Ceramic fiber yarn, and a method of and a spinning machine for m

Details Ceramic fiber yarn, and a method of and a spinning machine for m Ceramic fiber yarn, and a method of and a spinning machine for m

1994-02-04

1996-01-23

Bonner, C. Melissa

Compositions: ceramic

Ceramic compositions

Refractory

501128, 501154, 428364, 428401, D02G 306, C04B 3510

Patent

active

054864976

ABSTRACT:
The present invention relates to a ceramic fiber yarn, which has higher weaving and knitting performance. The ceramic fiber yarn comprises a group of filaments, the filaments being made by the steps of spinning mother liquid, which comprises colloidal silica and basic aluminum chloride, and firing, the filaments comprising 67-75 wt % of alumina and 25-33 wt % of silica and mainly having polycrystalline transition alumina, and is characterized in that: the loop strength of each the filament, which is measured by a wire having diameter of 0.5 mm, is at or greater than 2.5.times.10.sup.-2 N (N: Newton); and the crystal structure of the filament substantially changes to polycrystalline mullite after heating for 30 minutes at the temperature of 1,400.degree. C.

REFERENCES:
patent: 4047965 (1977-09-01), Karst et al.
patent: 4523427 (1985-06-01), Carr

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