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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

  • US 4,352,889 A
  • Filed: 09/14/1981
  • Issued: 10/05/1982
  • Est. Priority Date: 09/21/1978
  • Status: Expired due to Term
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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