Production of .beta.-alumina ceramic tubes

Details Production of .beta.-alumina ceramic tubes Production of .beta.-alumina ceramic tubes

1972-05-09

1976-04-13

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

136153, 264 66, F27B 914

Patent

active

039504638

ABSTRACT:
Tubes of .beta. alumina ceramic are produced by forming a tube of compressed finely divided powder material, e.g. finely divided crystalline .beta. alumina or finely divided powders which together will form on heating the required ceramic. This tube is passed at a uniform rate through an electric inductive furnace of open-ended tubular form having a short zone at 1600.degree.-1900.degree.C so that the tube is rapidly raised to the sintering temperature and, after a short period in the sintering zone is rapidly cooled.

REFERENCES:
patent: 1138674 (1915-05-01), Little et al.
patent: 2968551 (1961-02-01), North et al.
patent: 3446677 (1969-05-01), Tennenhouse
patent: 3468719 (1969-09-01), Tennenhouse
patent: 3475225 (1969-10-01), Tennenhouse
patent: 3533143 (1970-10-01), Varga
patent: 3625773 (1971-12-01), Charles

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