阅读说明：本技术 一种适用于低膨胀陶瓷炊具的保健功能型自释釉陶瓷及其制备方法 (Health-care functional self-release glaze ceramic suitable for low-expansion ceramic cooker and preparation method thereof ) 是由 董伟霞 包启富 董文洁 董子昊 周健儿 黄武清 于 2021-09-17 设计创作，主要内容包括：本发明公开了一种适用于低膨胀陶瓷炊具的保健功能型自释釉陶瓷,其原料组成为长石15～20wt％、自释釉诱导剂50～60wt％、高温低膨胀熔块14～27wt％、石英5～10wt％。此外,还公开了上述适用于低膨胀陶瓷炊具的保健功能型自释釉陶瓷的制备方法。本发明通过配方设计,无需上釉,引入的自释釉诱导剂不仅可以保证釉料的低膨胀性能,提高了低膨胀陶瓷的热稳定性,而且保证了产品质量,使得釉面具有养生保健功能,能够很好地满足日常养生需求。(The invention discloses a health-care functional self-releasing glaze ceramic suitable for a low-expansion ceramic cooker, which comprises the following raw materials of 15-20 wt% of feldspar, 50-60 wt% of self-releasing glaze inducer, 14-27 wt% of high-temperature low-expansion frit and 5-10 wt% of quartz. In addition, a preparation method of the health-care functional self-releasing glaze ceramic suitable for the low-expansion ceramic cooker is also disclosed. According to the invention, through the formula design, glazing is not required, and the introduced self-release glaze inducer can ensure the low expansion property of the glaze, improve the thermal stability of the low expansion ceramic, ensure the product quality, enable the glaze to have the health care function, and can well meet the daily health care requirement.)

1. A health-care functional self-releasing glaze ceramic suitable for low-expansion ceramic cookers is characterized by comprising the following raw materials: 15-20 wt% of feldspar, 50-60 wt% of self-releasing glaze inducer, 14-27 wt% of high-temperature low-expansion frit and 5-10 wt% of quartz; wherein the content of the first and second substances,

the chemical composition of the self-release glaze inducer is as follows: k₂O 0.20～0.25wt％、Na₂O 0.01～0.02wt％、Li₂O 2.56～2.64wt％，MgO 1.00～1.20wt％、CaO 0.07～0.09wt％、TFe₂O₃ 6.33～6.45wt％、ZnO 2.50～2.54wt％、BaO 1.56～1.58wt％、Al₂O₃ 14.46～14.68wt％、SiO₂66.02～66.50wt％、MnO 0.16～0.18wt％、TiO₂ 0.93～0.98wt％、NiO 0.03～0.05wt％、CuO 0.02～0.04wt％、ZrO₂ 0.03～0.04wt％、Y₂O₃ 0.01～0.02wt％、ZnO 0.01～0.02wt％、Cr₂O₃0.01-0.02 wt% and 3.50-4.09 wt% of ignition loss;

the chemical composition of the high-temperature low-expansion frit is as follows: k₂O 0.21～0.25wt％、Na₂O 0.02～0.03wt％、MgO 1.29～1.31wt％、CaO 0.08～0.10wt％、B₂O₃ 4.58～4.65wt％、ZnO 2.52～2.55wt％、BaO 1.58～1.60wt％、Al₂O₃ 13.50～13.77wt％、SiO₂ 71.69～71.88wt％、Li₂O 4.26～4.46wt％。

2. The method for preparing self-releasing glaze ceramic with health care function suitable for low expansion ceramic cooker in claim 1, characterized by comprising the following steps:

(1) adding feldspar, quartz and high-temperature low-expansion frits in the raw material composition into a ball mill for primary mixing ball milling, then adding a self-releasing glaze inducer for secondary mixing ball milling, and carrying out aging and molding (plastic molding, slip casting or dry pressing molding) to obtain a blank;

(2) and calcining the blank at the glaze firing temperature of 1270-1300 ℃ under the reducing atmosphere condition, and keeping the temperature for 30-60 min to obtain the health-care functional self-releasing glaze ceramic.

3. The method for preparing self-releasing glaze ceramic with health care function suitable for low expansion ceramic cooker as claimed in claim 2, wherein: the fineness of the material subjected to the primary mixing and ball milling in the step (1) is 0.06-0.07% of the material with a 250-mesh sieve residue; the time of the secondary mixing and ball milling is 20-30 min.

