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How to prevent shrinkage glaze in the process of ceramic production?

- Feb 13, 2018 -

Ceramic products in the production process has a glazing process, the so-called glazing refers to the depth of a certain glaze, that is suspended in the water glaze, the use of compressed air sprayed onto the surface of the green. The green body quickly absorbs moisture from the wet glaze and forms a harder surface, forming a glaze layer of 300 to 400 microns thickness on the fired article. However, when a lot of ceramic products come out, there is shrinkage glaze, which is the lack of glaze on the surface of ceramic products. How to prevent shrinkage glaze phenomenon in the process of ceramic production? Xiaobian suggested mainly in the glaze process control.

1, before spraying the glaze, carefully clean the product to ensure that it is flat and clean;

2. Sprinkle the raw fabric with water before glazing This helps to mix the dirt and soluble salts remaining on the surface of the body on the glaze but if the body has already been contained within 2 hours prior to glazing Clean water sponge scrub, you do not need to spray water;

3. Use clay with lower soluble salt to keep the model and floor clean. In repeated use, to remove BaC03;

4, to avoid stained in the green or oil. Compressed air may be introduced into the oil during pre-blank cleaning of the blank, so compressed air should be filtered off;

5, after the glaze spray to avoid knocking or scraping glaze layer;

6, the use of micron-level fine raw materials, glaze can reduce the rate of penetration of water to the body, when the glaze in the blank body surface drying has a larger drying shrinkage, so easy to crack, so glaze clay content should not exceed 5%.