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US 8,163,377 B2Granted
High temperature resistant fibres
AssigneeThe Morgan Crucible Company plc
InventorsRonald Corbett Wainwright, David Hywel Thomas, Simon Paul Oliver
Life of this patent
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Abstract
Thermal insulation comprises sol-gel formed fibers comprising 10 to 99 mol % of a refractory base composition, and 1 to 90 mol % of a component selected from earth metal oxides, alkali metal oxides, and mixtures thereof, and wherein said alkaline earth metal oxides if present comprise one or more of calcium oxide, strontium oxide, barium oxide or a mixture thereof. The refractory base comprises SiO2 and Al2O3.
Claims48
Sol-gel formed fibres comprising in mol %:
- Al2O3 and SiO2 in such amounts that Al2O3+SiO2 is in the range of 50% to 99% and in which Al2O3 is present in amounts of at least 25 mol %;
- and
- one or more alkaline earth oxides and/or alkali metal oxides comprising in total 5%-30%, wherein the alkaline earth metal oxide comprises one or more of calcium oxide, strontium oxide, barium oxide or a mixture thereof.
Sol-gel formed fibres comprising in mol %:
- Al2O3 and SiO2 in such amounts that Al2O3+SiO2 is in the range 50% to 99% and in which Al2O3 is present in amounts of at least 25 mol %;
- and
- one or more alkaline earth oxides and/or alkali metal oxides comprising CaO, SrO, or mixtures thereof and wherein CaO is less than 25 mol %.
Dependencies are inferred from the claim text.