Polycrystalline transparent spinel sintered body and a method fo

Details Polycrystalline transparent spinel sintered body and a method fo Polycrystalline transparent spinel sintered body and a method fo

1979-08-08

1981-06-16

Vertiz, O. R.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

264 65, 264 66, 425600, C04B 3544

Patent

active

042735874

ABSTRACT:
Polycrystalline spinel sintered body consisting mainly of Al.sub.2 O.sub.3 and MgO in a molar ratio of Al.sub.2 O.sub.3 /MgO of ranging from 0.52/0.48 to 0.70/0.30 and containing 0.001-0.1% by weight of LiF has a high in-line transmission. The sintered body can be obtained by calcining a powdery mixture of Al.sub.2 O.sub.3 and MgO in a specifically limited molar ratio, molding the calcined mixture into a shaped article together with a specifically limited amount of LiF, and firing the shaped article under a specifically limited temperature condition.

REFERENCES:
patent: 3026210 (1962-03-01), Coble
patent: 3768990 (1973-10-01), Sellers et al.
patent: 3950504 (1976-04-01), Belding et al.

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