摘要
As an important powder material for scandate cathode,Sc_(2) O_(3)-doped WO_(3) powder together with hollow spherical WO_(3) for comparison was prepared by spraydrying method.The reduction behavior and kinetics of pure WO_(3) and Sc_(2) O_(3)-doped WO_(3) were studied by temperatureprogrammed reduction(TPR) method.It is found that scandia doping can decrease the reduction activation energy of WO_(3) and thus lower the reduction temperature and increase the reduction rate.Based on the kinetics results,the reduction techniques are presented.The obtained powder has a narrow size distribution in the range of 0.6-0.8 μm.
基金
financially supported by the National Key Research and Development Program of China(Nos.2017YFA0701000 and 2016YFE0126900)
the National Natural Science Foundation of China(Nos.51471006,51534009 and52621003)
the Fundamental Research Funds for the Central Universities(Nos.ZYGX2018J024 and ZYGX2015Z010)。
