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US 6,432,325 B1Granted
Electrode
AssigneeTDK Corporation
InventorsMunemitsu Hamada, Akira Takeishi, Makoto Takahashi, Dai Matsuoka, Masatada Yodogawa, Hiraku Harada
Life of this patent
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Abstract
An electron-emitting electrode for discharge lamps etc. uses an electron-emitting material which contains a first metal component selected from Ba, Sr and Ca and a second metal component selected from Ta, Zr, Nb, Ti and Hf and also contains oxynitride perovskite. The electron-emitting material has restrained evaporation during electric discharge and a high resistance to ion sputtering.
Claims20
An electrode comprising an electron-emitting material which comprises:
- (i) an oxynitride perovskite, wherein said oxynitride perovskite comprises:
- (1) a first component selected from the group consisting of barium, strontium, calcium and mixtures thereof, and
- (2) a second component selected from the group consisting of tantalum, zirconium, niobium, titanium, hafnium and mixtures thereof;
- and
- (ii) at least one compound that comprises said second component in the form of a carbide, a nitride, or a carbide and a nitride.
2 more elements
An electrode comprising an electron-emitting material which comprises:
- (i) an oxynitride perovskite, wherein said oxynitride perovskite comprises:
- (1) a first metal element component selected from the group consisting of barium, strontium, calcium and mixtures thereof, and
- (2) a second metal element component selected from the group consisting of tantalum, zirconium, niobium, titanium, hafnium and mixtures thereof;
- and
- (ii) at least one element M selected from the group consisting of Mg, Sc, Y, La, V, Cr, Mo, W, Fe, Ni, and Al.
2 more elements
Dependencies are inferred from the claim text.