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:
Sep. 05, 2017
Filed:
Mar. 02, 2015
Saint-gobain TM K.k., Tokyo, JP;
Hiroshi Sugiyama, Tokyo, JP;
Toshimitsu Kuboki, Tokyo, JP;
Itaru Hashimoto, Tokyo, JP;
Yasuo Misu, Tokyo, JP;
SAINT-GOBAIN TM K.K., Tokyo, JP;
Abstract
A high zirconia electrically fused cast refractory of high electric resistance having long time durability, less suffering from cracking during production and upon temperature rising, excellent in productivity, less forming zircon crystals even upon heating the refractory in itself and when the refractory is in contact with molten glass, generating less cracks even when undergoing heat cycles during operation of a glass melting furnace is provided. A high zirconia electrically fused cast refractory has, as chemical components, 85 to 95% by weight of ZrO, 0.1 to less than 0.8% by weight of AlO, 3.5 to 10.0% by weight of SiO, less than 0.05% by weight of NaO and KO in total, 0.1 to 1.5% by weight of BO, 0.1% by weight or less of MgO, 0.01 to 0.2% by weight of CaO, in the case where any one of BaO and SrO is contained, from 0.05 to 3.0% by weight of BaO or 0.01 to 3.0% by weight of SrO, or in the case where both of them are contained, 0.01% by weight or more of SrO and from 0.01% to 3.0% by weight in total of SrO and BaO, 0.1 to 0.7% by weight of SnO, 0.3% by weight or less of FeOand TiOin total, less than 0.01% by weight of PO, and less than 0.01% by weight of CuO.