Introduction of raw materials of bone porcelain

As the name implies, the main raw material of bone porcelain is bone powder, in addition to bone powder, there are two kinds of raw materials: one is natural mineral materials, mainly including quartz, feldspar, kaolin, etc., mainly used for green bodies; the other is chemical raw materials, such as borax, boric acid, light calcium carbonate, etc.

As the name implies, the main raw material of bone porcelain is bone powder, in addition to bone powder, there are two kinds of raw materials: one is natural mineral materials, mainly including quartz, feldspar, kaolin, etc., mainly used for green bodies; the other is chemical raw materials, such as borax, boric acid, light calcium carbonate, etc., as glaze raw materials or auxiliary materials for green bodies, and a small amount of water glass, alkali powder, sodium humate and so on as auxiliary materials. 

Bone powder is the main raw material of bone porcelain, and its dosage can reach 40%, 50% of the whole body, and is the main source of calcium phosphate in bone porcelain. 

The quality and dosage of bone powder have great influence on the hue, transparency, firing temperature and strength of bone porcelain products. 

Traditional bone porcelain generally uses animal bone powder as raw material, and now synthetic bone powder is also used to make bone porcelain. Its texture and properties are basically the same as traditional bone porcelain, and even some indexes are better than traditional bone porcelain. 

Animal bone meal. 

Animal bone powder is the product of vertebrate bone after degreasing, calcination and other processes, its main composition is hydroxyapatite, and a small amount of calcium fluoride, calcium carbonate, magnesium phosphate and so on. 

The bone meal used in the production is made from the bones of cattle, sheep, pigs and other animals, which are steamed and defatted at 1000 ℃, then calcined at 900 ℃ and 1300 ℃, ground by ball mill, washed or pickled, removed iron and dried. 

In order to avoid carbonization and blackening, bone pieces must be well ventilated when calcined. 

General bone glue factory in the extraction of bone glue after the bone residue, can also be used. 

As a raw material, bone powder itself is insoluble, and the melting temperature of calcium phosphate can reach 1720 ℃, but it can be used as a strong flux when the amount of bone powder in ordinary clay billet is less (2% of 20%).