Tin oxide, titanium oxide and/or zirconium oxide coated .beta.-eucryptite particles having a negative coefficient of linear thermal expansion and sealing compositions containing said particles
First Claim
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1. A sealing composition having low expansivity which consists essentially of up to about 30% by weight of β
- -eucryptite particles and a lead borate glass, said β
-eucryptite particles having on the surface thereof a single layer of or multiple layers of a member selected from the group consisting of tin oxide, titanium oxide, zirconium oxide and a mixture of two or more of said oxides, said oxides being present in a thickness of about 1 micron or less.
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Abstract
A powder having a negative coefficient of linear thermal expansion and sealing compositions containing the same are disclosed wherein the powder is a β-eucryptite particle having on the surface thereof a layer of tin oxide, titanium oxide, and/or zirconium oxide.
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8 Claims
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1. A sealing composition having low expansivity which consists essentially of up to about 30% by weight of β
- -eucryptite particles and a lead borate glass, said β
-eucryptite particles having on the surface thereof a single layer of or multiple layers of a member selected from the group consisting of tin oxide, titanium oxide, zirconium oxide and a mixture of two or more of said oxides, said oxides being present in a thickness of about 1 micron or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- -eucryptite particles and a lead borate glass, said β
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