4. The method for preparing self-releasing glaze ceramic with health care function suitable for low expansion ceramic cooker as claimed in claim 2, wherein: the glaze surface of the prepared health-care functional self-releasing glaze ceramic has a coefficient of thermal expansion of 0.22-0.32 x 10^-6The temperature per DEG C and the far infrared radiation coefficient epsilon are 0.96-0.98.

Technical Field

The invention relates to the technical field of ceramic glaze, in particular to health-care functional self-release glaze ceramic suitable for low-expansion ceramic cookers and a preparation method thereof.

Background

Today, fast-paced life not only requires cookware products with high thermal shock resistance, but also requires that such products be heated for cooking in a short period of time, while maintaining the strength and safety that is desired. Compared with the original iron cooker, the ceramic cooker better conforms to the health concept, so the ceramic cooker is more and more in demand, and the requirements on performance such as low expansion performance are higher and higher. At present, the low-expansion ceramic cooker needs to be coated with a layer of matched low-expansion ceramic glaze. The requirement on the matching adaptability of the glaze is high, and glazing and drying are required, so that the process is complicated, the stability of the glaze is poor, and the function is single.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a health-care functional self-release glaze ceramic suitable for a low-expansion ceramic cooker. The invention also aims to provide a preparation method of the health-care functional self-releasing glaze ceramic suitable for the low-expansion ceramic cooker.

The purpose of the invention is realized by the following technical scheme:

the invention provides a health-care functional self-releasing glaze ceramic suitable for a low-expansion ceramic cooker, which comprises the following raw materials: 15-20 wt% of feldspar, 50-60 wt% of self-releasing glaze inducer, 14-27 wt% of high-temperature low-expansion frit and 5-10 wt% of quartz; wherein the content of the first and second substances,

the chemical composition of the self-release glaze inducer is as follows: k₂O 0.20～0.25wt％、Na₂O 0.01～0.02wt％、Li₂O 2.56～2.64wt％，MgO 1.00～1.20wt％、CaO 0.07～0.09wt％、TFe₂O₃6.33～6.45wt％、ZnO 2.50～2.54wt％、BaO 1.56～1.58wt％、Al₂O₃14.46～14.68wt％、SiO₂66.02～66.50wt％、MnO 0.16～0.18wt％、TiO₂0.93～0.98wt％、NiO 0.03～0.05wt％、CuO 0.02～0.04wt％、ZrO₂0.03～0.04wt％、Y₂O₃0.01～0.02wt％、ZnO 0.01～0.02wt％、Cr₂O₃0.01-0.02 wt% and 3.50-4.09 wt% of ignition loss;

the chemical composition of the high-temperature low-expansion frit is as follows: k₂O 0.21～0.25wt％、Na₂O 0.02～0.03wt％、MgO 1.29～1.31wt％、CaO 0.08～0.10wt％、B₂O₃4.58～4.65wt％、ZnO 2.52～2.55wt％、BaO 1.58～1.60wt％、Al₂O₃13.50～13.77wt％、SiO₂71.69～71.88wt％、Li₂O 4.26～4.46wt％。

The other purpose of the invention is realized by the following technical scheme:

the invention provides a preparation method of the health-care functional self-releasing glaze ceramic suitable for the low-expansion ceramic cooker, which is characterized by comprising the following steps of:

(1) adding feldspar, quartz and high-temperature low-expansion frits in the raw material composition into a ball mill for primary mixing ball milling, then adding a self-releasing glaze inducer for secondary mixing ball milling, and carrying out aging and molding (plastic molding, slip casting or dry pressing molding) to obtain a blank;

(2) and calcining the blank at the glaze firing temperature of 1270-1300 ℃ under the reducing atmosphere condition, and keeping the temperature for 30-60 min to obtain the health-care functional self-releasing glaze ceramic.

Further, the fineness of the material subjected to primary mixing and ball milling in the step (1) is 0.06-0.07 percent of the residue of a 250-mesh sieve; the time of the secondary mixing and ball milling is 20-30 min.

In the above scheme, the glaze of the health-care functional self-releasing glaze ceramic has a coefficient of thermal expansion of 0.22～0.32×10^-6The temperature per DEG C and the far infrared radiation coefficient epsilon are 0.96-0.98.

