Translucent polycrystalline alumina and process for producing th

Details Translucent polycrystalline alumina and process for producing th Translucent polycrystalline alumina and process for producing th

1993-04-21

1995-01-17

Group, Karl

Compositions: ceramic

Ceramic compositions

Aluminum compound containing

501105, C04B 3510

Patent

active

053825560

ABSTRACT:
Translucent polycrystalline alumina made of aluminum oxide containing magnesium oxide in an amount of larger than 0.01% by weight and less than 0.03% by weight, zirconium oxide in an amount of larger than 0.01% by weight and less than 0.06% by weight and calcium oxide in an amount of less than 0.001% by weight, all based on the weight of aluminum oxide, which alumina has good light transmittance and mechanical strength.

REFERENCES:
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patent: 4629593 (1986-12-01), Groh et al.
patent: 4633137 (1986-12-01), Scott et al.
patent: 4725467 (1988-02-01), Groh et al.
patent: 4797238 (1989-01-01), Rhodes et al.
Baikowski International Corporation 1981 "Baikowski Ceramic Aluminas" Ceramic Industry, May 1986 High-Purity Alumina Made in the U.S.A.
G. Toda et al. "Effects of Y.sub.2 O.sub.3 and MgO Addition on Transmittance of Sintered Al.sub.2 O.sub.3 ".
J. G. J. Peelen (1976) Philips tech. Rev. 36:47-52.

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