Verfahren zur Herstellung von Aluminiumboratwhiskern mit einer verbesserten Oberfläche auf der Basis von Gamma-Aluminiumoxyd

摘要

Aluminium borate whiskers by which a composite material having a higher strength than ever is available by definitely suppressing a generation of spinel along the surface of the whiskers are prepared by heating aluminium borate whiskers bearing a r-alumina surface layer in an atmosphere of ammonia gas or ammonia gas and a hydrocarbon gas such that a layer of a nitro-oxide and oxide of aluminium is generated along the surface of the whiskers.