| o-ZrWl.6Mo0.408： A Novel Orthorhombic Intermediate Phase Formed During the Synthesis of the Negative Thermal Expansion Cubic ZrWl.6Mo0.4O8 Material by the Precursor Dehydration Route |
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| 引用本文： | 赵新华,黄令,刘鹏辉,马辉.o-ZrWl.6Mo0.408： A Novel Orthorhombic Intermediate Phase Formed During the Synthesis of the Negative Thermal Expansion Cubic ZrWl.6Mo0.4O8 Material by the Precursor Dehydration Route[J].中国化学,2003,21(12):1529-1531. |
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| 作者姓名： | 赵新华 黄令 刘鹏辉 马辉 |
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| 作者单位： | [1]DepartmentofChemistry,BeijingNormalUniversity,Beijingl00875,China [2]AnalyzingandTestingCenter,BeijingNormalUniversity,Beijing100875,China |
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| 摘 要： | The mechanism of the precursor dehydration route was revealed for the synthesis of NTE c-ZrW1.6Mo0.4O8. The hydrate precursor was dehydrated at 473 K and transformed to a NTE cubic compound above 800 K. A novel intermediate phase o-ZrWl.6Mo0.4O8 occurs between the temperature range of 573-800 K. The XRD pattern of novel intermediate was refined with the structural model of LT-ZrMo2O8 by using Rietveld method.The residuals are Rwp=7.80% and Rp=5.79%. The space group is Pmn21 and the lattice parameters are α=0.5917(4)nm, b=0.7273(4) nm, c =0.9148(6) nm, and Z=2.
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| 关 键 词： | o-ZrWl.6Mo0.408 斜方晶 合成 热膨胀材料 脱水 立体相 钼钨锆复合氧化物 |
o‐ZrW1.6Mo0.4O8: A Novel Orthorhombic Intermediate Phase Formed During the Synthesis of the Negative Thermal Expansion Cubic ZrW1.6Mo0.4O8 Material by the Precursor Dehydration Route |
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| Xin‐Hua Zhao,Ling Huang,Peng‐Hui Liu,Hui Ma.o‐ZrW1.6Mo0.4O8: A Novel Orthorhombic Intermediate Phase Formed During the Synthesis of the Negative Thermal Expansion Cubic ZrW1.6Mo0.4O8 Material by the Precursor Dehydration Route[J].Chinese Journal of Chemistry,2003,21(12):1529-1531. |
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| Authors: | Xin‐Hua Zhao Ling Huang Peng‐Hui Liu Hui Ma |
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| Abstract: | The mechanism of the precursor dehydration route was revealed for the synthesis of NTE c‐ZrW1.6Mo0.4O8. The hydrate precursor was dehydrated at 473 K and transformed to a NTE cubic compound above 800 K. A novel intermediate phase o‐ZrW1.6Mo0.4O8 occurs between the temperature range of 573–800 K. The XRD pattern of novel intermediate was refined with the structural model of LT‐ZrMo2O8 by using Rietveld method. The residuals are Rwp = 7.80% and Rp = 5.79%. The space group is Pmn21 and the lattice parameters are a = 0.5917(4) nm, b =0.7273(4) nm, c =0.9148(6) nm, and Z = 2. |
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| Keywords: | precursor dehydration route negative thermal expansion (NTE) materials ZrWz‐x MoxO8 |
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