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Dissolution behaviors of Ta2O5, Nb2O5 and their mixture in KOH and H2O system
Wang Xiao-hui1,2; Zheng Shi-li1; Xu Hong-bin1; Zhang Yi1; Wang, XH
2010-10-01
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
Volume20Issue:10Pages:2006-2011
AbstractThe dissolution behaviors of Ta2O5, Nb2O5 and their mixture in KOH and H2O system were investigated. A L-9(3(4)) orthogonal design was used to study the effects of reaction temperature, mass ratio of KOH to Ta2O5, and reaction time on the dissolution rate of tantalum. It was found that the effect of reaction temperature on the dissolution rate of tantalum was much greater than that of the other factors. The results of factorial experiments showed that Ta2O5 was mainly transformed into insoluble potassium tantalate at low temperature (350 degrees C) and transformed into soluble potassium tantalate at high temperature (450 degrees C). The insoluble potassium tantalate was analyzed by XRD, which was proved to be KTaO3. Differently, almost all Nb2O5 was transformed into soluble potassium niobate at 350-450 degrees C. As for the mixture of Ta2O5 and Nb2O5, the dissolution rate of tantalum increased and the dissolution rate of niobium decreased as an interaction existed between niobium and tantalum. And increasing the mole ratio of Nb2O5 to Ta2O5 in the mixture was beneficial to the dissolution of both Ta2O5 and Nb2O5. In addition, the mechanism of the interaction between niobium and tantalum was also investigated through phase and chemical analysis.
KeywordTa2o5 Nb2o5 Koh Dissolution Behavior Mechanism Solid-solution
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/S1003-6326(09)60409-X
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000283919400031
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5405
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorWang, XH
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Wang Xiao-hui,Zheng Shi-li,Xu Hong-bin,et al. Dissolution behaviors of Ta2O5, Nb2O5 and their mixture in KOH and H2O system[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2010,20(10):2006-2011.
APA Wang Xiao-hui,Zheng Shi-li,Xu Hong-bin,Zhang Yi,&Wang, XH.(2010).Dissolution behaviors of Ta2O5, Nb2O5 and their mixture in KOH and H2O system.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,20(10),2006-2011.
MLA Wang Xiao-hui,et al."Dissolution behaviors of Ta2O5, Nb2O5 and their mixture in KOH and H2O system".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 20.10(2010):2006-2011.
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