阅读说明：本技术 一种高温烧结的电气石型负离子无釉陶瓷及其制备方法 (High-temperature sintered tourmaline type negative ion unglazed ceramic and preparation method thereof ) 是由 丁德芳 殷颖 沈毅 于 2021-10-25 设计创作，主要内容包括：本发明提供了一种高温烧结的电气石型负离子无釉陶瓷及其制备方法。通过引入蛭石粉、莫来石粉、硅灰石粉和氧化锆粉配料,保护电气石型负离子粉的晶体结构,使得在烧结温度为1000℃-1280℃条件下,电气石型负离子无釉陶瓷仍然能够有良好的负离子释放性能,是一种优质负离子材料,该负离子材料的空气负离子诱生量在300～600个/cm～(3)。本发明的制备方法,为高温烧结制备产品,产品稳定,耐候性好。且采用负离子材料与陶瓷坯料直接混合的模式,操作便捷,生产成本低廉,缩短生产周期,易于批量生产,而且该负离子材料经济、节能、持续、环保,可广泛应用于陶瓷产品的生产和加工。(The invention provides a high-temperature sintered tourmaline type negative ion unglazed ceramic and a preparation method thereof. The crystal structure of the tourmaline type negative ion powder is protected by introducing the ingredients of the vermiculite powder, the mullite powder, the wollastonite powder and the zirconia powder, so that the tourmaline type negative ion unglazed ceramic still has good negative ion release performance under the condition that the sintering temperature is 1000-1280 ℃, and is a high-quality negative ion material, and the air negative ion induction amount of the negative ion material is 300-600/cm 3 . The preparation method of the invention is a product prepared by high-temperature sintering, and the product is stable and has good weather resistance. And the mode of directly mixing the negative ion material and the ceramic blank is adopted, the operation is convenient, the production cost is low, the production period is shortened, the batch production is easy, and the negative ion material is economic, energy-saving, continuous and environment-friendly, and can be widely applied to the production and processing of ceramic products.)

1. The high-temperature sintered tourmaline type negative ion unglazed ceramic is characterized in that: the raw materials of the tourmaline type negative ion unglazed ceramic comprise tourmaline type negative ion powder mixed materials and unglazed ceramic blank dry powder.

2. The tourmaline-type negative ion unglazed ceramic sintered at high temperature according to claim 1, which comprises: the mass portion of the dry powder of the unglazed ceramic blank is 65-80 parts, and the mass portion of the tourmaline type negative ion powder mixed material is 15-35 parts.

3. The tourmaline-type negative ion unglazed ceramic sintered at high temperature according to claim 2, wherein: the tourmaline type negative ion powder mixed material comprises the following components in parts by mass: 60-75 parts of tourmaline type negative ion powder, 16-21 parts of vermiculite powder, 15-19 parts of wollastonite powder, 8-17 parts of zirconium oxide powder and 9-16 parts of mullite powder.

4. A method for preparing the tourmaline type negative ion unglazed ceramic sintered at high temperature according to any one of claims 1 to 3, which comprises: the method comprises the following steps:

s1, preparing tourmaline type negative ion mixed material:

respectively weighing tourmaline type negative ion powder, vermiculite powder, wollastonite powder, zirconium oxide powder and mullite powder according to certain mass parts, putting the powder into a ball mill, adding pure water, carrying out ball milling for 2-3 h, carrying out suction filtration, drying at 50-80 ℃ for 10-14 h, carrying out dry grinding, and sieving to obtain a tourmaline type negative ion mixed material;

s2, preparing dry powder of the unglazed ceramic blank:

drying the unglazed ceramic blank at 50-80 ℃ for 10-14 h, grinding by a dry method, and sieving to obtain dry powder of the unglazed ceramic blank;

s3, preparing a tourmaline type negative ion unglazed ceramic blank:

respectively weighing the tourmaline type negative ion powder mixture obtained in the step S1 and the dry powder of the unglazed ceramic blank obtained in the step S2 according to parts by weight, putting the mixture into a ball mill, adding pure water, carrying out ball milling for 1-2 h, carrying out suction filtration, carrying out vacuum pugging, forming and drying to obtain a tourmaline type negative ion unglazed ceramic blank;

s4, high-temperature sintering:

and (4) sintering the tourmaline type negative ion unglazed ceramic blank obtained in the step (S3) at a high temperature, wherein the temperature in the later sintering period is 1000-1280 ℃, and the heat preservation time in the later sintering period is 0.5-3 h, so as to obtain the tourmaline type negative ion unglazed ceramic.

