Ceramic body glass composition for bonding and filling ceramic p

Details Ceramic body glass composition for bonding and filling ceramic p Ceramic body glass composition for bonding and filling ceramic p

1987-01-12

1988-05-03

Bell, Mark L.

Compositions

Magnetic

Iron-oxygen compound containing

252 6258, 252 6259, 501 32, 501 46, C03C 321, C03C 1400, C04B 3526

Patent

active

047418494

ABSTRACT:
The glass composition is particularly applicable for ferrite constituents used for a highly efficient magnetic head. The composition essentially consists of (a) 55-70 wt % of V.sub.2 O.sub.5, (b) 18-wt % of P.sub.2 O.sub.5, (c1) up to 10 wt % of at least one alkaline metal oxide selected from Na.sub.2 O, K.sub.2 O, Rb.sub.2 O, and Cs.sub.2 O and (c3) up to 10 wt % of Tl.sub.2 O. The composition is in a non-crystalline state during reheating and has a softening temperature of 310.degree. C.-400.degree. C. and a thermal expansion coefficient of 70-130.times.10.sup.-7 /.degree.C.

REFERENCES:
patent: 3278317 (1966-10-01), Blair et al.
patent: 3393060 (1968-07-01), Blair et al.
patent: 3520831 (1970-07-01), Trap
patent: 3650778 (1972-03-01), Dumesnil et al.
patent: 3983074 (1976-09-01), Kahn et al.
patent: 4342943 (1982-08-01), Weaver
Denton, E. P. et al.; "Low Expansion Solder Glasses in the System ZnO-B.sub.2 O.sub.3 -V.sub.2 O.sub.5 ", Journal of the Society of glass Technology 252T-259T.

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