Low-melting-point glass glaze for sealing bottom of low-expansion ceramic liner and preparation method and application of low-melting-point glass glaze

Abstract

The invention relates to a low-melting-point glass glaze for sealing the bottom of a low-expansion ceramic liner and a preparation method and application of the low-melting-point glass glaze. The low-melting-point glass glaze is mainly prepared from the following raw materials in percent by mass: 26-30% of spodumene, 2-5% of petalite, 5-8% of aluminum oxide, 11-15% of quartz sand, 15-19% of magnesium oxide, 5-8% of boron anhydride, 6-10% of zirconia, 3-6% of minium and 2-5% of cerium oxide. The glass glaze has the advantages of low softening and solidifying temperatures and a low expansion coefficient which is matched with the expansion requirement of the low-expansion ceramic liner at the same time, so that the requirements of bottom sealing of the low-expansion ceramic liner are met, andthe glass glaze is durable and resistant to ablation, aging, detaching, melting and the like which are caused by high temperatures brought by various heating methods; in addition, no dissolved matteris generated during the application of the glass glaze, and the glass glaze has high applicability, brighter appearance and good waterproof and antifouling performance, and is healthier and more environmentally friendly, so that the problems that during the application of an organic coating and a water repellent agent, peeling off or generating of dissolved toxic matter occurs, and the organic coating and the water repellent agent cannot be cured simultaneously with decals and stuck water level lines are solved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of ceramics, in particular to a low-melting-point glass glaze for bottom sealing of a low-expansion ceramic liner, a preparation method and application thereof. Background technique [0002] With the improvement of people's living standards, they advocate green life and healthy life, and pay more attention to self-cultivation. Therefore, kitchen utensils have also blown a comprehensive ceramic trend. Ceramic hot pots, ceramic stew pots, ceramic rice cookers, ceramic woks, etc. The more popular people are. [0003] At present, the heating methods of ceramic hot pots, ceramic stew pots, and ceramic rice cookers are mostly fixed heating plates. This direct heat transfer method requires the bottom of the ceramic liner to be in close contact with the heating plate, that is, the bottom of the ceramic liner It should have fairly good flatness. Ceramics are different from metal products. There is a large shrinkage...

AI Technical Summary

Problems solved by technology

Ceramics are different from metal products. There is a large shrinkage ratio in the firing process of the ceramic liner, which makes the bottom of the porcelain become deformed to a certain extent. It is necessary to use abrasive tools to smooth the bottom, and grinding the bottom will inevitably lead to the bottom of the outer surface of the liner. Unglazed, the carcass of the ceramic liner is exposed, and the ordinary glaze with a high softening and curing temperature cannot be applied again after the bottom is ground, so the exposed unglazed carcass will absorb water and dirt without the protection of the glaze layer, which is serious Affect the service life and aesthetics of the ceramic liner

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