Daily-use dry heating resistant ceramic and manufacturing process

Abstract

The invention belongs to the field of daily-use ceramic products and particularly relates to a daily-use dry heating resistant ceramic and a manufacturing process. The daily-use dry heating resistant ceramic comprises a dry heating resistant body and a dry heating resistant glaze, the dry heating resistant body and a glaze layer of the dry heating resistant glaze are combined closely, the glaze layer of the dry heating resistant glaze is 0.5-0.8mm in thickness, and the ceramic is capable of withstanding high-temperature open-flame dry heating, resistant to a high temperature above 900 DEG C, extremely low in thermal expansion coefficient, excellent in thermal shock resistance, resistant to more than 30 times of 900-20 DEG C heat exchange without cracking and smaller than 0.003% in water absorption. By regulation of raw material components according to the manufacturing process of the daily-use dry heating resistant ceramic, compactness of the body can be improved, the body is kept intact and closely combined in a glazing process, green body firing is avoided, one-time firing molding is realized, and consequently energy consumption can be reduced by 40% or more, and fuel consumption and fuel cost are reduced while energy saving and emission reduction are significantly benefited.

Description

technical field [0001] The invention belongs to the field of daily-use ceramic products, in particular, relates to a daily-use dry-fire-resistant ceramic and its manufacturing process. Background technique [0002] Daily-use dry-fire-resistant ceramics refer to ceramic vessels that are dry-fired without load within a certain temperature, and the ceramic materials will not burst. For example, the application publication number is CN105130387A, which discloses a dry-fire-resistant ceramic and its preparation method. After the dry-fire-resistant ceramic is prepared with raw materials, the green body is directly fired into shape. The prepared dry-fire The water absorption rate of fired ceramics is 0.8-1.2%, and the heat-resistant temperature of dry firing is 400-450°C. [0003] The heat-resistant temperature of the existing general heat-resistant ceramics usually can only reach 400-600°C. When consumers use this type of ceramic products, the food is often cooked, and the cerami...

AI Technical Summary

Problems solved by technology

The addition of spodumene makes the porcelain have a low expansion coefficient and good heat resistance, but the same addition of spodumene will inevitably lead to a decrease in the ratio of kaolin to clay. If the green body with high lithium content is directly dipped in glaze, it will cause the green body Scattered and unable to be shaped, so the existing glazed daily-use dry-fired ceramics must be formed by a biscuit firing process before being glazed and re-fired. In addition, due to the gap between the glaze and the blank, the existing ones are therefore Hanging glaze is resistant to dry-fired porcelain, so it can only be heat exchanged once

[0004] Another example is the invention patent application publication number CN 102515715 A, which discloses a high heat-resistant ceramic and its preparation method. This kind of high heat-resistant ceramic is improved by formula composition. During production, the surface of the high heat-resistant ceramic is not glazed. It can withstand ten times of heat exchange at 800-20°C without cracking. This kind of high heat-resistant ceramics is not protected by the glaze layer, so it will not change when used, easy to be damaged, and it is not conducive to cleaning and beauty.