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US 12,679,762 B2Granted
Low bio-persistent high temperature resistant inorganic fibers
AssigneeUnifrax I LLC
InventorsDonghui Zhao, Jason M. Hamilton, Karen L. Hanson, Mauricio Munhoz De Souza
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Abstract
A high temperature resistant inorganic fiber includes 72 to 77.3 weight percent silica; 10.2 to 15 weight percent magnesia; 12.4 to 17 weight percent calcia; 0 to 1.5 weight percent alumina; and 0 to 0.6 weight percent total alkali oxides; the fiber has a use temperature of at least 1260° C.; the fiber may exhibit a shrinkage of greater than 5% after exposure to a temperature of 1400° C. for 24 hours; and the fiber may have a melt temperature of less than 1400° C.
Claims9
A high temperature resistant inorganic fiber comprising:
- 72 to 77.3 weight percent silica;
- 10.5 to 15 weight percent magnesia;
- 12.5 to 17 weight percent calcia;
- 0 to 1.5 weight percent alumina;
- and
- 0.1 to 0.6 weight percent total alkali oxides;
- wherein the fiber has a use temperature of at least 1260° C. and exhibits a shrinkage of less than 3% after exposure to a temperature of 1260° C. for 24 hours;
- wherein the fiber exhibits a shrinkage of greater than 5% after exposure to a temperature of 1400° C. for 24 hours;
- and
- wherein the fiber does not comprise strontia.
7 more elements
Dependencies are inferred from the claim text.