| Project/Area Number |
06555086
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | Muroran Institute of Technology |
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Principal Investigator |
ADACHI Hiroshi Muroran institute of Technology, Department of Electrical and Electronic engineering, Professor, 工学部, 教授 (80005446)
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| Co-Investigator(Kenkyū-buntansha) |
NAKANE Hideaki Muroran institute of Technology, Department of Electrical and Electronic enginee, 工学部, 助教授 (20237332)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1995: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1994: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | Transition metal nitrides / Fabrication of fine needle / Field emission properties / Stability of field emission current / 遷移金属窒化物 / 微小針の製作 / 還移金属窒化物 |
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| Research Abstract |
Field emitters of NbN,Nb_2N,TiN,and ZrN were fabricated by nitriding elemental metal needles. The nitriding was carried out by heating metal needles in an ammonia gas.
Before operating the field emitters, they are flash heated for several seconds. Their field emission properties changed with the increase of the flashing temperature. At the beginning the current fluctuation was fundamentally step-and spike-like. However, it changed to random-like when flashed higher than a certain temperature where field emission patterns changed.
The NbN emitters, which had been flash heated at 900ﾟC,showed the most stable field emission current among the nitride emitters examined here.
It is revealed by using of AES (Auger Electron Spectroscopy) that the field emission properties are largely affected by the concentric components at the emitter surface. Deficiency of nitrogen degrades the emission properties very much and occurred due to a flash heating higher than a temperature where the change of the emission pattern was observed.
It is concluded that the nitride emitters gave stable emission when flash heated at a relatively low temperature, suggesting that the deficiency of nitrogen at the emitter surface does the important role in the stable operation.
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