可控热膨胀材料可用于高精密光学系统、电子器件和布拉格光栅的温度补偿等.由于ZrWMoO8具有线性一致的NTE特性,本工作以硝酸氧锆(ZrO(NO3)2·5H2O)、钨酸铵(H40N10O41W12·xH2O)和钼酸铵(N6H24Mo7O24·4H2O)为原料,采用湿化学法成功合成出热膨胀系数可控的ZrWMoO8陶瓷复合材料.采用热重-差示扫描量热分析(TG-DSC)分析了前驱体的晶化过程;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,合成所得复合材料的成分均为ZrO2和β-ZrWMoO8,热膨胀系数在30～600℃温度区间内均线性一致,并且随着β-ZrWMoO8的质量分数的增大,复合材料的热膨胀系数逐渐降低,其中ZrO2/50%ZrWMoO8复合材料的热膨胀系数为-0.61×10-6K-1,近似为0.
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