July 30, 2010, Newsletter Issue #406: Bone ash: Description

Tip of the Week

Bone ash is ground bones, usually cattle bones. It is one source of calcium phosphate; others are phosphorite and apatite. It is used as a flux in bodies where the calcium oxide does the fluxing and the phosphorus oxide acts as a glass-former in the melt and also checks over-rapid fusion. Its stiff glassy character is seen combined with that of feldspar in bone china. Bone china contains 45 – 50% of bone ash. A small amount of carbon remains in bone ash when calcination is controlled and this carbon assists the raw plasticity of the body.

About LifeTips

Now one of the top on-line publishers in the world, LifeTips offers tips to millions of monthly visitors. Our mission mission is to make your life smarter, better, faster and wiser. Expert writers earn dough for what they know. And exclusive sponsors in each niche topic help us make-it-all happen.

Not finding the advice and tips you need on this Ceramics Tip Site? Request a Tip Now!


Guru Spotlight
Jolyn Wells-Moran