鋁酸鹽鋇鎢陰極中摻氧化鈣和氧化鈧的作用機(jī)理

吳兆皓

鋁酸鹽鋇鎢陰極中摻氧化鈣和氧化鈧的作用機(jī)理

吳兆皓

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出版歷程
- 收稿日期: 1985-12-02
- 修回日期: 1987-03-17
- 刊出日期: 1987-07-19

STUDY ON THE ROLE OF CALCIUM OXIDE AND SCANDIUM OXIDE IN THE IMPREGNATED BARIUM ALUMINATE CATHODE

Wu Zhaohao

摘要

摘要: 各種鋁酸鹽鋇鎢陰極的發(fā)射物質(zhì)中存在著2BaOCaOAl2O3和可利用氧化鋇的共同成分。氧化鈣的作用在于參予組成了2BaOCaOAl2O3相成分,穩(wěn)定了可利用氧化鋇。在摻氧化鈧的發(fā)射物質(zhì)5BaO3CaO2Al2O30.6Sc2O3中,氧化鈧的作用則在于它和鋁酸鹽中的可利用氧化鋇結(jié)合為2BaOSc2O3,成為電子發(fā)射源氧化鋇或鋇原子的載體,它起控制和補(bǔ)充發(fā)射源的作用。這個機(jī)理得到實(shí)驗(yàn)證實(shí)。
Abstract: The role of calcium oxide in the barium aluminate and that of calcium oxide and scandium oxide both doped in the impregnated barium aluminate cathode are analytically studied. The results indicate that there are common consitituents, i.e. 2BaO CaO Al2O3 and utilizable barium oxide in the emission substances of various impregnated barium-calcium-aluminate cathodes. The calcium oxide in the barium aluminates participates in constituting 2BaOCaOAl2O3. It makes the utilizable barium oxide stable. The scandium oxide doped in the barium-calcium-aluminate 5BaO3CaO2Al2O30.6Sc2O3 compound is supposed to be a carrier for aarium oxide or barium atom which is the electron source, and it plays the role in controlling and roplonishing the electron source. The proposed mechanism has been proved by some experimental data.

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參考文獻(xiàn)(1)

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