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中文摘要：
采用化学共沉淀法合成前驱体，前驱体经1150℃烧结得到ZrW2O8／ZrO2复合材料。对ZrW2O8／ZrO2前驱体进行傅里叶变换红外光谱、热重-差示扫描量热分析；通过X射线衍射仪（XRD）、扫描电镜（SEM）、能谱仪（EDS）和热膨胀仪对合成样品的晶体结构、断面形貌和热膨胀性能进行表征。研究结果表明：合成的复合材料的组元为α-ZrWwO8和m-ZrO2相，化学均匀性良好且易烧结；随着ZrW2O8质量分数增加，复合材料的热膨胀系数减小，其中26％ZrW2O8／ZrO2复合材料在30～600℃的平均热膨胀系数为-0．5649×10^-6 K^-1，近似为0。
英文摘要：
ZrW2O8/ZrO2 composites were prepared by calcining the precursor synthesized by the chemical coprecipitation method at 1150℃ for 3.5 h. The precursor of ZrW2O8/ZrO2 was studied by Fourier transform infrared spectroscopy （FTIR） and thermogravimetric and differential scanning calorimetry （TG-DSC）. The crystal structure, section morphology and thermal expansion properties of the synthesized composites were investigated by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, energy dispersive spectrometer （EDS） and dilatometry. The results indicate that the obtained composites contain only α-ZrW2O8 phase and m-ZrO2 phase without other phases, which have good chemical uniform and sintering ability. The average thermal expansion coefficient of ZrW2O8/ZrO2 composites decreases with the increase of mass fraction of ZrW2 08. Among all the samples, 26%ZrW2O8/ZrO2 composites exhibit nearly zero thermal expansion, and the average thermal expansion coefficient is -0.5649 10^-6 K^-1 from 30℃ to 600℃.
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