5. The method for preparing tourmaline type negative ion unglazed ceramic sintered at high temperature according to claim 4, which comprises: in step S4, during the high-temperature sintering process, the temperature at the later stage of sintering is 1180 ℃ to 1280 ℃.

6. The method for preparing tourmaline type negative ion unglazed ceramic sintered at high temperature according to claim 4, which comprises: in step S1, the weight ratio of the powder, the pure water and the balls in the ball mill is 3:1: 1-1: 1: 1.

7. The method for preparing tourmaline type negative ion unglazed ceramic sintered at high temperature according to claim 5, which comprises: in step S1, the dry grinding particle size is 200-325 mesh.

8. The method for preparing tourmaline type negative ion unglazed ceramic sintered at high temperature according to claim 6, which comprises: in step S2, the dry grinding particle size is 200-325 mesh.

9. The method for preparing tourmaline type negative ion unglazed ceramic sintered at high temperature according to claim 7, wherein: in step S3, the weight ratio of the powder, the pure water and the balls in the ball mill is 3:1: 1-1: 1: 1.

10. The method for preparing tourmaline type negative ion unglazed ceramic according to claim 8, which is sintered at high temperature, comprising: in the step S3, the vacuum pugging time is 4-8 times.

Technical Field

The invention relates to the technical field of high-temperature materials, in particular to tourmaline type negative ion unglazed ceramic sintered at high temperature and a preparation method thereof.

Background

The negative ions have good efficacy in the field of air purification, and are pursued by people. Tourmaline, a natural mineral material capable of generating negative ions, is widely used as a negative ion functional material because it has a specific crystal structure capable of ionizing ambient air to release negative ions. However, the structure of tourmaline is melted at 900 deg.C, and the anion releasing ability is destroyed. In order to maintain the basic sintering degree of the ceramic body, the sintering temperature of the ceramic is often higher than the melting temperature of tourmaline, generally higher than 1000 ℃, so that the crystal structure of the tourmaline-type anion powder is damaged when the tourmaline-type anion powder is added into the ceramic. If the maximum sintering temperature is lower than the melting temperature of tourmaline, the ceramic body may be insufficiently sintered.

Disclosure of Invention

The invention aims to provide a high-temperature sintered tourmaline type negative ion unglazed ceramic and a preparation method thereof, aiming at the defects in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

the raw materials of the tourmaline type negative ion unglazed ceramic sintered at high temperature comprise a tourmaline type negative ion powder mixed material and unglazed ceramic blank dry powder.

Further, the mass portion of the dry powder of the unglazed ceramic blank is 65-80 parts, and the mass portion of the tourmaline type negative ion powder mixed material is 15-35 parts.

Further, the tourmaline type negative ion powder mixed material comprises the following components in parts by mass: 60-75 parts of tourmaline type negative ion powder, 16-21 parts of vermiculite powder, 15-19 parts of wollastonite powder, 8-17 parts of zirconium oxide powder and 9-16 parts of mullite powder.

The invention also provides a preparation method of the tourmaline type negative ion unglazed ceramic sintered at high temperature, which comprises the following steps:

step S1, preparing tourmaline type negative ion mixed material:

respectively weighing tourmaline type negative ion powder, vermiculite powder, wollastonite powder, zirconium oxide powder and mullite powder according to certain mass parts, putting the powder into a ball mill, adding pure water, carrying out ball milling for 2-3 h, carrying out suction filtration, drying at 50-80 ℃ for 10-14 h, carrying out dry grinding, and sieving to obtain a tourmaline type negative ion mixed material;

step S2, preparing dry powder of the unglazed ceramic blank:

drying the unglazed ceramic blank at 50-80 ℃ for 10-14 h, grinding by a dry method, and sieving to obtain dry powder of the unglazed ceramic blank;

step S3, preparing a tourmaline type negative ion unglazed ceramic blank:

respectively weighing the tourmaline type negative ion powder mixture obtained in the step S1 and the dry powder of the unglazed ceramic blank obtained in the step S2 according to parts by weight, putting the mixture into a ball mill, adding pure water, carrying out ball milling for 1-2 h, carrying out suction filtration, carrying out vacuum pugging, forming and drying to obtain a tourmaline type negative ion unglazed ceramic blank;

step S4, high-temperature sintering:

and (4) sintering the tourmaline type negative ion unglazed ceramic blank obtained in the step (S3) at a high temperature, wherein the temperature in the later sintering period is 1000-1280 ℃, and the heat preservation time in the later sintering period is 0.5-3 h, so as to obtain the tourmaline type negative ion unglazed ceramic sintered at a high temperature.

