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1. (WO1985001724) ALUMINIUM OXIDE GLASS COMPOSITION AND MAGNETIC HEAD INCORPORATING SAME

Pub. No.:    WO/1985/001724    International Application No.:    PCT/US1984/001681
Publication Date: Apr 25, 1985 International Filing Date: Oct 19, 1984
IPC: C03C 27/04
C03C 8/24
G11B 5/147
G11B 5/235
Applicants: EASTMAN KODAK COMPANY
WEST, Bradford, Drake, Jr.
BERCHTOLD, Jean
Inventors: WEST, Bradford, Drake, Jr.
BERCHTOLD, Jean
Title: ALUMINIUM OXIDE GLASS COMPOSITION AND MAGNETIC HEAD INCORPORATING SAME
Abstract:
A glass composition and magnetic head containing such composition. The glass composition comprises an oxide of an alkali metal or alkaline earth metal, at least one metal oxide of a non-alkali metal in an amount sufficient to provide a coefficient of thermal expansion of 80 to 170 x 10-7oC-1, 5 to 15 mole % oxide of aluminium and 10 to 35 mole percent of a compatible glass former that renders the oxide of aluminium soluble in the composition.