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 the phenomenon of shrinkage glaze 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, raw water spray before glazing fabric blank which facilitates mixing and dirt remaining on the surface it is placed on the glazed soluble salts, but if over 2 hours before spray painting has been blank comprising 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, using a fine micron-sized raw materials, moisture penetration can be reduced to the glazed green body speed, when the glaze has a large drying shrinkage during drying surface of the body, so that cracks easily occur, so that the glaze must not exceed the amount of clay added 5%.
