Tubular discharge envelope composed of a polycrystalline transpa

Details Tubular discharge envelope composed of a polycrystalline transpa Tubular discharge envelope composed of a polycrystalline transpa

1978-11-24

1980-07-29

Carter, Herbert T.

Receptacles

Envelope for electric lamp or similar device

Tv tube

106 734, 423625, H01K 128, H01J 6130, C01F 702

Patent

active

042146666

ABSTRACT:
A tubular discharge envelope and a high-pressure vapor discharge lamp using the same are disclosed. The envelope is composed of a polycrystalline transparent alumina having an average crystal grain size of 20-60 .mu.m and crystal grains of 20 .mu.m or less which occupy not more than 30% per unit area of the envelope.

REFERENCES:
patent: 3026177 (1962-03-01), St. Pierre et al.
patent: 3026210 (1962-03-01), Coble
patent: 3792142 (1974-02-01), Kobayashi et al.
patent: 3899560 (1975-08-01), Sellers et al.
patent: 3943324 (1976-03-01), Haggerty
patent: 4150317 (1979-04-01), Laska et al.
Cahoon et al., "Journal of Amer. Ceramic Soc.", vol. 39, pp. 337-344, 1956.

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