Thin ceramic articles obtained by fusing and casting in a mold a composition of the system Al.sub.2 O-ZrO.sub.2 -SiO.sub.2 -K.sub.2 O which have good mechanical strength and abrasion resistance properties
US4910174A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1989 |
| Grant date | Mar 20, 1990 |
| Priority date | — |
| Expiry date | Feb 15, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/484
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to ceramic articles. It relates to an article made of ceramic material produced by fusing and casting in a mold a composition based on alumina, zirconia, silica and an alkali metal oxide, said article consisting of crystalline corundum and zirconia phases and of a vitreous phase, said zirconia being substantially in monoclinic form from the core to the skin of said article, and having, in at least one of its parts, a thickness lower than or equal to 30 mm and being intended for an application where mechanical strength and/or abrasion resistance are of primary importance, said composition consisting essentially, in % by weight based on the oxides, of: ______________________________________ Al.sub.2 O.sub.3 40-75 ZrO.sub.2 20-55 SiO.sub.2 5-20 Na.sub.2 O 0-2.7 K.sub.2 O 0.15-4.25 Fe.sub.2 O.sub.3 + TiO.sub.2 + CaO + MgO 0-2, ______________________________________ with the condition that the weight ratio ##EQU1## is between 0.07 and 0.14 inclusive. Application as micronizer disc, pump wear component and antiabrasion slab.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.