The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 2010
Filed:
Dec. 16, 2008
Nobuo Tomura, Tokyo, JP;
Shigeo Endo, Tokyo, JP;
Yasuo Misu, Tokyo, JP;
Saint-Gobain TM K.K., Tokyo, JP;
Abstract
A high-zirconia cast refractory material which contains 85-95 wt % of ZrO, 4-12 wt % of SiO, 0.1 to less than 0.8 wt % of AlO, less than 0.04 wt % of NaO, 0.01-0.15 wt % of KO, 0.1-1.5 wt % of BO, 0.01-0.2 wt % of CaO, less than 0.4 wt % of BaO, less than 0.2 wt % of SrO, 0.05-0.4 wt % of YO, and 0.3 wt % or less of FeOand TiOtogether, but does not substantially contain CuO and PO(less than 0.01 wt %), such that the molar ratio of the glass-forming oxides (such as SiOand BO) to the glass-modifying oxides (such as NaO, KO, CaO, MgO, SrO, and BaO) is 20-100, said refractory material having an electric resistance being 200 Ω·cm or higher after standing for 12 hours at 1500° C.