希土類六硼化物の電界放射基本特性について
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概要
- 論文の詳細を見る
Field emission patterns and emission characteristics concerning single crystal tips of LaB<SUB>6</SUB>, CeB<SUB>6</SUB>, PrB<SUB>6</SUB>, NdB<SUB>6</SUB> and SmB<SUB>6</SUB> were studied. The (001) oriented cathode tips were prepared by means of the flux technique and the electrolytic etching method. MeB<SUB>6</SUB> cathodes showed symmetrical field emission patterns either by flashing operation with some definite temperature range (for example, 1400-1500°C for a La, cathode), or by field desorption cleaning. These emitters displayed characteristic patterns easily correlated with the body-centered cubic crystal structure. Most crystals gave (001) built-up patterns by the heat treatment of 800°C× 30-40 min. with the anode voltage applied. Emission characteristics for a period of about an hour after the flashing treatment were mainly governed by adsorption, desorption and migration of residual gas molecules on the cathode surface.
- 日本真空協会の論文