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中文摘要：
以共沉淀法制备ZrW2O8粉体并考察粉体粒径与热膨胀性能之间的关系。对其前驱体进行热重-差热分析（TG·DSC），以X射线粉末衍射（XRD）、透射电镜（TEM）、扫描电子显微镜（SEM）分别对粉体进行物相分析和形貌观测。结果表明所得粉体为单一立方结构。当nPEG／nmetal为0．032时，得到的ZrW2O8粉体颗粒达到0．4μm×0．41μm。晶格常数受颗粒大小的影响较显著，但当颗粒大小变化较小时，热膨胀系数基本不变。
英文摘要：
To describe the effect of particle size on thermal expansion coefficient, ZrW2O8 powders with different particle size were synthesized by co-precipitation method. The precursor of ZrW2O8 was studied by thermogravimetric and differential scanning calorimetry method （TG-DSC）. The structure and morphology of the resulting products were characterized by powder X-ray diffraction （XRD） and scanning electron/nicroscopy （SEM） respectively. Results exhibited that the samples were single cubic phase. When the value of nPEG/n metal was 0.032, the smallest ZrW208 particle with an average dimension of 0.4μm × 0.41μm were obtained. The lattice constant was obviously influenced by particle size, but the negative thermal coefficient was about the same （-6.01 × 10^6K） when particle size was in micrometer range and differed not too much.
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