Powder having a negative coefficient of linear thermal expansion and a composition containing the same
AssigneeNgk Spark Plug Co., Ltd.
InventorsAkio Takami, Kazuo Kondo
Life of this patent
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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 .beta.-eucryptite particle having on the surface thereof a layer of tin oxide, titanium oxide, and/or zirconium oxide.
Claims6
A sealing composition having a low expansivity which consisting essentially of 50% by weight or less of a .beta.-eucryptite particle 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.mu. or less;
- and a resin.
Dependencies are inferred from the claim text.