Method of producing an insulating material for coating cathode h

Details Method of producing an insulating material for coating cathode h Method of producing an insulating material for coating cathode h

1973-11-23

1976-03-02

Ansher, Harold

Compositions

Electrolytes for electrical devices

29611, 75 68R, 75138, 75176, 174137B, 423114, 423411, 423600, 423606, 423625, C01F 702, C01G 4100, C04B 4300

Patent

active

039417077

ABSTRACT:
A method of producing an aluminum oxide and tungstate powder for insulating cathode heaters includes mixing a finely divided aluminum oxide powder with ammonium tungstate, rinsing out excess ammonium tungstate, drying the mixture and heating in a nitrogen-hydrogen atmosphere to about 700.degree.C.

REFERENCES:
patent: 914187 (1909-03-01), Rinman
patent: 1752599 (1930-04-01), Kjellgren
patent: 3121035 (1964-02-01), Heinze
patent: 3396112 (1968-08-01), Burrows
patent: 3497455 (1970-02-01), Ahr
patent: 3839181 (1974-10-01), Degueldre et al.

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