Open AccessPHOTOEMISSION STUDIES ON THE BLUE TUNGSTEN OXIDES
Author(s) -
Kun Xie,
Qi Shang-Xue,
WU Naijuan,
Zhien Lin
Publication year - 1990
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.39.809
Subject(s) - valency , tungsten , valence (chemistry) , materials science , fermi level , tungsten oxide , oxide , oxygen , atomic physics , chemistry , metallurgy , physics , philosophy , linguistics , organic chemistry , electron , quantum mechanics
A series of studies were conducted for surface valency in blue tungsten oxides by using pho-toemission technique. Rusults show that, the blue tungsten oxide contains not only one kind of valency, but conbination of two valences, namely the conbination of W+5 and W+6, and also the process of argon ion eching and high temperature treatment all induce the loss of oxygen in W-chemical reduction process, which causes W transfer from high valence to low valence. Meanwhile, the density of state near Fermi level increases with the change from high valence to low valence.