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Preparation and characterization of ZrWMoO8 powders with different morphologies |
| LIU Qinqin, YANG Juan, SUN Xiujuan, CHENG Xiaonong |
| School of Material Science and Technology, Jiangsu University, Zhenjiang 212013, China; |
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Abstract ZrWMoO8 powders with different morphologies were obtained using ammonium tungstate, molybdate tungstate and zirconium tungstate as the starting materials by dehydrating the precursor ZrWMoO7(OH)2(H2O)2. The precursor was studied by thermo-gravimetric and differential scanning calorimetry (TG-DSC). The influence of the gelling agents (HCl, HClO4, HNO3, H2SO4 and H3PO4) on the crystallization process and crystal morphology of the products prepared was investigated by X-ray powder diffraction (XRD), scanning electron micrograph (SEM) and X-ray fluorescence spectrometer (XRF). Results showed that the morphology of the ZrWMoO8 particles can be simply adjusted by changing the gelling agents, and the thermal expansion coefficients of cubic ZrWMoO8 prepared in HCl solution are -3.84×10-6 K-1 from 100! to 700!.
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Issue Date: 05 December 2007
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