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. 21, 2017
Filed:
Mar. 19, 2014
Krosakiharima Corporation, Fukuoka, JP;
Katsumi Morikawa, Fukuoka, JP;
Akinari Sasaki, Fukuoka, JP;
Taro Makino, Fukuoka, JP;
Ling Li, Fukuoka, JP;
KROSAKIHARIMA CORPORATION, Fukuoka, JP;
Abstract
A refractory material contains: 40 mass % or more of MgO; 4 to 30 mass % of a free carbon component; and one or more of BO, PO, SiOand TiO, in a total amount of 0.3 to 3 mass %, with the remainder being at least one other type of additional refractory component. A void layer exists in an interface between a carbon-containing matrix microstructure residing at least on opposite sides of a maximum-size one of a plurality of MgO-containing particles in the refractory material, and the maximum-size MgO-containing particle. A sum of respective thicknesses of the void layer at two positions on the opposite sides is 0.2 to 3.0% of a ratio with respect to particle size of the maximum-size MgO-containing particle. An inorganic compound of MgO and the one or more of BO, PO, SiOand TiOexists entirety or partially in a surface of each of the MgO-containing particles.