Process for manufacturing boron nitride fiber felt using a Fourd

Details Process for manufacturing boron nitride fiber felt using a Fourd Process for manufacturing boron nitride fiber felt using a Fourd

1980-03-28

1982-01-05

Chin, Peter

Paper making and fiber liberation

Processes and products

Utilizing non-aqueous suspending medium

162146, 162157R, 162201, 162206, 162207, 264 65, 264319, 264332, D21H 518

Patent

active

043092454

ABSTRACT:
A process is disclosed for producing a non-woven boron nitride (BN) fiber felt. Boron nitride fibers are blended with a lesser amount of boron oxide fibers and a nondissolving, anhydrous liquid medium to form a homogeneous slurry. The slurry is deposited on the moving screen of a Fourdrinier machine where the liquid content is gradually reduced until sufficient fiber to fiber contact is made to provide internal cohesiveness, to form a felt. The felt may be further treated by heating it in an anhydrous gas atmosphere at a sufficient temperature to soften the boron oxide binder to fuse the BN fibers together, and then converting the interstitial boron oxide into boron nitride. The resulting boron nitride-bonded boron nitride felt may be used as an electric cell separator in a lithium sulfide battery.

REFERENCES:
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patent: 3816242 (1974-06-01), Selover et al.
patent: 3837997 (1974-09-01), Economy et al.
patent: 4075276 (1978-02-01), Economy et al.
patent: 4125450 (1978-11-01), Degueldre
patent: 4130631 (1978-12-01), Hamilton

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