Method of producing an infrared transmitting barium fluoride sin

Details Method of producing an infrared transmitting barium fluoride sin Method of producing an infrared transmitting barium fluoride sin

1995-05-17

1997-08-19

Czaja, Donald E.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Nonresinous material only

264666, B29D 1100

Patent

active

056585047

ABSTRACT:
The present invention provides a method of producing an infrared ray transmitting material, a large-sized one which can be manufactured 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 and being produced by a method of hot press sintering and an HIP treatment in combination, one that gives somewhat inferior transmission but which is low-priced produced by a method of CIP molding and normal pressure sintering in combination, and one that is regarded as an 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 the addition of any binder or sintering aid.

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Austin, A. E.; Mueller, J. J.; Miller, J. F.; Brog, K. C., "Fabrication of barium fluoride infrared windows," Battelle Mem. Inst., Columbus, Ohio, USA, U. S. N. T. I. S., AD-786-679, pp. 1-69. Sep. 1974.

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