High temperature stable continuous filament glass ceramic fiber
AssigneeUnifrax Corporation
InventorsJohn D. TenEyck, Thomas M. Clere, James Olson, Steven Waisala
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Abstract
Composition and process for the preparation of high temperature stable continuous glass ceramic fibers with an upper temperature use limit of 2300.degree. F. are provided. The compositional formulation, in mole percent, is 62-85% SiO.sub.2, 9.5-20% Al.sub.2 O.sub.3, 5-15.5% MgO, 0.5-5% TiO.sub.x, and 0-5% ZrO.sub.2. The continuous fibers are prepared by an economical direct melt method, and demonstrate high tensile strength, high Young's modulus, and low linear thermal shrinkage characteristics.
Claims23
High temperature stable glass fibers consisting essentially of
- i) about 67.5 to about 85 mole percent SiO.sub.2,
- ii) about 9.5 to about 20 mole percent Al.sub.2 O.sub.3,
- iii) about 5 to about 15.5 mole percent MgO,
- iv) about 0.5 to about 5 mole percent TiO.sub.x, wherein 0<x<2, and
- v) 0 to about 5 mole percent ZrO.sub.2.
High temperature stable continuous filament glass fibers consisting essentially of
- i) about 67.5 to about 85 mole percent SiO2,
- ii) about 9.5 to about 20 mole percent Al.sub.2 O.sub.3,
- iii) about 5 to about 15.5 mole percent MgO,
- iv) about 0.5 to about 5 mole percent TiO.sub.x, wherein 0<x<2, and
- v) 0 to about 5 mole percent ZrO.sub.2.
Dependencies are inferred from the claim text.