The Selection of Grain-growth Control Additives for the Sintering of Ceramics

D. W. Budworth
Doulton Research Limited, Basil Green Laboratories, Hanworth Lane, Chertsey, Surrey

Summary: The close interrelation between sintering and grain growth is discussed critically, and the necessity for control, but not suppression, of grain growth is established. A distinction between discontinuous and exaggerated grain growth is drawn, and the superiority of grain boundary films as grain-growth control agents is demonstrated. Work on the establishment of tentative criteria for the selection of grain-growth control additives for alumina is reviewed and discussed, and the extension of these ideas to the selection of NaF as a successful aid for magnesia is described.

Mineralogical Magazine; September 1970 v. 37; no. 291; p. 833-838; DOI: 10.1180/minmag.1970.037.291.08
© 1970, The Mineralogical Society
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