Transactions of the INDIAN CERAMIC SOCIETY Vol. 54 1995
Raw Materials for Alumina Ceramics
T. R. RAMACHANDRAN
Pages : 117-123
DOI : 10.1080/0371750X.1995.10804703
Abstract
A brief presentation is made of the raw materials for alumina
ceramics. The important source is the alumina
trihydrate resulting from the Bayer process. Purification of
the Bayer aluminate liquor to minimise organics, iron
oxide and silica, reduction of sodium oxide content, special
conditions of precipitation and calcination and rme grinding
of the calcined material lead to the production of various
grades of alumina. Other processes involve acidification
of the aluminate liquor followed by drying and calcination
or treatment of aluminium amalgam with water to
precipitate aluminium hydroxide. Typical properties and
applications of alumina ceramics are discussed. A survey of
the world scene is made and the situation in India is briefly
reviewed. The importance of introducing collaborative
etfarts to accelerate activities in this field in India is stresfied.
