Rice husk

Mature rice

Description

The outer seed covering from rice grains, a cereal obtained from genus Oryza sativa. Rice husks are separated from the seed during milling. When burnt, the husks can yield an ash which is greater than 95% silica. Rice husk ash has been used as a filler, an abrasive, and as a refractory material.

Comparisons

Properties of Common Abrasives

Sources Checked for Data in Record

• Robert Fournier, Illustrated Dictionary of Practical Pottery, Chilton Book Company, Radnor, PA, 1992

• Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976

• Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997

• The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998