Ag_(0.9)Na_(0.1)(Nb_(0.6)Ta_(0.4))O_3纳米粉体的制备及介电性能研究

Synthesis of Nanosized Ag_(0. 9)Na_(0. 1)(Nb_(0. 6)Ta_(0. 4))O_3 Ceramic Powder and Investigation on its Property

采用柠檬酸凝胶法合成（Ag0.9 Na0.1）（Nb0.6 Ta0.4）O3复合氧化物纳米粉体，应用x射线衍射（XRD）、透射电镜（TEM）和电子衍射方法对该纳米瓷粉进行了表征，并对该瓷粉烧结的陶瓷进行了SEM分析和介电性能研究；研究结果表明：该系列纳米瓷粉的合成温度为800℃，灼烧时间为3小时，瓷粉平均粒径大约为40nm，无严重的团聚现象；系统在1040℃-1060℃的范围内可烧结成致密的陶瓷，介电性能方面较固相法制备产品有明显改善，其具体表现在介电常数增大，介电损耗减小。

In this paper,Ag0.9 Na0.1 （Nb0.6 Ta0.4 ）O3 （ANNT）mixed oxide nanosized powder was synthesized by citric acid gel method. XRD、TEM、electron diffraction and SEM analysis were used.The result showed that the reaction temperature was 800℃,the calcining time was three hours,and the product was pure ANNT in well-dispersed grain structure （40nm in average）.The product was calcined to be dense ceramic between 1040℃ to 1060℃ and dielectric capability was better than that of solid method,such as the bigger dielectric constant and the smaller dielectric loss.