Glaze compositions for ceramic substrates

Details Glaze compositions for ceramic substrates Glaze compositions for ceramic substrates

1986-04-03

1988-05-24

Dixon, Jr., William R.

Stock material or miscellaneous articles

Composite

Of quartz or glass

501 14, 501 15, 501 64, 501 69, 501152, 501153, 501154, C03C 800

Patent

active

047465786

ABSTRACT:
Glaze compositions for ceramic substrates such as an alumina substrate are described. In a first embodiment, the glaze composition consists of 55 to 75 mol % SiO.sub.2, 1 to 15 mol % Al.sub.2 O.sub.3, 3 to 20 mol % CaO, 1 to 13 mol % BaO and 0.1 to 5 mol % Y.sub.2 O.sub.3. In a second embodiment, the glaze composition consists essentially of 55 to 75 mol % SiO.sub.2, 1 to 15 mol % Al.sub.2 O.sub.3, 3 to 20 mol % CaO, 1 to 13 mol % BaO, 1 to 5 mol % Y.sub.2 O.sub.3, 25 mol % or less SrO, 7 mol % or less B.sub.2 O.sub.3, 2 mol % or less ZnO and 2 mol % or less MgO. In a third embodiment, the glaze composition consists essentially of 58 to 75 mol % SiO.sub.2, 2 to 15 mol % Al.sub.2 O.sub.3, 0.5 to 5 mol % La.sub.2 O.sub.3, 2 to 20 mol % CaO and 1 to 13 mol % BaO. In a fourth embodiment, the glaze composition consists essentially of 58 to 75 mol % SiO.sub.2, 2 to 15 mol % Al.sub.2 O.sub.3, 0.5 to 5 mol % La.sub.2 O.sub.3, 2 to 20 mol % CaO, 1 to 13 mol % BaO, 25 mol % or less SrO, 2 mol % or less MgO, 7 mol % or less B.sub.2 O.sub.3, and 5 mol % or less Y.sub.2 O.sub.3. These glaze compositions are suitable for use in surface glazing of ceramic substrates for thermal heads, printer heads, etc.

REFERENCES:
patent: 4256796 (1981-03-01), Hang et al.
patent: 4282035 (1981-08-01), Nigrin
patent: 4429007 (1984-01-01), Bich et al.
patent: 4624934 (1986-11-01), Kokubu et al.
patent: 4634634 (1987-01-01), Kondo et al.
Ceramic Glazes, Parmelee, C.; Industrial Publications, Inc., Chicago, Ill., 1951, p. 33.
Volf, M., Chemical Approach to Glass, NY, Elsevier, 1984, pp. 190-191, 272, 391.

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