Method of permanently bonding magnetic ceramics

Details Method of permanently bonding magnetic ceramics Method of permanently bonding magnetic ceramics

1977-12-07

1979-02-06

Kellogg, Arthur D.

Glass manufacturing

Processes

Fusion bonding of glass to a formed part

29603, C03C 2700

Patent

active

041382366

ABSTRACT:
A method of bonding hard and/or soft magnetic ferrite parts comprises the steps of applying an oxide glass which contains iron oxide in an amount corresponding to about 50 to about 200% of the iron oxide proportion in the eutectic point of the respective glass-forming multi-component system, about 0.4 to about 0.8 mole percent of a wetting agent selected from the group consisting of SiO.sub.2, P.sub.2 O.sub.5 and B.sub.2 O.sub.3 and about 0.1 to aout 0.4 mole percent of alkali oxides BaO, SrO, CaO, K.sub.2 O, Na.sub.2 O and Li.sub.2 O to at least one of the surfaces to be bonded together. The oxide glass may be applied prior to or after prefiring or main firing and the frit or the raw material weight-in quantity of the glass may be used. Finally, the ferrite parts are fused at temperatures in excess of the glass softening point.

REFERENCES:
patent: 3188400 (1965-06-01), Vilensky

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