Light-transmitting, polycrystalline alumina body and method for

Details Light-transmitting, polycrystalline alumina body and method for Light-transmitting, polycrystalline alumina body and method for

1978-11-28

1980-05-27

Gantz, Delbert E.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 42, C04B 3510

Patent

active

042048745

ABSTRACT:
A light-transmitting crystalline alumina body which consists of .alpha.-Al.sub.2 O.sub.3 containing 0.1 to 1.0 weight percent of strontium oxide. A method for producing an alumina body comprises preparing a mixture of finely divided alumina powder with 0.1 to 1.0 weight percent of finely divided powder of strontium oxide, pressing the mixture to form a compact, prefiring the compact at a temperature at about 1100.degree. C. in an oxygen containing atmosphere, and firing the prefired compact at a temperature of about 1650.degree. C. in an environment selected from the group consisting of vacuum and hydrogen.

REFERENCES:
patent: Re27083 (1971-03-01), Klinger et al.
patent: 3026210 (1962-03-01), Coble
patent: 3769049 (1973-10-01), Mutz et al.
patent: 3802893 (1974-04-01), Kiger et al.
patent: 3834915 (1974-09-01), Cleveland et al.
patent: 3905845 (1975-09-01), Kobayashi et al.
patent: 4031177 (1977-06-01), Auriol et al.

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