Method for preparing electron emissive coatings

Details Method for preparing electron emissive coatings Method for preparing electron emissive coatings

1974-07-10

1976-04-20

Padgett, Benjamin R.

Compositions

Electrically conductive or emissive compositions

Metal compound containing

252500, 423593, H01B 106

Patent

active

039518744

ABSTRACT:
An improved emissive tantalate coating for fluorescent lamps provides long operational lamp life and low lamp end discoloration. The emissive tantalate has the composition Ba.sub.5 Ca.sub.4 Ta.sub.2 O.sub.14 and is applied in powder form to standard fluorescent lamp electrodes.

REFERENCES:
patent: 2724070 (1955-11-01), Heine et al.
patent: 2985548 (1961-05-01), Blickwedel et al.
patent: 3464785 (1969-09-01), Galasso
patent: 3718831 (1973-02-01), Butter et al.
patent: 3755553 (1973-08-01), Kutolin et al.
patent: 3758809 (1973-09-01), Menelly et al.
patent: 3766423 (1973-10-01), Menelly
patent: 3798492 (1974-03-01), Menelly
patent: 3837909 (1974-09-01), Menelly
patent: 3842469 (1974-10-01), Menelly
Journal of Physical Chemistry 67, 533-534 (1963).

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