High Temperature Stability of Zirconium Tungstate
| Autor: | Da Qian Chen, Ping Zhai, Xiao Feng Duan |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Inorganic chemistry Zirconium tungstate 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences chemistry.chemical_compound Negative thermal expansion chemistry Mechanics of Materials 0103 physical sciences Zirconium oxide Tungstic acid General Materials Science 0210 nano-technology |
| Zdroj: | Materials Science Forum. 993:771-775 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.993.771 |
| Popis: | In this paper, zirconium tungstate ceramic with negative thermal expansion coefficients was prepared from zirconium oxide and tungstic acid by solid phase synthesis and high temperature quenching technique with a sintering temperature of 1200 °C. The phase structure of the material was determined by X ray and the thermal expansion coefficient was measured by dilatometer, while the TG-DTA analysis of the prepared material was also carried out. The results showed that zirconium tungstate with high purity could be obtained by rapid chilled while fired at 1200 °C. The coefficient of thermal expansion at 300 °C was minus 8.5413 × 10-6K-1, which is identical with the theoretical value. The thermal expansion coefficient of the material was negative fired lower than 750 °C, while it was positive fired higher than 750 °C, and this indicates that the decomposition temperature of zirconium tungstate is about 750 °C. |
| Databáze: | OpenAIRE |
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