, filtering and drying to obtain secondary treated white corundum powder;

and S3, roasting the secondary-treated white corundum powder at 450 ℃ for 4 hours, and cooling to obtain the modified white corundum powder.

The preparation method of the quantum limestone plate comprises the following steps:

(1) adding spodumene, illite, zirconia, kaolin, a sintering aid, modified white corundum powder, calcium phosphate, calcium oxide, magnesium oxide, strontium oxide, lithium carbonate and germanite powder into a ball mill, performing wet ball milling, uniformly mixing, sieving with a 200-mesh sieve, and drying to obtain a mixture;

(2) pressing the mixture into a mold by a forming machine under the pressure of 80MPa to obtain a dry blank;

(3) and heating the dry blank to 1400 ℃ at a speed of 10 ℃/min, preserving heat for 60min, heating to 1550 ℃ at a speed of 10 ℃/min under the atmosphere of ammonia gas, preserving heat for 60min, cooling to normal temperature, and grinding to obtain the quantum limestone plate.

Example 3

The quantum limestone plate is prepared from the following raw materials in parts by weight: 26 parts of spodumene, 25 parts of illite, 8 parts of zirconia, 12 parts of kaolin, 6 parts of sintering aid, 8 parts of modified white corundum powder, 4 parts of calcium phosphate, 6 parts of calcium oxide, 1 part of magnesium oxide, 3 parts of strontium oxide, 0.8 part of lithium carbonate and 0.2 part of germanite powder.

The sintering aid is prepared from tin phosphate, ammonium fluoride and niobium pentoxide in a weight ratio of 1: 0.4: 0.6.

The preparation method of the modified white corundum powder comprises the following steps:

s1, adding 1.8 parts by weight of tartaric acid and 1.2 parts by weight of citric acid into 16.75 parts by weight of absolute ethyl alcohol, uniformly dispersing, adding 0.25 part by weight of N-2-aminoethyl-3-aminopropyltrimethoxysilane, uniformly stirring to obtain a first modified solution, adding 10 parts by weight of white corundum powder into 40 parts by weight of the first modified solution, uniformly dispersing, and drying to obtain pretreated white corundum powder;

s2, adding 1.7 parts by weight of trimethyl phosphate and 0.3 part by weight of tetra-n-propyl zirconate into 17 parts by weight of absolute ethyl alcohol, uniformly dispersing to obtain a second modified solution, adding 10 parts by weight of pretreated white corundum powder, 1.5 parts by weight of boric acid and 1.2 parts by weight of zinc oxide into 37.3 parts by weight of the second modified solution, stirring at the rotation speed of 400rpm at 75 ℃ for 5 hours, filtering and drying to obtain secondary treated white corundum powder;

and S3, roasting the secondary-treated white corundum powder at 480 ℃ for 3.5 hours, and cooling to obtain the modified white corundum powder.

The preparation method of the quantum limestone plate comprises the following steps:

(1) adding spodumene, illite, zirconia, kaolin, a sintering aid, modified white corundum powder, calcium phosphate, calcium oxide, magnesium oxide, strontium oxide, lithium carbonate and germanite powder into a ball mill, performing wet ball milling, uniformly mixing, sieving with a 200-mesh sieve, and drying to obtain a mixture;

(2) pressing the mixture into a mold by a forming machine under the pressure of 80MPa to obtain a dry blank;

(3) and heating the dry blank to 1400 ℃ at the speed of 10 ℃/min, preserving heat for 80min, heating to 1560 ℃ at the speed of 10 ℃/min in the atmosphere of ammonia gas, preserving heat for 60min, cooling to normal temperature, and grinding to obtain the quantum limestone plate.

Comparative example 1

Comparative example 1 differs from example 1 in that comparative example 1 does not contain the sintering aid, and the other things are the same.

Comparative example 2

Comparative example 2 differs from example 1 in that comparative example 2 uses titanium dioxide as the sintering aid instead of the sintering aid described in example 1, all else being equal.

Comparative example 3

Comparative example 3 differs from example 1 in that comparative example 3 does not contain the modified white corundum powder, and the other things are the same.

Comparative example 4

Comparative example 4 is different from example 1 in that comparative example 4 uses white corundum powder instead of modified white corundum powder, and the others are the same.

Comparative example 5

Comparative example 5 is different from example 1 in that the method for preparing the modified white corundum powder described in comparative example 5 is different from example 1, and the present comparative example does not use the second modifying solution treatment described in example 1, but is otherwise the same.

