Cu-Al-Mg合金的次級電子發(fā)射機(jī)理的探討
MECHANISM OF SECONDARY ELECTRON EMISSION OF Cu-Al-Mg ALLOY
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摘要: 正 一、前言 Cu-Al-Mg合金是一種新型的次級電子發(fā)射材料。這種合金最大的優(yōu)點(diǎn)是不用專門活化處理就具有優(yōu)良的次級發(fā)射性能。 眾所周知,金屬的次級發(fā)射系數(shù)是比較低的,最高也只有1.8;氧化物則具有較高的次級發(fā)射系數(shù),如MgO的發(fā)射系數(shù)可大于8。合金型次級發(fā)射體,如Cu-Be等經(jīng)過專門
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關(guān)鍵詞:
Abstract: The slices of Cu-Al-Mg alloy with thickness of 0.1 mm are prepared. Some samples are respectively activated at the tempertures of 590℃ and 620℃. The seeondary emission factors () are determined. The composition of the surface and the electron binding-energy are studied by means of XPS and ABS. It is proved that the oxide layer consisting of Al2O3 and MgO can be formed naturally at room temperature. This oxide layer exhibits lower electron binding-energy, high and satisfactory stability. -
國外電子器件,1963年,第5期,第46頁.[2]蘇聯(lián)專利,No 493831, 1982, 2.[3]潘奇漢,Cu-Al-Mg合金冷陰極材料研究報告,北京有色金屬研究總院內(nèi)部資料,1934.[4]北京師范大學(xué),簡明化學(xué)手冊,北京出版社,1980,第126頁.[5]東北工學(xué)院,無機(jī)物熱力學(xué)數(shù)據(jù),教學(xué)講義,1978.[6]J. Dresner and B. Goldstein, J. Appl. Phys., 47 (1976), 1038. -
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