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Decomposition-carbonization of ammonium paratungstate in a fluidized bed
Pan, Feng1; Zhu, Qingshan1,2; Li, Shaofu1; Xiang, Maoqiao1; Du, Zhan1
2018-04-01
Source PublicationINTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
ISSN0263-4368
Volume72Pages:315-322
Abstract

In this study, the reduction-carbonization property of WO3 obtained by thermal decomposition of ammonium paratungstate (APT) under N-2 and air atmosphere in a fluidized bed was investigated. The decomposition property of APT in N-2 and air was analyzed by TG analyzer. Phase, morphology, deoxidation rate and carbonization rate of the decomposed products in the reduction-carbonization process were investigated. It was found that APT could be rapidly decomposed into monoclinic WO3 in a fluidized bed in Ny or air atmosphere. Compared with N-2 atmosphere, air was more favorable for the rapid decomposition of APT and the crystal transition of WO3. Under the same conditions, the products obtained in N-2 atmosphere had smaller grain size, larger porosity, faster deoxidation rate and carbonization rate. Both WO3 obtained in the N-2 and air could be reduced and carbonized to nano-sized WC with SBET particle sizes of 63.70 nm and 73.49 nm in a fluidized bed, respectively.

KeywordAmmonium Paratungstate (Apt) Fluidized Bed Thermal Decomposition Monoclinic Wo3 Nano-sized Wc
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.ijrmhm,2017.12.032
Indexed BySCI
Language英语
WOS KeywordTungsten Carbide Powders ; Thermal-decomposition ; Tetrahydrate ; Air ; Atmospheres ; Xrd
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000427209100044
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/24107
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Pan, Feng,Zhu, Qingshan,Li, Shaofu,et al. Decomposition-carbonization of ammonium paratungstate in a fluidized bed[J]. INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS,2018,72:315-322.
APA Pan, Feng,Zhu, Qingshan,Li, Shaofu,Xiang, Maoqiao,&Du, Zhan.(2018).Decomposition-carbonization of ammonium paratungstate in a fluidized bed.INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS,72,315-322.
MLA Pan, Feng,et al."Decomposition-carbonization of ammonium paratungstate in a fluidized bed".INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 72(2018):315-322.
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