Further, in step S4, during the high-temperature sintering process, the temperature at the later stage of sintering is 1180 ℃ to 1280 ℃.

Further, in step S1, the weight ratio of the powder, the pure water, and the balls in the ball mill is 3:1:1 to 1:1: 1.

Further, in step S1, the dry-milled particles have a particle size of 200 to 325 mesh.

Further, in step S2, the dry-milled particles have a particle size of 200 to 25 mesh.

Further, in step S3, the weight ratio of the powder, the pure water, and the balls in the ball mill is 3:1:1 to 1:1: 1.

Further, in the step S3, the number of times of vacuum pugging is 4-8.

The technical scheme provided by the invention has the beneficial effects that:

(1) the invention provides a high-temperature sintered tourmaline type negative ion unglazed ceramic and a preparation method thereof, wherein the sintering temperature is usually more than 900 ℃ in the preparation process of the ceramic, the crystal structure of the tourmaline type negative ion powder is protected by introducing the ingredients of vermiculite powder, mullite powder, wollastonite powder and zirconium oxide powder, so that the sintered tourmaline type negative ion unglazed ceramic still has good negative ion release performance under the conditions that the temperature in the later sintering period is 1000-1280 ℃ and the heat preservation time in the later sintering period is 0.5-3 h in the high-temperature sintering process, and is a high-quality negative ion material, and the air negative ion induction amount of the negative ion material is 300-600 pieces/cm³。

(2) The preparation method of the high-temperature sintered tourmaline type negative ion unglazed ceramic provided by the invention is used for preparing products by high-temperature sintering, and the products are stable and have good weather resistance. And the mode of directly mixing the negative ion material and the ceramic blank is adopted, the operation is convenient, the production cost is low, the production period is shortened, the batch production is easy, and the high-temperature sintered tourmaline type negative ion ceramic is economic, energy-saving, continuous and environment-friendly, and can be widely applied to the production and processing of ceramic products.

Drawings

Fig. 1 is a high-temperature sintered tourmaline type negative ion unglazed ceramic provided by the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings and examples.

As shown in fig. 1, the raw materials of the tourmaline type negative ion unglazed ceramic sintered at high temperature provided by the invention comprise a tourmaline type negative ion powder mixed material and a unglazed ceramic blank dry powder, wherein the mass part of the unglazed ceramic blank dry powder is 65-80 parts; the mass portion of the tourmaline type anion powder mixture is 15-35, and the tourmaline type anion powder comprises the following components in parts by mass: 60-75 parts of tourmaline type negative ion powder, 16-21 parts of vermiculite powder, 15-19 parts of wollastonite powder, 8-17 parts of zirconium oxide powder and 9-16 parts of mullite powder.

The mechanism of tourmaline for generating negative ions is that six silicon-oxygen tetrahedrons (SiO)₄]^ⅣPointing in one direction together, the cations at that position are very easily transitioned into anionic holes. Therefore, the tourmaline crystal has a spontaneous polarization effect, and macroscopically shows that an electrostatic field exists around the tourmaline. The local high voltage generated by the spontaneous polarization effect of the tourmaline can ionize neutral molecules in the surrounding air and water, and the generated electrons are attached to adjacent molecules to be converted into negative ions.

The vermiculite powder and the zirconia powder are excellent heat insulation materials, the wollastonite powder is used as a heat insulation material, the vermiculite powder and the zirconia powder can be adhered and wrapped outside the tourmaline powder in the sintering process to play a role in heat insulation protection, the mullite powder belongs to a high-temperature crystalline phase and can resist high temperature, and a small amount of mullite powder is added to be mainly used as a transition layer between the wollastonite and the calcium carbide gas powder to adjust the fusion degree between the wollastonite and the calcium carbide gas powder, so that the tourmaline powder is further protected.

