公开(公告)号：US10815155B2

公开(公告)日：2020-10-27

申请号：US16124913

申请日：2018-09-07

Applicant: AGC CERAMICS CO., LTD.

Inventor： Kenji Matano ,  Nobuo Tomura

IPC: C04B35/484 ,  C03B5/43 ,  C04B35/05 ,  C04B35/48 ,  F27D1/00 ,  C04B35/66 ,  C04B35/657

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 ZrO2, 0.8 to 2.7 mass % of SiO2, 0 to 0.2 mass % of Na2O, 0.21 to 1 mass % of K2O, 0.1 to 0.4 mass % of Al2O3, and does not substantially contain B2O3, in terms of oxide, as a chemical composition, wherein contents of the Na2O and the K2O satisfy a relation of following Formula (1) 0.15 mass %≤CK2O/2+CNa2O≤0.6 mass %  (1) where CK2O is the content of K2O and CNa2O is the content of Na2O, and each of the contents is expressed by mass % in the refractory.

公开(公告)号：US20190077714A1

公开(公告)日：2019-03-14

申请号：US16124913

申请日：2018-09-07

Applicant: AGC Ceramics Co., Ltd.

Inventor： Kenji Matano ,  Nobuo Tomura

IPC: C04B35/484 ,  C03B5/43

CPC classification number: C04B35/484 ,  C03B5/43 ,  C04B35/05 ,  C04B35/48 ,  C04B35/657 ,  C04B35/66 ,  C04B2235/3201 ,  C04B2235/3217 ,  C04B2235/3418 ,  C04B2235/6565 ,  C04B2235/72 ,  C04B2235/96 ,  C04B2235/9607 ,  C04B2235/9669 ,  F27D1/0006

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 ZrO2, 0.8 to 2.7 mass % of SiO2, 0 to 0.2 mass % of Na2O, 0.21 to 1 mass % of K2O, 0.1 to 0.4 mass % of Al2O3, and does not substantially contain B2O3, in terms of oxide, as a chemical composition, wherein contents of the Na2O and the K2O satisfy a relation of following Formula (1) 0.15 mass %≤CK2O/2+CNa2O≤0.6 mass %  (1) where CK2O is the content of K2O and CNa2O is the content of Na2O, and each of the contents is expressed by mass % in the refractory.