在AB2O6型化合物中,ZnTa2O6陶瓷具有优异的微波介电性能,但其却具有较高的烧结温度,为1400℃.为了寻求有效途径来降低ZnTa2O6陶瓷的烧结温度,本文采用柠檬酸盐溶胶凝胶法合成了ZnTa2O6纳米陶瓷粉体.利用XRD和SEM等测试技术系统研究了干凝胶前躯体的热分解过程、ZnTa2O6纳米陶瓷粉体的晶体结构和显微形貌特征,并对合成工艺过程中柠檬酸的用量(柠檬酸与金属阳离子的比例CA/Ta)进行了探讨.研究结果表明,当合成温度为900℃时,可以获得单相ZnTa2O6纳米陶瓷粉体,CA/Ta对所获得ZnTa2O6纳米陶瓷粉体的粒度有较大的影响,当CA/Ta=3时,干凝胶经900℃煅烧,可以获得最小粒度的ZnTa2O6纳米陶瓷粉体,为30nm.
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