Thermally-insulating components made of thermally-stabilized refractory ceramic fibers
US5631084A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1994 |
| Grant date | May 20, 1997 |
| Priority date | — |
| Expiry date | Dec 21, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2949
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a refractory thermally-insulating component consisting essentially of refractory ceramic fibers which are mechanically combined with one another, the composition of which comprises at least 97.5% by weight of alumina, silica and zirconia in total, wherein: PA1 a) no organic or inorganic binder binds the fibers to one another; PA1 b) the fibers have the following chemical composition, as % by weight: PA2 Al.sub.2 O.sub.3 : 33-45% PA2 SiO.sub.2 : 41-53% PA2 ZrO.sub.2 : 5.5-17% PA2 MgO: 0.02-2% other oxides:<0.50% with Fe.sub.2 O.sub.3 +TiO.sub.2 .ltoreq.0.20% and Na.sub.2 O+CaO+K.sub.2 O.ltoreq.0.30%; PA1 c) the said fibers homogeneously have, throughout the entire body of the component, a degree of crystallinity of not less than 30% and not more than 64%, the crystals present being essentially formed of mullite crystals and of quadratic zirconia; and PA1 d) the said component has a linear shrinkage of no more than 3% after being held for 24 hours at 1450.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.