US4386387A
Expired / Lapsed
US
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Low temperature sintering porcelain composition
Assignee: Resonac Corp
•
Filing: 1981-11-16
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Granted: 1983-05-31
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Expires: 2001-11-16
Abstract
Abstract A porcelain composition comprising Pb(Fe 2/3 W 1/3 )O 3 , PbTiO 3 and Pb(Yb 1/2 Nb 1/2 )O 3 preferably within the range as defined by closed area of A-B-C-D-A in the accompanying triangular diagram can give a sintered product by sintering at a temperature as low as 1000° C. or lower. The resulting sintered product has a high relative dielectric constant and a small dielectric loss tangent.
Inventors
- 👤 Hirayoshi Tanei
- 👤 Akira Ikegami
- 👤 Hideo Arima
- 👤 Tokio Isogai
- 👤 Kiyoshi Kawabata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:53
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1254; H01G4/1263; C; C04; C04B; C04B35/00; C04B35/01; C04B35/495; C04B35/497; C04B35/499
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
A porcelain composition for low temperature sintering consisting essentially of a component (X) of Pb(Fe 2/3 W 1/3 )O 3 , a component (Y) of PbTiO 3 and a component (Z) of Pb(Yb 1/2 Nb 1/2 )O 3 , with the sum of component (X), (Y) and (Z) being 100 Mole %, the proportions of the components (X), (Y) and (Z) being within the closed area of lines A-B-C-D-A in the triangular diagram of FIG. 1, with the values on the lines being excluded, and the points A to D having the following compositions in percents by mole: ______________________________________
(X) (Y) (Z)
______________________________________
A 100 0 0
B 35 65 0
C 20 10 70
D 30 0 70.
______________________________________
Claim 2
Dependent Claim
120 words
A porcelain composition for low temperature sintering consisting essentially of a component (X) of Pb(Fe 2/3 W 1/3 )O 3 , a component (Y) of PbTiO 3 and a component (Z) of Pb(Yb 1/2 Nb 1/2 )O 3 , with the sum of component (X), (Y) and (Z) being 100 Mole %, the proportions of the components (X), (Y) and (Z) being within the closed area of lines A-B-C-D-A in the triangular diagram of FIG. 1, with the values on the lines being excluded, and the points A to D having the following compositions in percents by mole: ______________________________________
(X) (Y) (Z)
______________________________________
A 100 0 0
B 35 65 0
C 20 10 70
D 30 0 70.
______________________________________
Claim 3
Dependent Claim
54 words
A porcelain composition according to claim 1, to which is added MnO 2 in an amount of 0.05 to 6% by mole based on 94 to 99.95% by mole of Pb(Fe 2/3 W 1/3 )O 3 (X), PbTiO 3 (Y) and Pb(Yb 1/2 Nb 1/2 )O 3 (Z), a total being 100% by mole.
Claim 4
Dependent Claim
20 words
A sintered product obtained by sintering the porcelain composition of claim 1 at a temperature of 1000° C. or lower.
Claim 5
Dependent Claim
20 words
A sintered product obtained by sintering the porcelain composition of claim 2 at a temperature of 1000° C. or lower.
Claim 6
Dependent Claim
32 words
A porcelain composition according to claim 1, wherein the proportions of components (X), (Y) and (Z) are defined by the following relationship in terms of percents by mole: 21≦X≦90 1≦Y≦64, and 1≦Z≦69.
Claim 7
Dependent Claim
24 words
A multilayer capacitor comprising a sintered product of claim 3 and an inner electrode made of an alloy containing silver as a main component.
Claim 8
Dependent Claim
25 words
A thick film capacitor comprising a sintered product of claim 3 and an inner electrode made of an alloy containing silver as a main component.
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) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |