Heat resistant glass fiber composition

Details Heat resistant glass fiber composition Heat resistant glass fiber composition

1982-07-19

1984-07-24

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 70, 501 73, C03C 1300

Patent

active

044618409

ABSTRACT:
The present invention concerns glass compositions capable of being attenuated in the form of fibers.
These glass fibers comprise the following oxides in the percentages by weight: SiO.sub.2 :37 to 48%; Al.sub.2 O.sub.3 :17 to 25%; CaO:23 to 33%; MgO:0.1 to 7%; Fe.sub.2 O.sub.3 :0.1 to 3%; Na.sub.2 O:2 to 8%; K.sub.2 O:0.1 to 7%, the sum of the percentages of earthalkaline oxides (CaO and MgO) being less than or equal to 34%, and the sum of the alkaline oxides (Na.sub.2 O and K.sub.2 O) being greater than 5%.
The invention is applicable to the manufacture of products subjected to elevated temperatures, for instance, products used for insulation purposes, even when such products may be subjected to a temperature as high as 700.degree. C.

REFERENCES:
patent: 3736162 (1973-05-01), Chvalovsky et al.
patent: 3799836 (1974-03-01), Rogers et al.
patent: 3900329 (1975-08-01), Grubb et al.
patent: 4365984 (1982-12-01), Gee
Chemical Abstracts, vol. 89, 1978, Ref. No. 184615w, p. 285-Columbus, Ohio (US), & JP-A-78 56 207, (Nippon Sheet Glass Co., Ltd.), (May 22, 1978).
Chemical Abstracts, vol. 88, 1978, Ref. No. 77981v, p. 246-Columbus, Ohio (US), & SU-A-581 104, (V. B. Zaporozhets et al.), (Nov. 25, 1977).

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