Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Optical fiber – waveguide – or preform
Patent
1990-09-07
1992-10-06
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Optical fiber, waveguide, or preform
264 65, 264570, B29D 1100, F27B 904, B29C 4310
Patent
active
051529408
ABSTRACT:
A polycrystalline spinel sintered body is provided herein which is superior in light transmission, such that it can be used in an infrared light-transmitting window at a thickness of 2 mm or more. The present invention also provides a method of producing such light-transmitting spinel sintered body by hot pressing the spinel powders having high purity at temperatures of 1,200.degree. to 1,700.degree. C. and pressures of 100 to 500 kg/cm.sup.2 to compact the sintered body until a density of 95% relative to the theoretical density is achieved and then subjecting the thus sintered compact to a hot isostatic pressure treatment at temperatures of 1400.degree. to 1800.degree. C. and pressures of 500 kg/cm.sup.2 or more. Other variations of this basic method can be employed as disclosed in the specification. According to Applicants' method, a sintered body of high density and excellent light transmission can be achieved which is superior to prior art methods.
REFERENCES:
patent: 3530209 (1970-09-01), Ho
patent: 3562371 (1971-02-01), Bush
patent: 3974249 (1976-08-01), Roy et al.
patent: 4273587 (1981-06-01), Oda et al.
patent: 4461750 (1984-07-01), Chess et al.
patent: 4543346 (1985-09-01), Matsui et al.
patent: 4584151 (1986-04-01), Matsui et al.
patent: 4761390 (1988-08-01), Hartnett et al.
Nakamura Hiroshi
Shibata Kenichiro
Fiorilla Christopher A.
Lowe James
Sumitomo Electric Industries Ltd.
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