High zirconia fused cast refractory
US9056797B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2013 |
| Grant date | Jun 16, 2015 |
| Priority date | — |
| Expiry date | Dec 25, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
To provide a high zirconia fused cast refractory which has high corrosion resistance to molten glass and which is scarcely susceptible to cracking during its production. A high zirconia fused cast refractory which has a chemical composition comprising from 96.5 to 98.5 mass % of ZrO2, from 0.8 to 2.7 mass % of SiO2, from 0.04 to 0.35 mass % in a total amount of Na2O and K2O, and from 0.02 to 0.18 mass % of B2O3, wherein contents of Na2O, K2O and B2O3 satisfy the relation of the following formula (1) at the same time:0.03≧CB2O3−(CNa2O+CK2O) (1)wherein CNa2O is the content of Na2O, CK2O is the content of K2O, and CB2O3 is the content of B2O3, and each of these contents represents mass % in the refractory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.