Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Preparation of VO2 Superfine Powders by a Redox Method and In Situ Characterization on the Reversible Phase Transition | |
| Zhang Shaohong; Fu Juan; Su Qiucheng; Fu Chunhong; Li Xinjun | |
| 2015-03-01 | |
| Source Publication | RARE METAL MATERIALS AND ENGINEERING
 |
| Volume | 44Issue:3Pages:738-742 |
| Abstract | Oxalic acid was chosen as the reductant to prepare superfine VO2 powders from V2O5 under high-purity N-2 atmosphere. The effect of V2O5:H2C2O4 molar ratio on the VO2 purity was investigated. X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were applied to analyze the VO2 sample. The thermal induced reversible phase transition performance was characterized by simultaneous thermal analysis (STA) and in situ XRD. The results show that when the molar ratio of V2O5 to H2C2O4 is in the range from 1:1.2 to 1:1.4, relatively pure VO2 could be obtained. The as-prepared VO2 is superfine subspheroidal particles of uniform distribution. The mean crystallite size is about 50 nm. It has a reversible phase transition from a low temperature monoclinic phase (P21/c, M phase) to a high-temperature tetragonal phase (P42/mnm, rutile phase or R phase). The DSC curve of the heating-cooling cycles is asymmetrical thermal hysteresis loop. The multicycle loops are coincident well. There is an endothermic phase transition at 68.1 degrees C, and an exothermic phase transition at 60.2 degrees C, with 7.9 degrees C hysteresis. |
| Subtype | Article |
| Keyword | Vanadium Dioxide Redox Thermal Induced Phase Transition Xrd Sta Thermal Hysteresis Loop |
| WOS Headings | Science & Technology ; Technology |
| WOS Subject Extended | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Keyword | VANADIUM DIOXIDE ; THIN-FILMS ; TEMPERATURE ; BEHAVIOR |
| Indexed By | SCI |
| Language | 英语 |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000352249000043 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/9110 |
| Collection | 中国科学院广州能源研究所 |
| Affiliation | Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang Shaohong,Fu Juan,Su Qiucheng,et al. Preparation of VO2 Superfine Powders by a Redox Method and In Situ Characterization on the Reversible Phase Transition[J]. RARE METAL MATERIALS AND ENGINEERING,2015,44(3):738-742. |
| APA | Zhang Shaohong,Fu Juan,Su Qiucheng,Fu Chunhong,&Li Xinjun.(2015).Preparation of VO2 Superfine Powders by a Redox Method and In Situ Characterization on the Reversible Phase Transition.RARE METAL MATERIALS AND ENGINEERING,44(3),738-742. |
| MLA | Zhang Shaohong,et al."Preparation of VO2 Superfine Powders by a Redox Method and In Situ Characterization on the Reversible Phase Transition".RARE METAL MATERIALS AND ENGINEERING 44.3(2015):738-742. |
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