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Acta Metall Sin  2005, Vol. 41 Issue (6): 669-672     DOI:
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Hydrothermal Synthesis of Negative Thermal Expansion Material ZrW2O8
XING Qifeng; XING Xianran; DU Ling; YU Ranbo; CHEN Jun; DENG Jinxia; LUO Jun
Department of Physical Chemistry; University of Science & Technology Beijing; Beijing 100083; Department of Chemistry; University of Science & Technology Beijing; Beijing 100083
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XING Qifeng; XING Xianran; DU Ling; YU Ranbo; CHEN Jun; DENG Jinxia; LUO Jun. Hydrothermal Synthesis of Negative Thermal Expansion Material ZrW2O8. Acta Metall Sin, 2005, 41(6): 669-672 .

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Abstract  Negative thermal expansion compound ZrW2O8 was successfully synthesized by hydrothermal method with low temperature heat treatment at 500 ℃. The XRD result showed that the crystalline precursor ZrW2O7 (OH) 2 (H2O) 2 was formed when the concentration of HCl was equal to or greater than 6 mol/L. The thermal stability of the synthesized ZrW2O8 and its precursor ZrW2O7 (OH) 2 (H2O) 2 were studied by thermo-gravimetric analysis (TGA) and differential thermal analysis (DTA), which confirmed ZrW2O8 could be synthesized through sintering the precursor at low temperature of 500 ℃. Powder X-ray diffraction and FT-IR spectroscopy investigations confirmed that the synthesized product is single cubic ZrW2O8 phase.
Key words:  ZrW2O8      hydrothermal synthesis      negative thermal expansion      
Received:  31 August 2004     
ZTFLH:  TQ174  
  O614  

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https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2005/V41/I6/669

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