The invention has the following beneficial effects:

(1) by optimizing the formula design, the introduced self-release glaze inducer not only can ensure the low expansion performance of the glaze and improve the thermal stability of the low expansion ceramic, but also has wide temperature range and small influence by the temperature fluctuation of the kiln; the introduced self-releasing glaze inducer also enables the blank to react and melt more fully to generate a large amount of liquid phase, transition metal elements migrate to the surface along with the liquid phase in the reaction process to endow the glaze surface with a far infrared function, and the liquid phase inside the glaze surface is supersaturated and crystallized, so that the viscosity of the liquid phase is increased, and the blank is prevented from collapsing and deforming. Therefore, the formula system of the invention enlarges the melting temperature range of the glaze under the reducing atmosphere condition, and glazing is not needed, thereby not only ensuring the product quality, but also ensuring the glaze surface to have the health care function and well meeting the daily health care requirement.

(2) The self-releasing glaze inducer used by the invention is rich in transition metal elements such as Fe, Ti and the like, can decompose fat in food, can emit far infrared rays in the heating process to activate lipase, can make the food soft and beautiful but not greasy, and has the effects of health care, disease prevention and the like.

(3) The glaze material has good stability, the obtained glaze layer has compact structure, is not easy to scratch and absorb dirt, the thermal expansion coefficient is adjustable, the health care function is endowed, the glaze material is based on the production process of general daily ceramics, the essential conditions are provided for a low-expansion ceramic pot tool matched with an electric appliance, the industry upgrading is facilitated, and the glaze material has a promoting effect on the technical progress and the application development of the low-expansion ceramic industry.

Drawings

The invention will now be described in further detail with reference to the following examples and the accompanying drawings:

FIG. 1 is a sectional view of a green glaze of a health-care functional self-releasing glazed ceramic according to an embodiment of the present invention.

Detailed Description

The embodiment of the invention provides a health-care functional self-releasing glaze ceramic suitable for a low-expansion ceramic cooker, which comprises the following raw materials: 15-20 wt% of feldspar, 50-60 wt% of self-releasing glaze inducer, 14-27 wt% of high-temperature low-expansion frit and 5-10 wt% of quartz. The raw material composition of each example is shown in table 1.

TABLE 1 composition of raw materials (wt%) of self-releasing glaze of each example of the present invention

Wherein, the chemical composition of the self-releasing glaze inducer is as follows: k₂O 0.20wt％、Na₂O 0.01wt％、Li₂O 2.56wt％，MgO 1.00wt％、CaO 0.07wt％、TFe₂O₃6.33 wt％、ZnO 2.50wt％、BaO 1.56wt％、Al₂O₃14.46 wt％、SiO₂66.02 wt％、MnO 0.16wt％、TiO₂0.93 wt％、NiO 0.03wt％、CuO 0.02wt％、ZrO₂0.03 wt％、Y₂O₃0.01 wt％、ZnO 0.01wt％、Cr₂O₃0.01 wt% and 4.09 wt% of ignition loss;

the chemical composition of the high-temperature low-expansion frit is as follows: k₂O 0.21wt％、Na₂O 0.02wt％、MgO 1.29wt％、CaO 0.08wt％、B₂O₃4.58 wt％、ZnO 2.52wt％、BaO 1.58wt％、Al₂O₃13.77 wt％、SiO₂71.69 wt％、Li₂O 4.26wt％。

The preparation method of the health-care functional self-releasing glaze ceramic suitable for the low-expansion ceramic cooker comprises the following steps:

(1) adding feldspar, quartz and high-temperature low-expansion frits in the raw material composition into a ball mill, carrying out primary mixing ball milling until the fineness is 0.06-0.07 percent of the rest of a 250-mesh sieve, then adding a self-releasing glaze inducer, carrying out secondary mixing ball milling for 20-30 min, and carrying out aging and forming (plastic forming, slip casting or dry pressing forming) to obtain a blank; the process parameters of each example are shown in table 2;

TABLE 2 Process parameters of the preparation method of the self-releasing glaze of the embodiments of the present invention

(2) And calcining the blank at the glaze firing temperature of 1270-1300 ℃ in a reducing atmosphere for 30-60 min to obtain the health-care functional self-releasing glaze ceramic.

The process parameters of the examples and the performance indices obtained for the glazed ceramic obtained are shown in Table 3

TABLE 3 application of glaze obtained in each example of the present invention and glaze performance index

As shown in FIG. 1, in the self-releasing glaze ceramic with health-care function according to the embodiment of the present invention, the body is composed of many closed pores and a small number of pores, and the upper layer of the body is composed of a thin layer of glaze.