What is glaze

glaze
Glaze is a thin and uniform layer of glassy material that melts on the surface of ceramic products.
Unglazed ceramic products usually have weak points such as rough and dull surface, easy moisture absorption, easy contamination, and easy erosion. Even if the sintering degree is high, it will affect their appearance, hygiene, and mechanical and electrical properties. When a layer of glassy glaze is applied on the surface of the body, the product can obtain a glossy, hard, and non absorbent surface. This not only improves the optical, mechanical, electrical, chemical and other properties of ceramic products, but also plays an important role in enhancing practicality and artistry. Therefore, it is very necessary to apply glaze on the surface of the body.
desiccation
The process of using thermal energy to dehydrate materials is called drying. After forming, various green bodies usually contain high moisture, especially those formed by plastic and injection molding, which are still in a plastic state and have low strength, which is not conducive to subsequent processing and transportation. Therefore, before the billet is fired, it must be dried in stages according to the operational requirements of each process until the final moisture content meets the requirements.
The purpose of body drying is to reduce the moisture content of the body and enable it to have sufficient ability to adsorb glaze slurry; Improve the mechanical strength of the billet and reduce damage during transportation and processing; Ensure that the green body has the lowest amount of water entering the kiln, shorten the firing cycle, and reduce fuel consumption.