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US 9,048,056 B2Granted
Glass composition and covering and sealing members using same
AssigneeHitachi Powdered Metals Co., Ltd.
InventorsKei Yoshimura, Shinichi Tachizono, Yuji Hashiba, Takashi Naito, Takuya Aoyagi
Life of this patent
Estimating the term…
Abstract
A glass composition according to the present invention comprises: transition metals; phosphorus; barium; and zinc, the transition metals including: vanadium; and tungsten and/or iron, the glass composition not containing substances included in the JIG level A and B lists, an softening point of the glass composition being from 430 to 530° C., an average linear expansion coefficient of the glass composition being from 6 to 9 ppm/° C. at temperatures from 30 to 250° C.
Claims20
A glass composition, comprising:
- transition metals;
- phosphorus (P);
- barium (Ba);
- and zinc (Zn), the transition metals including;
- vanadium (V) and at least one of tungsten (W) and iron (Fe), the glass composition not containing substances included in the JIG level A and B lists and not containing alkali metals, a softening point of the glass composition being from 430 to 530° C., an average linear expansion coefficient of the glass composition being from 6 to 9 ppm/° C. at temperatures from 30 to 250° C.
2 more elements
A glass composition, comprising:
- transition metals;
- phosphorus (P);
- barium (Ba);
- and zinc (Zn), the transition metals including vanadium (V) and at least one of tungsten (W) and iron (Fe), the glass composition containing, on the oxide basis:
- 25 to 43 mass % of V2O5;
- 0 to 25 mass % of WO3;
- 0 to 10 mass % of Fe2O3;
- 23 to 30 mass % of P2O5;
- 5 to 20 mass % of BaO;
- and 5 to 15 mass % of ZnO, a total content of the V2O5, the WO3, and the Fe2O3 being within a range from 40 to 60 mass %, the glass composition not containing substances included in the JIG level A and B lists and not containing alkali metals.
7 more elements
Dependencies are inferred from the claim text.