The crystal structure of the tourmaline type negative ion powder is protected by introducing the ingredients of the vermiculite powder, the mullite powder, the wollastonite powder and the zirconia powder, the negative ion induction capability of the tourmaline type negative ion powder is maintained after the high-temperature sintering process at the temperature of more than 900 ℃, the temperature rise program has no influence on the preparation of the tourmaline type negative ion unglazed ceramic, only the sintering temperature and the heat preservation time in the later sintering period have influence, so that in the high-temperature sintering process, the temperature in the later sintering period is 1000-1280 ℃, and the heat preservation time in the later sintering period is 0.5-3 h, the tourmaline type negative ion unglazed ceramic still has good negative ion release performance, can continuously induce more air negative ions, and can be selected to obtain the unglazed ceramic with better strength, and the temperature in the later sintering period is 1180-1280 ℃.

The method for preparing the tourmaline type negative ion unglazed ceramic sintered at high temperature according to the present invention will be described in detail with reference to the following examples. All the raw materials in the examples can be obtained through public commercial channels, and the tourmaline type negative ion powder is 10000 meshes of tourmaline powder sold by Hebeixuan mineral industry factories.

Example 1:

1) preparing tourmaline type negative ion mixed material:

weighing 75 parts of tourmaline type negative ion powder, 19 parts of vermiculite powder, 17 parts of wollastonite powder, 12 parts of zirconia powder and 12.5 parts of mullite powder according to the mass parts, putting the materials into a ball mill, adding pure water, wherein the weight ratio of the powder, the pure water and the balls in the ball mill is 1:1:1, carrying out ball milling for 3 hours, carrying out suction filtration, drying for 12 hours at 60 ℃, carrying out dry grinding to 200-mesh 325-mesh, and sieving to obtain the tourmaline type negative ion mixed material.

2) Preparing dry powder of the unglazed ceramic blank:

drying the unglazed ceramic blank at 60 ℃ for 12 hours, grinding the blank by a dry method to obtain 200-mesh powder with 325 meshes, and sieving the powder to obtain the dry powder of the unglazed ceramic blank.

3) Preparing a tourmaline type negative ion unglazed ceramic blank:

weighing 35 parts by weight of the tourmaline type negative ion powder mixture obtained in the step 1), weighing 75 parts by weight of the dry powder of the unglazed ceramic blank obtained in the step 2), putting the mixture into a ball mill, adding pure water, performing ball milling for 1 hour at the weight ratio of powder, pure water and balls in the ball mill of 1:1:1, performing suction filtration, performing vacuum pugging for 6 times, molding and drying to obtain the dry blank of the tourmaline type negative ion unglazed ceramic.

4) And (3) high-temperature sintering:

sintering the product obtained in the step 3), controlling the highest sintering temperature at 1180 ℃ and the high-temperature heat preservation time at 1 hour to obtain the high-temperature sintered tourmaline type negative ion unglazed ceramic, and detecting by using an air negative ion detector, wherein the air negative ion induction amount is 600 ion/cm³。

Example 2:

1) preparing tourmaline type negative ion mixed material:

weighing 60 parts of tourmaline type negative ion powder, 16 parts of vermiculite powder, 15 parts of wollastonite powder, 10 parts of zirconia powder and 11 parts of mullite powder according to the mass parts, putting the powder into a ball mill, adding pure water, carrying out ball milling for 3 hours at the weight ratio of the powder, the pure water and the balls in the ball mill of 1:1:1, carrying out suction filtration, drying for 12 hours at 60 ℃, carrying out dry grinding to 200-mesh 325-mesh, and sieving to obtain the tourmaline type negative ion mixed material.

2) Preparing dry powder of the unglazed ceramic blank:

drying the unglazed ceramic blank at 60 ℃ for 12 hours, grinding the blank by a dry method to obtain 200-mesh powder with 325 meshes, and sieving the powder to obtain the dry powder of the unglazed ceramic blank.

3) Preparing a tourmaline type negative ion unglazed ceramic blank:

weighing 15 parts by weight of the tourmaline type negative ion powder mixture obtained in the step 1), weighing 68 parts by weight of the dry powder of the unglazed ceramic blank obtained in the step 2), putting the mixture into a ball mill, adding pure water, performing ball milling for 1 hour with the weight ratio of powder, pure water and balls in the ball mill being 1:1:1, performing suction filtration, performing vacuum pugging for 6 times, molding and drying to obtain the dry blank of the tourmaline type negative ion unglazed ceramic.

4) And (3) high-temperature sintering:

sintering the product obtained in the step 3), controlling the highest sintering temperature at 1180 ℃ and the high-temperature heat preservation time at 3 hours to obtain the high-temperature sintered tourmaline type negative ion unglazed ceramic, and detecting by using an air negative ion detector, wherein the air negative ion induction amount is 200-350 pieces/cm³。

Example 3:

1) preparing tourmaline type negative ion mixed material:

weighing 60 parts of tourmaline type negative ion powder, 16 parts of vermiculite powder, 15 parts of wollastonite powder, 10 parts of zirconia powder and 11 parts of mullite powder according to the mass parts, putting the powder into a ball mill, adding pure water, carrying out ball milling for 3 hours at the weight ratio of the powder, the pure water and the balls in the ball mill of 1:1:1, carrying out suction filtration, drying for 12 hours at 60 ℃, carrying out dry grinding to 200-mesh 325-mesh, and sieving to obtain the tourmaline type negative ion mixed material.

2) Preparing dry powder of the unglazed ceramic blank:

drying the unglazed ceramic blank at 60 ℃ for 12 hours, grinding the blank by a dry method to obtain 200-mesh powder with 325 meshes, and sieving the powder to obtain the dry powder of the unglazed ceramic blank.

3) Preparing a tourmaline type negative ion unglazed ceramic blank:

weighing 15 parts by weight of the tourmaline type negative ion powder mixture obtained in the step 1), weighing 68 parts by weight of the dry powder of the unglazed ceramic blank obtained in the step 2), putting the mixture into a ball mill, adding pure water, performing ball milling for 1 hour with the weight ratio of powder, pure water and balls in the ball mill being 1:1:1, performing suction filtration, performing vacuum pugging for 6 times, molding and drying to obtain the dry blank of the tourmaline type negative ion unglazed ceramic.

4) And (3) high-temperature sintering:

sintering the product obtained in the step 3), controlling the highest sintering temperature at 1280 ℃ and the high-temperature heat preservation time at 3 hours to obtain the high-temperature sintered tourmaline type negative ion unglazed ceramic, and detecting the high-temperature sintered tourmaline type negative ion unglazed ceramic by using an air negative ion detector, wherein the air negative ion induction amount is 150 ion materials/cm and 300 ion materials/cm³。

Comparative example 1:

1) preparing a tourmaline type negative ion material:

weighing tourmaline type negative ion powder, putting the powder into a ball mill, adding pure water, ball milling for 3 hours, carrying out suction filtration, drying for 12 hours at 60 ℃, carrying out dry grinding to 200-mesh 325-mesh, and sieving to obtain the tourmaline type negative ion material, wherein the weight ratio of the powder, the pure water and the balls in the ball mill is 1:1: 1.

2) Preparing dry powder of the unglazed ceramic blank:

drying the unglazed ceramic blank at 60 ℃ for 12 hours, grinding the blank by a dry method to obtain 200-mesh powder with 325 meshes, and sieving the powder to obtain the dry powder of the unglazed ceramic blank.

3) Preparing a tourmaline type negative ion unglazed ceramic blank:

weighing 15 parts of tourmaline type negative ion powder material obtained in the step 1) and 68 parts of dry powder of the unglazed ceramic blank obtained in the step 2), putting the materials into a ball mill, adding pure water, performing ball milling for 1 hour, performing suction filtration, performing vacuum pugging for 6 times, molding and drying to obtain the dry blank of the tourmaline type negative ion unglazed ceramic.

4) And (3) high-temperature sintering:

sintering the product obtained in the step 3), controlling the highest temperature of sintering at 1180 ℃, and controlling the high-temperature heat preservation timePreparing the tourmaline type negative ion unglazed ceramic sintered at high temperature for 3 hours, and detecting the tourmaline type negative ion unglazed ceramic by using an air negative ion detector, wherein the air negative ion induction amount is 40-60/cm³。

In conclusion, the ingredients such as the vermiculite powder are used for protecting the tourmaline powder, the tourmaline-type anion ceramic still has good anion release performance under the sintering condition that the highest sintering temperature is 1180-1280 ℃ and the heat preservation time at the highest temperature is 0.5-3 h, and the air anion induction amount is up to 600 pieces/cm³Moreover, the sintering condition can meet the sintering requirement of most daily ceramics.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.