Lead aluminoborofluorosilicate moldable glasses

Details Lead aluminoborofluorosilicate moldable glasses Lead aluminoborofluorosilicate moldable glasses

1983-06-13

1984-05-08

Bell, Mark

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501901, 501903, C03C 308, C03C 310

Patent

active

044475500

ABSTRACT:
The instant invention is directed to optical glass compositions capable of being shaped under the combined action of temperature and pressure in a mold so as to obtain articles having surfaces exhibiting highly precise reproduction of the mold walls. The inventive glasses demonstrate softening points not exceeding 500.degree. C., refractive indices between about 1.65-1.82, Abbe number between about 27-39, and consist essentially, in weight percent, of

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patent: 3653933 (1972-04-01), Tsunekawa
patent: 3888692 (1975-06-01), Kuwayama
patent: 4109054 (1978-08-01), Burgyan
patent: 4123731 (1978-10-01), Kanbara et al.
patent: 4146655 (1979-03-01), Davis et al.
patent: 4285730 (1981-08-01), Sanford et al.
patent: 4348484 (1982-09-01), Joormann et al.
patent: 4362819 (1982-12-01), Olszewski et al.

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