To provide a glass containing little B2O3, whereby when its powder is fired, its thermal expansion curve does not have an inflection point, a non-lead glass is provided containing, as represented by mol % based on the following oxides, from 35 to 41.5% of SiO2, from 8 to 25% of MgO, more than 27 to
To provide a glass containing little B2O3, whereby when its powder is fired, its thermal expansion curve does not have an inflection point, a non-lead glass is provided containing, as represented by mol % based on the following oxides, from 35 to 41.5% of SiO2, from 8 to 25% of MgO, more than 27 to 35% of CaO, from 0 to 2% of SrO, from 0 to 4% of BaO, from 5 to 15% of ZnO and from 4.5 to 10% of Al2O3, wherein the total content of these components is at least 97%, and when SrO and BaO are contained, the total content of SrO and BaO is at most 2%; as well as a non-lead glass containing, as represented by mol % based on the following oxides, from 39.5 to 41.5% of SiO2, from 10 to less than 13% of MgO, from 18 to 22% of CaO, more than 12 to 15% of SrO, from 0 to 1% of BaO, from 6 to 11% of ZnO and from 4.5 to 7% of Al2O3, wherein the total content of these components is at least 97%.
대표청구항▼
1. Non-lead glass comprising, as represented by mol % based on the following oxides, from 38 to 41.5% of SiO2, from 13 to 17% of MgO, 28 to 33% of CaO, from 0 to 2% of SrO, from 0 to 2.2% of BaO, from 5 to 12% of ZnO and from 4.5 to 7% of Al2O3, wherein the total content of these components is at le
1. Non-lead glass comprising, as represented by mol % based on the following oxides, from 38 to 41.5% of SiO2, from 13 to 17% of MgO, 28 to 33% of CaO, from 0 to 2% of SrO, from 0 to 2.2% of BaO, from 5 to 12% of ZnO and from 4.5 to 7% of Al2O3, wherein the total content of these components is at least 97%, and when SrO and BaO are contained, the total content of SrO and BaO is at most 2%; wherein the molar ratio of CaO to MgO is from 1.8 to 2.2. 2. The non-lead glass according to claim 1, wherein BaO is from 0.8 to 1.2%, and from 0.8 to 1.2% of La2O3 is contained. 3. The non-lead glass according to claim 1, wherein SiO2 is at most 41.2%. 4. The non-lead glass according to claim 1, wherein an alkali metal oxide is not contained, or an alkali metal oxide is contained in the total amount of at most 1%. 5. The non-lead glass according to claim 1, which has a softening point of higher than 800° C. 6. The non-lead glass according to claim 1, wherein when its powder is fired at 950° C., a fired product obtained has an average linear expansion coefficient of from 90×10−7 to 110×10−7/° C. at from 50 to 1,000° C. 7. The non-lead glass according to claim 1, wherein when its powder is fired at from 900 to 1,100° C., CaO—MgO—SiO2 crystal precipitates in a fired product obtained. 8. Sealing glass made of the non-lead glass as defined in claim 1, which has a sealing temperature of at least 900° C. 9. A glass paste, which contains a powder of the non-lead glass as defined in claim 1. 10. A green sheet, which contains a powder of the non-lead glass as defined in claim 1. 11. A process for producing a solid oxide fuel cell, which comprises a step of sealing members made of a ceramics or metal each other by means of a powder of the non-lead glass as defined in claim 1. 12. A solid oxide fuel cell having at least one sealed part at which members made of a ceramics or metal are sealed each other, wherein at least one sealed part is sealed with a fired product formed by firing the non-lead glass as defined in claim 1.
Yamanaka, Kazuhiko; Yokoyama, Yuki; Shimoyama, Toru, Glass frit for forming electrode, and electrically conductive paste for forming electrode and solar cell, utilizing same.
Suffner, Jens, Vitreous or at least partly crystallised sealing material, joint connection, barrier layer, and layer system comprising the sealing material and integration thereof into components.
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