The preparation method of the modified white corundum powder comprises the following steps:

s1, adding 1 part by weight of tartaric acid and 1 part by weight of citric acid into 18 parts by weight of absolute ethyl alcohol, uniformly dispersing, adding 0.2 part by weight of N-2-aminoethyl-3-aminopropyltrimethoxysilane, uniformly stirring to obtain a modified solution, adding 10 parts by weight of white corundum powder into 40 parts by weight of the modified solution, uniformly dispersing, and drying to obtain pretreated white corundum powder;

s2, roasting the pretreated white corundum powder at 500 ℃ for 4 hours, and cooling to obtain the modified white corundum powder.

Comparative example 6

Comparative example 6 is different from example 1 in that the modified white corundum powder of comparative example 6 was prepared by a method different from that of example 1, and the present comparative example was not treated with the first modifying solution of example 1, but was otherwise the same.

The preparation method of the modified white corundum powder comprises the following steps:

s1, adding 1.8 parts by weight of trimethyl phosphate and 0.4 part by weight of tetra-n-propyl zirconate into 17.8 parts by weight of absolute ethyl alcohol, uniformly dispersing to obtain a modified solution, adding 10 parts by weight of white corundum powder, 1.5 parts by weight of boric acid and 1.2 parts by weight of zinc oxide into 37.3 parts by weight of the modified solution, stirring at the rotating speed of 300rpm for 5 hours at 70 ℃, filtering and drying to obtain pretreated white corundum powder;

s2, roasting the pretreated white corundum powder at 500 ℃ for 4 hours, and cooling to obtain the modified white corundum powder.

Comparative example 7 is different from example 1 in that the method for preparing the quantum limestone sheet described in comparative example 7 is different from example 1, and in this comparative example, sintering is not performed under ammonia gas, but all the other is the same.

The preparation method of the quantum limestone plate comprises the following steps:

(1) adding spodumene, illite, zirconia, kaolin, a sintering aid, modified white corundum powder, calcium phosphate, calcium oxide, magnesium oxide, strontium oxide, lithium carbonate and germanite powder into a ball mill, performing wet ball milling, uniformly mixing, sieving with a 200-mesh sieve, and drying to obtain a mixture;

(2) pressing the mixture into a mold by a forming machine under 78MPa to obtain a dry blank;

(3) and heating the dry blank to 1380 ℃ at the speed of 10 ℃/min, preserving the heat for 90min, cooling to normal temperature, and grinding to obtain the quantum limestone plate.

To further demonstrate the effect of the present invention, the following test methods were provided:

1. selecting 10 professionals (coating toning practitioners) of 20-30 years old, taking a quantum gray car of Audi 2021 Avant pioneer type 40 TFSI fashion dynamic version as a color reference to manufacture a color chart, comparing the colors of the quantum gray rock plates prepared in examples 1-3 and comparative examples 1, 2 and 7, scoring the colors, calculating average scores, wherein the scoring standards are shown in table 1, and the test results are shown in table 2.

TABLE 1 Scoring standards

TABLE 2 test results

As can be seen from tables 1 and 2, the quantum limestone plates according to the present invention exhibit quantum gray color.

In comparison with example 1, comparative example 2 and comparative example 7, it is shown that in the formula system of the present invention, the rock plate with the color of quantum ash can be manufactured only by adopting the sintering aid of the present invention and sintering under ammonia gas, and the color is greatly different by adopting other sintering aids.

2. The abrasion resistance is tested by using the test method in GB/T3810.7-2016 (determination of surface abrasion resistance of glazed brick), and the abrasion values of examples 1-3 and comparative examples 1-7 are tested at 6000 revolutions, and the test results are shown in Table 3.

TABLE 3 abrasion resistance test results

As can be seen from table 3, the quantum limestone plate according to the present invention has good wear resistance.

Compared with the comparative examples 1 and 1-2, the sintering aid disclosed by the invention can influence the wear resistance of the quantum limestone plate, and can remarkably improve the wear resistance compared with a common sintering aid.

Compared with the comparative examples 3 to 6, the modified white corundum powder disclosed by the invention has the advantages that the wear resistance can be obviously improved, the influence of the modified white corundum powder prepared by different modification methods of the white corundum powder on the wear resistance is different, and the wear resistance can be obviously improved by modifying the white corundum powder by adopting the modification method disclosed by the invention compared with other methods.

In light of the foregoing description of preferred embodiments according to the invention, it is clear that many changes and modifications can be made by the person skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.