High temperature stable continuous filament glass ceramic fibers
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.
Claims16
A process for the production of high temperature stable glass fibers, comprising a) melting a ceramic powder feed to form a melt, and b) forming said melt into filaments, wherein said ceramic powder feed consists 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.ltoreq..times..ltoreq.2, and
- v) 0 to about 5 mole percent ZrO.sub.2.
A process for the production of high temperature stable continuous filament glass fibers, comprising a) melting a ceramic powder feed to form a melt, and
- b) drawing said melt into continuous filaments,
- wherein said ceramic powder feed consists 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.ltoreq..times..ltoreq.2, and
- v) 0 to about 5 mole percent ZrO.sub.2.
Dependencies are inferred from the claim text.