Medium-temperature daily double-sided crack glaze ceramic and preparation method

Abstract

The invention relates to a medium-temperature daily double-sided crack glaze ceramic and a preparation method. The medium-temperature daily double-sided crack glaze ceramic comprises a preform body and glaze, the preform body is prepared from the following chemical ingredients in mass percent: 57-59% of SiO2, 30-35% of Al2O3, 0.1-0.5% of CaO, 2-2.5% of MgO, 3-3.5% of K2O and 0.1-0.5% of Na2O, and the breaking strength is 100-120MPa; the preparation method of the medium-temperature daily double-sided crack glaze ceramic comprises the following steps: enabling the preform body to be manufactured into a green body, glazing, drying, then carrying out firing treatment, wherein the firing temperature is 1,260-1,280 DEG C, preserving heat for 20-25min, cooling naturally, then preserving the heat for 30min when the temperature drops to 1,100 DEG C, and then cooling continuously to obtain the medium-temperature daily double-sided crack glaze ceramic. The medium-temperature daily double-sided crack glaze ceramic increases the breaking strength of the green body, improves the breaking tenacity of products, and solves the defect that the products are easy to break.

Description

technical field [0001] The invention belongs to the technical field of daily-use ceramics, and in particular relates to a medium-temperature daily-use double-sided cracked glazed ceramic and a preparation method. Background technique [0002] The crackle glaze products currently used in daily tableware ceramics produced by my country are mainly: 1. High silicon and low aluminum (SiO2) 2 63-71%, Al 2 o 3 18-24%) is mainly porcelain, while the crystal phase of high-silicon and low-alumina porcelain is mainly glass phase, and the crystal phase of acicular mullite is less, so its flexural strength is low ( 60MPa or below), so that the damage rate of fried porcelain is high when the product is out of the kiln or after a period of storage after it is out of the kiln; 2. Because of the high damage rate of the product, it is generally used for decoration The surface) is made of cracked glaze, and the outer surface is produced with various non-cracked matte glaze decoration metho...

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Problems solved by technology

[0002] The crackle glaze products currently used in daily tableware ceramics produced by my country are mainly: 1. High silicon and low aluminum (SiO2) 2 63-71%, Al 2 o 3 18-24%) is mainly porcelain, while the crystal phase of high-silicon and low-alumina porcelain is mainly glass phase, and the crystal phase of acicular mullite is less, so its flexural strength is low ( 60MPa or below), so that the damage rate of fried porcelain is high when the product is out of the kiln or after a period of storage after it is out of the kiln; 2. Because of the high damage rate of the product, it is generally used for decoration The surface) is made of cracked glaze, and the outer surface is produced with various non-cracked matte glaze decoration methods to reduce the breakage rate of porcelain; 3. The expansion coefficient of the green body is generally 6.5 to 7.3×10 -6 / °C range, in order to make the glazed surface of the product produce cracks, the matching glaze is generally used with an expansion coefficient of 10-11×10 -6 / °C or above high-expansion glaze, and these high-expansion glazes contain high content of volatile fluxes such as potassium and sodium, which makes the glaze volatile during high-temperature firing and shortens the service life of the kiln

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