Transparent, mullite glass-ceramics containing ZnO and method

Details Transparent, mullite glass-ceramics containing ZnO and method Transparent, mullite glass-ceramics containing ZnO and method

1984-07-02

1985-07-02

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

2523016F, 501 67, 501 79, 501904, C03C 322, C09K 1110

Patent

active

045268738

ABSTRACT:
There is disclosed an improved, transparent, mullite glass-ceramic doped with Cr.sub.2 O.sub.3 to fluoresce in the 650-900 nm. region of the spectrum and having an absorption peak centered at about 600 nm. The improvement is inclusion in the composition of 2-15% by weight of ZnO and sufficient MgO, if necessary, to provide at least 5% ZnO+MgO. The ZnO or ZnO--MgO components selectively shift the absorption peak centered at 600 nm. toward the lower (blue) end of the spectrum.

REFERENCES:
patent: 2447448 (1948-08-01), Williams
patent: 3440172 (1969-04-01), Albinak et al.
patent: 3681102 (1972-08-01), Beall
patent: 4396720 (1983-08-01), Beall et al.

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