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US4839313A Expired / Lapsed US ⏱️ 0.0 years remaining

Glaze compositions for ceramic substrates

Assignee: Niterra Co Ltd
•
Filing: 1987-11-17
•
Granted: 1989-06-13
•
Expires: 2007-11-17
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Abstract

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 2 , 1 to 15 mol % Al 2 O 3 , 3 to 20 mol % CaO, 1 to 13 mol % BaO and 0.1 to 5 mol % Y 2 O 3 . In a second embodiment, the glaze composition consists essentially of 55 to 75 mol % SiO 2 , 1 to 15 mol % Al 2 O 3 , 3 to 20 mol % CaO, 1 to 13 mol % BaO, 1 to 5 mol % Y 2 O 3 , 25 mol % or less SrO, 7 mol % or less B 2 O 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 2 , 2 to 15 mol % Al 2 O 3 , 0.5 to 5 mol % La 2 O 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 2 , 2 to 15 mol % Al 2 O 3 , 0.5 to 5 mol % La 2 O 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 2 O 3 , and 5 mol % or less Y 2 O 3 . These glaze compositions are suitable for use in surface glazing of ceramic substrates for thermal heads, printer heads, etc.

Inventors

  • 👤 Kazuo Kondo
  • 👤 Tatsunori Kurachi
  • 👤 Masahiko Okuyama

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 17:53
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/02; C03C8/04

Claims Analysis

Total Claims: 14
Claim 1
Independent Claim 85 words
A glaze composition for a ceramic substrate consisting essentially of 55 to 75 mol% SiO 2 , 1 to 15 mol% Al 2 O 3 , 3 to 20 mol% CaO, 1 to 13 mol% BaO, 1 to 5 mol% Y 2 O 3 , 0 to 25 mol% SrO, 0 to 7 mol% B 2 O 3 , 0 to 2 mol% ZnO, and 0 to 2 mol% MgO, and containing at least one of SrO, B 2 O 3 , ZnO and MgO.
Claim 2
Dependent Claim 85 words
A glaze composition for a ceramic substrate consisting essentially of 55 to 75 mol% SiO 2 , 1 to 15 mol% Al 2 O 3 , 3 to 20 mol% CaO, 1 to 13 mol% BaO, 1 to 5 mol% Y 2 O 3 , 0 to 25 mol% SrO, 0 to 7 mol% B 2 O 3 , 0 to 2 mol% ZnO, and 0 to 2 mol% MgO, and containing at least one of SrO, B 2 O 3 , ZnO and MgO.
Claim 3
Dependent Claim 16 words
A glaze composition as claimed in claim 1, wherein the ceramic substrate is an alumina substrate.
Claim 4
Dependent Claim 38 words
A glaze composition as claimed in claim 1, containing at least one of 2 to 25 mol% SrO, 1 to 7 mol% B 2 O 3 , 1 to 2 mol% ZnO and 0.3 to 2 mol% MgO.
Claim 5
Dependent Claim 91 words
A glaze composition for a ceramic substrate consisting essentially of 58 to 75 mol% SiO 2 , 2 to 15 mol% Al 2 O 3 , 0.5 to 5 mol% La 2 O 3 , 2 to 20 mol% CaO, 1 to 13 mol% BaO, 0 to 25 mol% SrO, 0 to 2 mol% MgO, 0 to 7 mol% B 2 O 3 and 0 to 5 mol% Y 2 O 3 , and containing at least one of SrO, MgO, B 2 O 3 and Y 2 O 3 .
Claim 6
Dependent Claim 91 words
A glaze composition for a ceramic substrate consisting essentially of 58 to 75 mol% SiO 2 , 2 to 15 mol% Al 2 O 3 , 0.5 to 5 mol% La 2 O 3 , 2 to 20 mol% CaO, 1 to 13 mol% BaO, 0 to 25 mol% SrO, 0 to 2 mol% MgO, 0 to 7 mol% B 2 O 3 and 0 to 5 mol% Y 2 O 3 , and containing at least one of SrO, MgO, B 2 O 3 and Y 2 O 3 .
Claim 7
Dependent Claim 16 words
A glaze composition as claimed in claim 4, wherein the ceramic substrate is an alumina substrate.
Claim 8
Dependent Claim 41 words
A glaze composition as in claim 4 containing at least one of 3.0 to 25 mol% SrO, 0.3 to 2 mol% MgO, 0.9 to 7 mol% B 2 O 3 , and 1.5 to 5 mol% Y 2 O 3 .
Claim 9
Dependent Claim 64 words
A glaze composition for a ceramic substrate consisting essentially of 55 to 75 mol% SiO 2 , 1 to 15 mol% Al 2 O 3 , 3 to 20 mol% CaO, 1 to 13 mol% BaO, 1 to 5 mol% Y 2 O 3 , 0 to 25 mol% SrO, 0 to 2 mol% ZnO, and containing at least one of SrO and ZnO.
Claim 10
Dependent Claim 64 words
A glaze composition for a ceramic substrate consisting essentially of 55 to 75 mol% SiO 2 , 1 to 15 mol% Al 2 O 3 , 3 to 20 mol% CaO, 1 to 13 mol% BaO, 1 to 5 mol% Y 2 O 3 , 0 to 25 mol% SrO, 0 to 2 mol% ZnO, and containing at least one of SrO and ZnO.
Claim 11
Dependent Claim 73 words
A glaze composition for a ceramic substrate consisting essentially of 58 to 75 mol% SiO 2 , 2 to 15 mol% Al 2 O 3 , 0.5 to 5 mol% La 2 O 3 , 2 to 20 mol% CaO, 1 to 13 mol% BaO, 0 to 25 mol% SrO, and 0 to 5 mol% Y 2 O 3 , and containing at least one of SrO and Y 2 O 3 .
Claim 12
Dependent Claim 73 words
A glaze composition for a ceramic substrate consisting essentially of 58 to 75 mol% SiO 2 , 2 to 15 mol% Al 2 O 3 , 0.5 to 5 mol% La 2 O 3 , 2 to 20 mol% CaO, 1 to 13 mol% BaO, 0 to 25 mol% SrO, and 0 to 5 mol% Y 2 O 3 , and containing at least one of SrO and Y 2 O 3 .
Claim 13
Dependent Claim 14 words
A ceramic substrate having thereon a coating of a glaze composition of claim 1.
Claim 14
Dependent Claim 14 words
A ceramic substrate having thereon a coating of a glaze composition of claim 4.

References Cited (Backward Citations)

SU535237A1 Cited
US4256796A Cited
US4282035A Cited
US4634634A Cited
US4429007A Cited
US4624934A Cited
JPH0655453A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1992-06-12 1992-12-12 1993-06-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1996-06-12 1996-12-12 1997-06-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2000-06-12 2000-12-12 2001-06-13 $7700.00 Window Closed / Lapsed

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