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:
Oct. 27, 2020
Filed:
Sep. 07, 2018
Agc Ceramics Co., Ltd., Minato-ku, JP;
Kenji Matano, Takasago, JP;
Nobuo Tomura, Chiyoda-ku, JP;
AGC CERAMICS CO., LTD., Minato-ku, JP;
Abstract
To provide a high-zirconia electrocast refractory in which occurrence of cracks in manufacture and occurrence of cracks in use as a furnace material is further reduced while maintaining extremely high corrosion resistance to molten glass. The high-zirconia electrocast refractory contains 96.7 to 98.5 mass % of ZrO, 0.8 to 2.7 mass % of SiO, 0 to 0.2 mass % of NaO, 0.21 to 1 mass % of KO, 0.1 to 0.4 mass % of AlO, and does not substantially contain BO, in terms of oxide, as a chemical composition, wherein contents of the NaO and the KO satisfy a relation of following Formula (1)0.15 mass %≤C/2+C≤0.6 mass %  (1)where Cis the content of KO and Cis the content of NaO, and each of the contents is expressed by mass % in the refractory.