Patent US2435911A successfully refreshed from Google Patents.
Patent US4692422A successfully refreshed from Google Patents.
US4692422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High dielectric porcelain composition and method of reducing sintering temperature thereof
Assignee: TDK Corp
•
Filing: 1986-05-02
•
Granted: 1987-09-08
•
Expires: 2006-05-02
Abstract
Abstract A high dielectric porcelain composition having, as a main component, a Pb(Mg 1/3, Nb 2/3)O 3 -PbTiO 3 -Pb(Mn 1/3, Nb 2/3)O 3 system including 95 mol. % of Pb(Mg 1/3, Nb 2/3)O 3 , 5 mol. % of PbTiO 3 and 0.5 weight % of Pb(Mn 1/3, Nb 2/3)O 3 , and, in addition, a sub-component including PbO and ZnO. Such a dielectric porcelain is capable of being sintered at a temperature lower than 1000° C. A method of reducing the sintering temperature of such a high dielectric porcelain composition, is also provided.
Inventors
- 👤 Shinobu Fujiwara
- 👤 Atsushi Satoh
- 👤 Tetsuya Hattori
- 👤 Junichi Sutoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:20
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; C; C04; C04B; C04B35/00; C04B35/01; C04B35/495; C04B35/497; C04B35/499; H01G4/1209; H01G4/1254
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
132 words
High dielectric porcelain composition consisting essentially of a Pb(Mg 1/3, Nb 2/3)O 3 - PbTiO 3 - Pb(Mn 1/3, Nb 2/3)O 3 system having about 95 mol. % of Pb(Mg 1/3, Nb 2/3)O 3 , about 5 mol. % of PbTiO 3 , about 0.5 weight % of Pb(Mn 1/3, Nb 2/3)O 3 , and having distributed therethrough, in addition, a sintering temperature lowering effective amount of PbO and ZnO, wherein said sintering temperature lowering effective amount of said PbO and ZnO is between about 0.25-1.25% by weight of the weight of said Pb(Mg 1/3, Nb 2/3)O 3 - PbTiO 3 - Pb(Mn 1/3, Nb 2/3)O 3 system, and wherein said sintering temperature lowering effective amount includes about 50-93% by weight of said PbO and about 7-50% by weight of said ZnO.
Claim 2
Dependent Claim
132 words
High dielectric porcelain composition consisting essentially of a Pb(Mg 1/3, Nb 2/3)O 3 - PbTiO 3 - Pb(Mn 1/3, Nb 2/3)O 3 system having about 95 mol. % of Pb(Mg 1/3, Nb 2/3)O 3 , about 5 mol. % of PbTiO 3 , about 0.5 weight % of Pb(Mn 1/3, Nb 2/3)O 3 , and having distributed therethrough, in addition, a sintering temperature lowering effective amount of PbO and ZnO, wherein said sintering temperature lowering effective amount of said PbO and ZnO is between about 0.25-1.25% by weight of the weight of said Pb(Mg 1/3, Nb 2/3)O 3 - PbTiO 3 - Pb(Mn 1/3, Nb 2/3)O 3 system, and wherein said sintering temperature lowering effective amount includes about 50-93% by weight of said PbO and about 7-50% by weight of said ZnO.
Claim 3
Dependent Claim
43 words
The composition of claim 1, wherein said sintering temperature lowering effective amount of said PbO and ZnO is between about 0.3-1.25% by weight of the weight of said Pb(Mg 1/3, Nb 2/3)O 3 - PbTiO 3 - Pb(Mn 1/3, Nb 2/3)O 3 system.
Claim 4
Dependent Claim
43 words
The composition of claim 2, wherein said sintering temperature lowering effective amount of said PbO and ZnO is between about 0.5-1.25% by weight of the weight of said Pb(Mg 1/3, Nb 2/3)O 3 - PbTiO 3 - Pb(Mn 1/3, Nb 2/3)O 3 system.
Claim 5
Dependent Claim
28 words
The composition of claim 1, wherein said sintering temperature lowering effective amount includes about 67-90% by weight of said PbO and about 10-33% by weight of said ZnO.
Claim 6
Dependent Claim
28 words
The composition of claim 4, wherein said sintering temperature lowering effective amount includes about 80-90% by weight of said PbO and about 10-20% by weight of said ZnO.
Claim 7
Dependent Claim
140 words
Method of reducing sintering temperature of a high dielectric porcelain composition consisting essentially of a Pb(Mg 1/3, Nb 2/3)O 3 - PbTIO 3 - Pb(Mn 1/3, Nb 2/3)O 3 system having about 95 mol. % of Pb(Mg 1/3, Nb 2/3)O 3 , about 5 mol. % of PbTiO 3 , and about 0.5 weight % of Pb(Mn 1/3, Nb 2/3)O 3 , which comprises, in addition, incorporating therein a sintering temperature lowering effective amount of PbO and ZnO, wherein said sintering temperature lowering effective amount of said PbO and ZnO is between about 0.25-1.25% by weight of the weight of said Pb(Mg 1/3, Nb 2/3)O 3 - PbTiO 3 - Pb(Mn 1/3, Nb 2/3)O 3 system, and wherein said sintering temperature lowering effective amount includes about 50-93% by weight of said PbO and about 7-50% by weight of said ZnO.
Claim 8
Dependent Claim
140 words
Method of reducing sintering temperature of a high dielectric porcelain composition consisting essentially of a Pb(Mg 1/3, Nb 2/3)O 3 - PbTIO 3 - Pb(Mn 1/3, Nb 2/3)O 3 system having about 95 mol. % of Pb(Mg 1/3, Nb 2/3)O 3 , about 5 mol. % of PbTiO 3 , and about 0.5 weight % of Pb(Mn 1/3, Nb 2/3)O 3 , which comprises, in addition, incorporating therein a sintering temperature lowering effective amount of PbO and ZnO, wherein said sintering temperature lowering effective amount of said PbO and ZnO is between about 0.25-1.25% by weight of the weight of said Pb(Mg 1/3, Nb 2/3)O 3 - PbTiO 3 - Pb(Mn 1/3, Nb 2/3)O 3 system, and wherein said sintering temperature lowering effective amount includes about 50-93% by weight of said PbO and about 7-50% by weight of said ZnO.
Claim 9
Dependent Claim
43 words
The method of claim 6, wherein said sintering temperature lowering effective amount of said PbO and ZnO is between about 0.3-1.25% by weight of the weight of said Pb(Mg 1/3, Nb 2/3)O 3 - PbTiO 3 - Pb(Mn 1/3, Nb 2/3)O 3 system.
Claim 10
Dependent Claim
43 words
The method of claim 7, wherein said sintering temperature lowering effective amount of said PbO and ZnO is between about 0.5-1.25% by weight of the weight of said Pb(Mg 1/3, Nb 2/3)O 3 - PbTiO 3 - Pb(Mn 1/3, Nb 2/3)O 3 system.
Claim 11
Dependent Claim
28 words
The method of claim 6, wherein said sintering temperature lowering effective amount includes about 67-90% by weight of said PbO and about 10-33% by weight of said ZnO.
Claim 12
Dependent Claim
28 words
The method of claim 9, wherein said sintering temperature lowering effective amount includes about 80-90% by weight of said PbO and about 10-20% by weight of said ZnO.
References Cited (Backward Citations)
JPS5551761A
Cited
JPS5551760A
Cited
US4265668A
Cited
US4339544A
Cited
US4482935A
Cited
US4530031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |