US5132258A
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Microwave dielectric ceramic composition
Assignee: Sanyo Electric Co Ltd
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Filing: 1991-08-20
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Granted: 1992-07-21
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Expires: 2011-08-20
Abstract
Abstract A microwave dielectric ceramic composition containing as main components substances expressed by a composition formula of x·TiO 2 -y·ZrO 2 -z·SnO 2 (where 0.30≦x≦0.60, 0.25≦y≦0.60, and 0.025≦z≦0.20) when their molar fractions are taken as x, y and z (x+y+z=1), and containing as additives predetermined amounts of one type selected from the group consisting of MnO, Al 2 O 3 , CuO, Li 2 O and Ga 2 O 3 and predetermined amounts of one type selected from the group consisting of Nb 2 O 5 and Ta 2 O 5 .
Inventors
- 👤 Hisakazu Takahashi
- 👤 Yoko Baba
- 👤 Kenichi Ezaki
- 👤 Yasuhiko Okamoto
- 👤 Kenichi Shibata
- 👤 Kazuhiko Kuroki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:59
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/10; C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/49
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
124 words
A microwave dielectric ceramic composition consisting essentially of as main components substances expressed by a composition formula of x·TiO 2 -y·ZrO 2 -z·SnO 2 , where 0.30≦x≦0.60, 0.25≦y≦0.60, and 0.025≦z≦0.20 when their molar fractions are taken as x, y and z such that x+y+z=1 and containing as a first additive at least one member selected from the group consisting of MnO, Al 2 O 3 , CuO, Li 2 O and Ga 2 O 3 and at least one second additive selected from the group consisting of Nb 2 O 5 and Ta 2 O 5 , such that said first and second additives are present in respective amounts which are effective to raise a Q value of said composition to at least 5,000.
Claim 2
Dependent Claim
124 words
A microwave dielectric ceramic composition consisting essentially of as main components substances expressed by a composition formula of x·TiO 2 -y·ZrO 2 -z·SnO 2 , where 0.30≦x≦0.60, 0.25≦y≦0.60, and 0.025≦z≦0.20 when their molar fractions are taken as x, y and z such that x+y+z=1 and containing as a first additive at least one member selected from the group consisting of MnO, Al 2 O 3 , CuO, Li 2 O and Ga 2 O 3 and at least one second additive selected from the group consisting of Nb 2 O 5 and Ta 2 O 5 , such that said first and second additives are present in respective amounts which are effective to raise a Q value of said composition to at least 5,000.
Claim 3
Dependent Claim
54 words
The microwave dielectric ceramic composition according to claim 1, which contains as first and second additives not more than 5 parts by weight of said MnO and not more than 10 parts by weight of said Nb 2 O 5 with respect to 100 parts by weight of said substances which are main components.
Claim 4
Dependent Claim
57 words
The microwave dielectric ceramic composition according to claim 1, which contains as first and second additives not more than 5 parts by weight of said Al 2 O 3 and not more than 10 parts by weight of said Nb 2 O 5 with respect to 100 parts by weight of said substances which are main components.
Claim 5
Dependent Claim
54 words
The microwave dielectric ceramic composition according to claim 1, which contains as first and second additives not more than 5 parts by weight of said CuO and not more than 10 parts by weight of said Nb 2 O 5 with respect to 100 parts by weight of said substances which are main components.
Claim 6
Dependent Claim
56 words
The microwave dielectric ceramic composition according to claim 1, which contains as first and second additives not more than 5 parts by weight of said Li 2 O and not more than 10 parts by weight of said Nb 2 O 5 with respect to 100 parts by weight of said substances which are main components.
Claim 7
Dependent Claim
54 words
The microwave dielectric ceramic composition according to claim 1, which contains as first and second additives not more than 5 parts by weight of said MnO and not more than 10 parts by weight of said Ta 2 O 5 with respect to 100 parts by weight of said substances which are main components.
Claim 8
Dependent Claim
57 words
The microwave dielectric ceramic composition according to claim 1, which contains as first and second additives not more than 5 parts by weight of said Al 2 O 3 and not more than 10 parts by weight of said Ta 2 O 5 with respect to 100 parts by weight of said substances which are main components.
Claim 9
Dependent Claim
54 words
The microwave dielectric ceramic composition according to claim 1, which contains as first and second additives not more than 5 parts by weight of said CuO and not more than 10 parts by weight of said Ta 2 O 5 with respect to 100 parts by weight of said substances which are main components.
Claim 10
Dependent Claim
55 words
The microwave dielectric ceramic composition according to claim 1, which contains as first and second additives not more than 5 parts by weight of said Li 2 O and not more than 10 parts by weight of Ta 2 O 5 with respect to 100 parts by weight of said substances which are main components.
Claim 11
Dependent Claim
57 words
The microwave dielectric ceramic composition according to claim 1, which contains as first and second additives not more than 3 parts by weight of said Ga 2 O 3 and not more than 5 parts by weight of said Nb 2 O 5 with respect to 100 parts by weight of said substances which are main components.
Claim 12
Dependent Claim
57 words
The microwave dielectric ceramic composition according to claim 1, which contains as first and second additives not more than 3 parts by weight of said Ga 2 O 3 and not more than 5 parts by weight of said Ta 2 O 5 with respect to 100 parts by weight of said substances which are main components.
Claim 13
Dependent Claim
140 words
A microwave dielectric ceramic composition consisting essentially of as main components substances expressed by a composition formula of x·TiO 2 -y·ZrO 2 -z·SnO 2 , wherein 0.30≦x≦0.60, 0.25≦y≦0.60, and 0.025≦z≦0.20 when their molar fractions are taken as x, y and z such that x+y+z=1 and containing as a first additive at least one member selected from the group consisting of MnO, Al 2 O 3 , CuO, Li 2 O and Ga 2 O 3 and at least one second additive selected from the group consisting of Nb 2 O 5 and Ta 2 O 5 , and an amount opf ZnO which is effective to lower the sintering temperature of said composition, and wherein said first and second additives are present in respective amounts which are effective to raise a Q value of said composition to at least 5,000.
Claim 14
Dependent Claim
140 words
A microwave dielectric ceramic composition consisting essentially of as main components substances expressed by a composition formula of x·TiO 2 -y·ZrO 2 -z·SnO 2 , wherein 0.30≦x≦0.60, 0.25≦y≦0.60, and 0.025≦z≦0.20 when their molar fractions are taken as x, y and z such that x+y+z=1 and containing as a first additive at least one member selected from the group consisting of MnO, Al 2 O 3 , CuO, Li 2 O and Ga 2 O 3 and at least one second additive selected from the group consisting of Nb 2 O 5 and Ta 2 O 5 , and an amount opf ZnO which is effective to lower the sintering temperature of said composition, and wherein said first and second additives are present in respective amounts which are effective to raise a Q value of said composition to at least 5,000.
Claim 15
Dependent Claim
64 words
The microwave dielectric ceramic composition according to claim 12, which contains as first and second additives not more than 5 parts by weight of said MnO, not more than 10 parts by weight of said Nb 2 O 5 and not more than 5 parts by weight of said ZnO with respect to 100 parts by weight of said substances which are main components.
Claim 16
Dependent Claim
65 words
The microwave dielectric ceramic composition according to claim 12, which contains as first and second additives not more than 5 parts by weight of said Al 2 O 3 , 10 parts by weight of said Nb 2 O 5 and not more than 5 parts by weight of said ZnO with respect to 100 parts by weight of said substances which are main components.
Claim 17
Dependent Claim
64 words
The microwave dielectric ceramic composition according to claim 12, which contains as first and second additives not more than 5 parts by weight of said CuO, not more than 10 parts by weight of said Nb 2 O 5 and not more than 5 parts by weight of said ZnO with respect to 100 parts by weight of said substances which are main components.
Claim 18
Dependent Claim
66 words
The microwave dielectric ceramic composition according to claim 12, which contains as first and second additives not more than 5 parts by weight of said Li 2 O, not more than 10 parts by weight of said Nb 2 O 5 and not more than 5 parts by weight of said ZnO with respect to 100 parts by weight of said substances which are main components.
Claim 19
Dependent Claim
65 words
The microwave dielectric ceramic composition according to claim 12, which contains not more than 5 parts by weight of said MnO, not more than 10 parts by weight of said Ta 2 O 5 as first and second additives, respectively, and not more than 5 parts by weight of said ZnO with respect to 100 parts by weight of said substances which are main components.
Claim 20
Dependent Claim
65 words
The microwave dielectric ceramic composition according to claim 12, which contains as first and second additives not more than 5 parts by weight of said Al 2 O 3 , 10 parts by weight of said Ta 2 O 5 and not more than 5 parts by weight of said ZnO with respect to 100 parts by weight of said substances which are main components.
Claim 21
Dependent Claim
64 words
The microwave dielectric ceramic composition according to claim 12, which contains as first and second additives not more than 5 parts by weight of said CuO, not more than 10 parts by weight of said Ta 2 O 5 and not more than 5 parts by weight of said ZnO with respect to 100 parts by weight of said substances which are main components.
Claim 22
Dependent Claim
63 words
The microwave dielectric ceramic composition according to claim 12, which contains as first and second additives not more than 5 parts by weight of said Li 2 O, 10 parts by weight of said Ta 2 O 5 and not more than 5 parts by weight of said ZnO with respect to 100 parts by weight of said substances which are main components.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-21 | 1996-01-20 | 1996-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-21 | 2000-01-20 | 2000-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-21 | 2004-01-20 | 2004-07-21 | $7700.00 | Window Closed / Lapsed |