US4716134A
Expired / Lapsed
US
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Dielectric ceramic composition
Assignee: Mitsubishi Mining and Cement Co Ltd
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Filing: 1986-11-12
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Granted: 1987-12-29
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Expires: 2006-11-12
Abstract
Abstract There is provided a dielectric ceramic composition which comprises (Pb,La)(Zr,Ti)O3 and Pb(Mg1/3Nb2/3)O3 in the ratio defined by the formula below. x(Pb1-uLau)(Zr1-vTiv)O3.(1-x)Pb(Mg1/3Nb2/3)O3 wherein 0.10</=u</=0.28 0.25</=v</=1.00 0.03</=x</=0.
Inventors
- 👤 Takashi Yamaguchi
- 👤 Isao Ishiguchi
- 👤 Takeshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:38
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1254; C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/49; C04B35/491; C04B35/493; C04B35/495; C04B35/497; C04B35/499
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
31 words
A dielectric ceramic composition which comprises (Pb,La)(Zr,Ti)O 3 and Pb(Mg 1/3 Nb 2/3 )O 3 in the ratio defined by the formula below, x(Pb.sub.1-u La.sub.u)(Zr.sub.1-v Ti.sub.v)O.sub.3.(1-x)Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 wherein 1.0≦u≦0.28 0.25≦v≦1.00 0.03≦x≦0.50.
Claim 2
Dependent Claim
31 words
A dielectric ceramic composition which comprises (Pb,La)(Zr,Ti)O 3 and Pb(Mg 1/3 Nb 2/3 )O 3 in the ratio defined by the formula below, x(Pb.sub.1-u La.sub.u)(Zr.sub.1-v Ti.sub.v)O.sub.3.(1-x)Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 wherein 1.0≦u≦0.28 0.25≦v≦1.00 0.03≦x≦0.50.
Claim 3
Dependent Claim
26 words
A dielectric ceramic composition set forth in claim 1, which further comprises Pb(Fe 2/3 W 1/3 )O 3 in an amount of up to 9 mol%.
Claim 4
Dependent Claim
96 words
A dielectric ceramic composition set forth in claim 1, which further comprises one of Pb(Mg 1/2 W 1/2 )O 3 , Pb(Ni 1/2 W 1/2 )O 3 , Pb(Mg 1/2 W 1/2 )O 3 .Pb(Ni 1/2 W 1/2 )O 3 , Pb(Mg 1/2 W 1/2 )O 3 .Pb(Fe 2/3 W 1/3 )O 3 , Pb(Ni 1/2 W 1/2 )O 3 .Pb(Fe 2/3 W 1/3 )O 3 , and Pb(Mg 1/2 W 1/2 )O 3 .Pb(Ni 1/2 W 1/2 )O 3 .Pb(Fe 2/3 W 1/3 )O 3 in an amount of less than 5 mol% in total.
Claim 5
Dependent Claim
21 words
A dielectric ceramic composition set forth in claim 1, wherein the value of u in the formula is defined by 0.10≦u≦0.25.
Claim 6
Dependent Claim
21 words
A dielectric ceramic composition set forth in claim 1, wherein the value of v in the formula is defined by 0.30≦v≦1.00.
Claim 7
Dependent Claim
21 words
A dielectric ceramic composition set forth in claim 1, wherein the value of x in the formula is defined by 0.03≦x≦0.40.
Claim 8
Dependent Claim
24 words
A dielectric ceramic composition set forth in claim 2, wherein the amount of Pb(Fe 2/3 W 1/3 )O 3 is up to 8 mol%.
Claim 9
Dependent Claim
93 words
A dielectric ceramic composition set forth in claim 3, wherein the total amount of one of Pb(Mg 1/2 W 1/2 )O 3 , Pb(Ni 1/2 W 1/2 )O 3 , Pb(Mg 1/2 W 1/2 )O 3 .Pb(Ni 1/2 W 1/2 )O 3 , Pb(Mg 1/2 W 1/2 )O 3 .Pb(Fe 2/3 W 1/3 )O 3 , Pb(Ni 1/2 W 1/2 )O 3 .Pb(Fe 2/3 W 1/3 )O 3 , and Pb(Mg 1/2 W 1/2 )O 3 .Pb(Ni 1/2 W 1/2 )O 3 .Pb(Fe 2/3 W 1/3 )O 3 is up to 4 mol%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |