ASTUDY OF VALENCE OF YTTRIUM IN Y_2O_3  Mo CATHODE

Abstract

Abstract: The valenceofelementyttrium of Y2 O3 Mocathode materialhasbeenstudied by usingther mal weight analysis, X ray diffraction analysis, Scanning electron microscopy and X rayphotoelectronspectrum . It hasbeen provedthatyttrium oxidecan bereduced by molybdenum carbide. Thereaction between powdered Y2 O3 and Mo2 Ccan happen at 1173 , and Y2 O3may bereduced to metallicyttrium . Afterthepowder mixtureof Y2 O3 and Mo2 Cwasheat treated at1873 K, Yttrium existsin two kinds of chemicalstate- yttrium of zero valence and yttrium ofthreevalences.

Key words: valence, yttrium , Y2 O3 Mo, cathode

J.S.Wang1,2) ,M.L.Zhou2) ,J.X.Zhang2) ,Z.R.Nie2) T.Y.Zuo2) and G.J.Zhang2) 1) State Key Laboratory of Materials Chemistry and Applications,Peking University ,Beijing 100871 ,China2) Schoolof Materials Science and Engineering ,Beijing Polytechnic University ,Beijing 100022 , China. ASTUDY OF VALENCE OF YTTRIUM IN Y_2O_3 Mo CATHODE[J]. Acta Metallurgica Sinica (English Letters), 1999, 12(4): 602-606.

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ASTUDY OF VALENCE OF YTTRIUM IN Y_2O_3 Mo CATHODE

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