Low-expansion ceramics and method of producing the same
CA 1135727 A · Owner: Ngk Insulators, Ltd. · Inventors: Matsuhisa, Tadaaki; Oda, Isao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to low-expansion ceramics, characterized in that chemical composition of the ceramics consists of 1.2 to 20% by weight of magnesia (MgO), 6.5 to 68% by weight of alumina (A?2O3 ) 19 to 80%, by weight of titanium in terms of titanium oxide (TiO2) 1 to 20% by weight of silica (SiO2), and 0.5 to 20% by weight of iron in terms of ferric oxide (Fe2O3); that major component of crystalline phase thereof is a solid solution of magnesium oxide-aluminum oxide-titanium dioxide-silicon oxide-iron oxide; and that the ceramics has a coefficient of thermal expansion of not more than 20x10-7 (l/°C) in a temperature range of 25°C to 800°C a four-point flexural strength of not …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 16, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 1999.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.