Polymer derived ceramic fibers having improved thermal stability

Details Polymer derived ceramic fibers having improved thermal stability Polymer derived ceramic fibers having improved thermal stability

1991-12-16

1993-08-24

Ryan, Patrick J.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428364, 501 32, 501 35, 501 56, 501 95, 501 97, 264 22, 264 65, 264DIG19, C01B 3136, C07F 708

Patent

active

052387429

ABSTRACT:
The present invention relates to ceramic fibers of the Si-C-N-O series with a diameter less than about 20 micrometers. It has been unexpectedly found that the thermal stability of these fibers can be increased by minimizing the impurity content, primarily the content of metals or metallic compounds. Such fibers with low levels of contaminants retain greater than about 60 percent of their initial tensile strength when subjected to temperatures of 1300.degree.-1400.degree. C. for at least 30 minutes in a non-oxidative environment.

REFERENCES:
patent: 4283376 (1981-08-01), Yajima et al.

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