Infrared transmitting barium fluoride sintered body

Details Infrared transmitting barium fluoride sintered body Infrared transmitting barium fluoride sintered body

1995-02-16

1996-03-26

Group, Karl

Compositions: ceramic

Ceramic compositions

Fluorine containing

501123, 252584, 252587, C04B 35553

Patent

active

055020151

ABSTRACT:
The present invention provides an infrared ray transmitting material, even large-sized one being manufacturable at a low price, consisting of a polycrystal not liable to cleavage, which makes only a slight absorption of infrared rays all over the region of 8-11 .mu.m wave lengths, thus being highly transmissive. The material is a polycrystalline barium fluoride sintered body excellent in transmission to infrared region of 8-11 .mu.m wave lengths, one that is most excellent in the infrared transmission being produced by a method comprising the hot press sintering and the HIP treatment in combination, one that gives somewhat inferior transmission but which is low-priced by a method comprising the CIP molding and the normal pressure sintering in combination, and one that regarded as intermediate between the aforementioned two by a method comprising the CIP molding, normal-pressure sintering and the HIP treatment in combination, in all cases entirely without addition of any binder or sintering aid.

REFERENCES:
patent: 3312759 (1967-04-01), Letter
patent: 3359066 (1967-12-01), Hatch et al.
patent: 3431326 (1969-03-01), Letter
patent: 3981818 (1976-09-01), Swinehart
patent: 4038201 (1977-07-01), Hargreaves
patent: 4053572 (1977-10-01), Moss et al.
patent: 4171400 (1979-10-01), Rosette et al.

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