Aluminosilicate glass containing Y.sub.2 O.sub.3 concentrate and

Details Aluminosilicate glass containing Y.sub.2 O.sub.3 concentrate and Aluminosilicate glass containing Y.sub.2 O.sub.3 concentrate and

1984-10-19

1985-07-23

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

106 97, 501 64, C03C 304

Patent

active

045309094

ABSTRACT:
A process for preparing aluminosilicate glass comprising from 30 to 60 molar % of SiO.sub.2, from 20 to 35 molar % of Al.sub.2 O.sub.3 and from 10 to 30 molar % of a total of rare earth oxides composed mainly of Y.sub.2 O.sub.3, wherein an yttrium concentrate is used as the rare earth oxides composed mainly of Y.sub.2 O.sub.3, and ZrO.sub.2 not in excess of 8 molar % to improve alkali resistance.

REFERENCES:
patent: 3573078 (1971-03-01), Bacon
patent: 3804646 (1974-04-01), Dumbaugh
patent: 3957500 (1976-05-01), Pitts
patent: 4088023 (1978-05-01), Berleue et al.
Makishima, A. et al., J. of Non-Crystalline Solids, 38 and 39, (1980), pp. 661-666.
Makishima, A. et al., J. of American Ceramic Society, vol. 61, No. 5-6, May-Jun. 1978, pp. 247-249.

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