Boron carbide La, Sr and/or Ba hexaboride ceramic material for a

Details Boron carbide La, Sr and/or Ba hexaboride ceramic material for a Boron carbide La, Sr and/or Ba hexaboride ceramic material for a

1979-08-17

1981-05-05

Thomas, Earl C.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 732, C04B 3552, C04B 3558, C04B 3550

Patent

active

042656664

ABSTRACT:
Ceramic material for a low temperature direct heating electron gun cathode, wherein it is constituted by a mixed ceramic material of a hexaboride of a refractory material consisting of at least one substance with a high emissive power from the group consisting of La, Sr, and Ba hexaborides and a conductive material, boron carbide, having a resistivity higher than that of an emissive substance, the structure of the ceramic material resulting from its production by cofritting of the said components.

REFERENCES:
patent: 2647061 (1953-07-01), Lowe
patent: 3730826 (1973-05-01), Matchen et al.

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