Synthesis and Characterization of Fine Grained High Density La2Mo2O9-based Oxide-ion Conductors
Synthesis and Characterization of Fine Grained High Density La2Mo2O9-based Oxide-ion Conductors
复制标题
细晶粒高密度La2Mo2O9基氧化物离子导体的合成与表征
DOI：
--
复制
发表时间：
2009-10
期刊：
影响因子：
--
通讯作者：
Wang, Xianping
中科院分区：
文献类型：
--
作者：
Wang, Jianxin;Li, Chun;Fang, Qianfeng;Wang, Qin;Wang, Xianping
采用改进的Pechini法和两步低温烧结法制备了高性能的La_2Mo_2O_9基氧化物离子导体。通过一系列的烧结实验，确定了合成细晶、高密度、均匀的La_2Mo_2O_9基氧化物离子导体的最佳压制压力、一步烧结温度和二步烧结温度。用此方法制备了平均晶粒尺寸为0.8 ~ 5 μ m的高密度均匀烧结La_2Mo_2O_9样品和平均晶粒尺寸为500 nm的La_（1：96）K_（0：04）Mo_2O_8：96样品。交流阻抗测试结果表明，所制备的La 2 Mo 2 O 9基陶瓷具有比固相反应法高得多的离子电导率。结果表明，在0.8 μ m范围内，晶粒尺寸对La_2Mo_2O_9的电导率影响不大。
A cost-efiective technique, including nanocrystalline powder preparation using a modifled Pechini method and a two-step low-temperature sintering route, was developed for the synthesis of high performance La2Mo2O9based oxide-ion conductors. The optimum parameters of the compaction pressure, the flrst step and the second step sintering temperatures for the synthesis of flne grained, high density and uniform La2Mo2O9based oxide-ion conductors were determined by a series of sintering experiments. High density and uniform sintered La2Mo2O9 samples with average grain size from 0.8 to 5 „m and La1:96K0:04Mo2O8:96 sample with average grain size as small as 500 nm were synthesized by using this cost-efiective method. The impedance measurement results show that the as-fabricated La2Mo2O9-based ceramics possess much higher ionic conductivity than that obtained by solid state reaction method. It is found that in the range of 0.8{5 „m the grain size of dense La2Mo2O9 samples prepared from the nanocrystalline powders has little in∞uence on their conductivities.
影响因子：
5.4
作者：
J. Collado;M. Aranda;A. Cabeza;P. Olivera-Pastor;S. Bruque
通讯作者：
J. Collado;M. Aranda;A. Cabeza;P. Olivera-Pastor;S. Bruque