Patent ID: 6190579
Filing Date: 2001-02-20
Classification: B82Y,H01B,H01J

Abstract:
A composite electron emission material, comprising:a refractory metal matrix selected from the group consisting of tungsten, molybdenum, tantalum, rhenium, and mixtures and alloys thereof;an electron emission material contained in the refractory metal matrix, the electron emission material being selected from the group consisting of ternary oxides of a Group IIIB element selected from Sc, Y, and the lanthanides La through Lu, and a Group IIA element selected from Be, Mg, Ca, Sr, and Ba, and quaternary oxides of a Group IVB element selected from Hf, Zr, and Ti, a Group IIIB element selected from Sc, Y, and the lanthanides La through Lu, and a Group IIA element selected from Be, Mg, Ca, Sr, and Ba.