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:
Feb. 20, 2018
Filed:
Nov. 26, 2014
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 having long time durability with less cracking during production and in the course of temperature rising, excellent in productivity, less forming zircon crystals in the refractory itself and even in contact with molten glass, excellent in bubble foamability to molten glass, less generating cracks even undergoing heat cycles during operation of a glass melting furnace. A high zirconia electrically fused cast refractory comprises, as chemical component, 85 to 95% by weight of ZrO, 0.4 to 2.5% by weight of AlO, 3.5 to 10.0% by weight of SiO, 0.05% by weight or more of NaO, 0.05 to 0.7% by weight of NaO and KO in total, 0.01 to 0.04% by weight of BO, 0.1 to 3.0% by weight of SrO or BaO when one of BaO and SrO is contained, 0.1% by weight or more of SrO and 0.1 to 3.0% by weight of SrO and BaO in total when both of BaO and SrO are contained, 0.01 to 0.2% by weight of CaO, 0.1% by weight or less of MgO, 0.01 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.