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US4781859A Expired / Lapsed US ⏱️ 0.0 years remaining

Voltage-dependent non-linear resistance ceramic composition

Assignee: Panasonic Holdings Corp
•
Filing: 1986-11-14
•
Granted: 1988-11-01
•
Expires: 2006-11-14
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Abstract

Abstract A voltage-dependent non-linear resistance ceramic composition comprises SrTiO3, Sr1-xBaxTiO3 (0.001</=x</=0.300) or Sr1-xCaxTiO3 (0.001</=x</=0.300) as host material and further includes 0.001-2.000 mol % of Y2O3 as metal oxide for semiconductorization acceleration, 0.001-3.000 mol % of metal oxide(s) of at least one selected from the group consisting of Ca2O3, CuO, Ag2O, Al2O3, ZrO2, Bao, SiO2, MgO, B2O3, MnO2, NiO, MoO3+L, BeO, Fe2O3, Li2O, Cr2O3, PbO, CaO, TiO2, P2O5, Sb2O3 and V2O5, which segregates at grain boundary to make the grain boundary selectively to high resistances; an element made of the composition has both characteristics of capacitance and varistor, and is suitable for filter to remove noise or surge.

Inventors

  • 👤 Keiichi Noi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 22:14
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/108; H01C7/115; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/47

Claims Analysis

Total Claims: 22
Claim 1
Independent Claim 65 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 95.000-99.997 mol % of SrTiO 3 , Sr 1-x Ba x TiO 3 (0.001≦x≦0.300) or Sr 1-x Ca x TiO 3 (0.001≦x≦0.300) as host material wherein the ratio of Sr/Ti is 1.05-0.95, 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , and 0.001-1.000 mol % of CuO.
Claim 2
Dependent Claim 65 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 95.000-99.997 mol % of SrTiO 3 , Sr 1-x Ba x TiO 3 (0.001≦x≦0.300) or Sr 1-x Ca x TiO 3 (0.001≦x≦0.300) as host material wherein the ratio of Sr/Ti is 1.05-0.95, 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , and 0.001-1.000 mol % of CuO.
Claim 3
Dependent Claim 89 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 92.000-99.996 mol % of SrTiO 3 , Sr 1-x Ba x TiO 3 (0.001≦x≦0.300) or Sr 1-x Ca x TiO 3 (0.001≦x≦0.300) as host material wherein the ratio of Sr/Ti is 1.05-0.95, 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , 0.001-1.000 mol % of CuO, and 0.001-3.000 mol % of at least one metal oxide selected from the group consisting of Ag 2 O and Al 2 O 3 .
Claim 4
Dependent Claim 89 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 92.000-99.996 mol % of SrTiO 3 , Sr 1-x Ba x TiO 3 (0.001≦x≦0.300) or Sr 1-x Ca x TiO 3 (0.001≦x≦0.300) as host material wherein the ratio of Sr/Ti is 1.05-0.95, 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , 0.001-1.000 mol % of CuO, and 0.001-3.000 mol % of at least one metal oxide selected from the group consisting of Ag 2 O and Al 2 O 3 .
Claim 5
Dependent Claim 44 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 95.00-99.997 mol % of Sr 1-x Ba x TiO 3 (0.001≦x≦0.300) 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , and 0.001-1.000 mol % of CuO.
Claim 6
Dependent Claim 44 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 95.00-99.997 mol % of Sr 1-x Ba x TiO 3 (0.001≦x≦0.300) 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , and 0.001-1.000 mol % of CuO.
Claim 7
Dependent Claim 61 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 92.000-99.996 mol % of Sr 1-x Ba x TiO 3 (0.001≦x≦0.300), 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , 0.001-1.000 mol % of CuO, and 0.001-3.000 mol % of at least one of Ag 2 O and Al 2 O 3 .
Claim 8
Dependent Claim 61 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 92.000-99.996 mol % of Sr 1-x Ba x TiO 3 (0.001≦x≦0.300), 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , 0.001-1.000 mol % of CuO, and 0.001-3.000 mol % of at least one of Ag 2 O and Al 2 O 3 .
Claim 9
Dependent Claim 44 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 95.000-99.997 mol % of Sr 1-x Ca x TiO 3 (0.001≦x≦0.300), 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , and 0.001-1.000 mol % of CuO.
Claim 10
Dependent Claim 44 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 95.000-99.997 mol % of Sr 1-x Ca x TiO 3 (0.001≦x≦0.300), 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , and 0.001-1.000 mol % of CuO.
Claim 11
Dependent Claim 47 words
A voltage-dependent non-linear resistance ceramic composition according to claim 5 consisting of: 95.000-99.997 mol % of Sr 1-x Ca x TiO 3 (0.001≦x≦0.300), 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , and 0.001-1.000 mol % of CuO.
Claim 12
Dependent Claim 61 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 92.000-99.996 mol % of Sr 1-x Ca x TiO 3 (0.001≦x≦0.300), 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , 0.001-1.000 mol % of CuO, and 0.001-3.000 mol % of at least one of Ag 2 O and Al 2 O 3 .
Claim 13
Dependent Claim 61 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 92.000-99.996 mol % of Sr 1-x Ca x TiO 3 (0.001≦x≦0.300), 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , 0.001-1.000 mol % of CuO, and 0.001-3.000 mol % of at least one of Ag 2 O and Al 2 O 3 .
Claim 14
Dependent Claim 64 words
A voltage-dependent non-linear resistance ceramic composition according to claim 7 consisting of: 92.000-99.996 mol % of Sr 1-x Ca x TiO 3 (0.001≦x≦0.300), 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , 0.001-1.000 mol % of CuO, and 0.001-3.000 mol % of at least one of Ag 2 O and Al 2 O 3 .
Claim 15
Dependent Claim 65 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 93.000-99.995 mol % of SrTiO 3 having Sr/Ti ratio of 1.050-0.950, 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , 0.001-1.000 mol % of CuO, and 0.001-1.000 mol % of one oxide selected from the group consisting of BaO, SiO 2 , MgO and MnO 2 .
Claim 16
Dependent Claim 65 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 93.000-99.995 mol % of SrTiO 3 having Sr/Ti ratio of 1.050-0.950, 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , 0.001-1.000 mol % of CuO, and 0.001-1.000 mol % of one oxide selected from the group consisting of BaO, SiO 2 , MgO and MnO 2 .
Claim 17
Dependent Claim 69 words
A voltage-dependent non-linear resistance ceramic composition according to claim 9 consisting of: 93.000-99.995 mol % of SrTiO 3 having an Sr/Ti ratio of 1.050-0.950, 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , 0.001-1.000 mol % of CuO, and 0.001-1.000 mol % of one oxide selected from the group consisting of BaO, SiO 2 , MgO and MnO 2 .
Claim 18
Dependent Claim 124 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 91.000-99.994 mol % of SrTiO 3 having Sr/Ti ratio of 1.050-0.950, 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , 0.001-1.000 mol % of CuO, and 0.001-1.000 mol % of Ag 2 O, 0.001-1.000 mol % of one oxide selected from the group consisting of BaO, SiO 2 , MgO and MnO 2 , and 0.001-1.000 mol % of at least one oxide NiO, MoO 3 , BeO, Fe 2 O 3 , Li 2 O, Cr 2 O 3 , PbO, CaO, TiO 2 , P 2 O 5 , Sb 2 O 3 , Al 2 O 3 and V 2 O 5 .
Claim 19
Dependent Claim 124 words
A voltage-dependent non-linear resistance ceramic composition consisting essentially of: 91.000-99.994 mol % of SrTiO 3 having Sr/Ti ratio of 1.050-0.950, 0.001-2.000 mol % of Y 2 O 3 , 0.001-2.000 mol % of Co 2 O 3 , 0.001-1.000 mol % of CuO, and 0.001-1.000 mol % of Ag 2 O, 0.001-1.000 mol % of one oxide selected from the group consisting of BaO, SiO 2 , MgO and MnO 2 , and 0.001-1.000 mol % of at least one oxide NiO, MoO 3 , BeO, Fe 2 O 3 , Li 2 O, Cr 2 O 3 , PbO, CaO, TiO 2 , P 2 O 5 , Sb 2 O 3 , Al 2 O 3 and V 2 O 5 .
Claim 20
Dependent Claim 32 words
A voltage-dependent non-linear resistance ceramic composition according to claim 11 consisting of: 95.000-99.994 mol % of SrTiO 3 having an Sr/Ti ratio of 1.050-0.950, 0.001-2.000 mol % of Y 2 O 3
Claim 21
Dependent Claim 99 words
001-2.000 mol % of Co 2 O 3 , 0.001-1.000 mol % of CuO, 0.001-1.000 mol % of Ag 2 O, 0.001-1.000 mol % of one oxide selected from the group consisting of BaO, SiO 2 , MgO and MnO 2 , and 0.001-1.000 mol % of at least one oxide selected from the group consisting of NiO, MoO 3 BeO, Fe 2 O 3 , Li 2 O, Cr 2 O 3 , PbO, CaO, TiO 2 , P 2 O 5 , Sb 2 O 3 , Al 2 O 3 and V 2 O 5 .
Claim 22
Dependent Claim 99 words
001-2.000 mol % of Co 2 O 3 , 0.001-1.000 mol % of CuO, 0.001-1.000 mol % of Ag 2 O, 0.001-1.000 mol % of one oxide selected from the group consisting of BaO, SiO 2 , MgO and MnO 2 , and 0.001-1.000 mol % of at least one oxide selected from the group consisting of NiO, MoO 3 BeO, Fe 2 O 3 , Li 2 O, Cr 2 O 3 , PbO, CaO, TiO 2 , P 2 O 5 , Sb 2 O 3 , Al 2 O 3 and V 2 O 5 .

References Cited (Backward Citations)

JPS5368899A Cited
EP0040391A2 Cited
GB2080789A Cited
EP0070540A1 Cited
US4545929A Cited
JPS5878414A Cited
US4438214A Cited
EP0101824A2 Cited
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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-11-01 1992-05-02 1992-11-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-11-01 1996-05-02 1996-11-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-11-01 2000-05-02 2000-11-01 $7700.00 Window Closed / Lapsed

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