OGGETTI COMPOSTI DI BETA-ALLUMINA, DI PREVALENZA BETA-ALLUMINA EMETODO PER PRODURRE TALI OGGETTI.

摘要

A composite beta, mainly beta''- alumina article such as a tube comprises a first layer of beta- alumina, a second layer of mainly beta''-alumina adhering securely to the first layer, and the first layer consisting of 1 to 15 percent thickness of the total thickness of the article. A method is also described for producing such composite articles including electrophoretic codeposition onto a mandrel in a DC field of particulate materials in an organic suspension.