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| La10(SiO4)6－x(GaO4)xO3－0.5x的合成及其导电性能 | |
| 引用本文： | 王贵领,赵辉,霍丽华,高山.La10(SiO4)6－x(GaO4)xO3－0.5x的合成及其导电性能[J].化学学报,2008,66(12):1411-1416. |
| 作者姓名： | 王贵领 赵辉 霍丽华 高山 |
| 作者单位： | 1. 哈尔滨工程大学材料科学与化学工程学院,哈尔滨,150001 2. 黑龙江大学化学化工与材料学院功能材料省高校重点实验室,哈尔滨,150080 |
| 基金项目： | 教育部科学技术研究项目 , 黑龙江省杰出青年科学基金 , 黑龙江省自然科学基金 , 哈尔滨市青年创新人才基金 , 哈尔滨工程大学校科研和教改项目 |
| 摘 要： | 以溶胶-凝胶法合成前驱体, 在950 ℃时烧结制得La10(SiO4)6－x(GaO4)xO3－0.5x (x＝0, 0.5, 1.0, 1.5和2.0)陶瓷样品, 通过TG-DTA, XRD, IR和SEM表征, 所得产品为磷灰石相. 以电化学阻抗谱研究了其导电性能, 发现决定电导率大小的因素有两种, 一是间隙氧的数量, 二是晶胞的大小, 两种因素的综合作用, 使得La10(SiO4)5(GaO4)O2.5的电导率最大, 在700 ℃时其电导率达到4.66×10－2 S•cm－1. 离子迁移数和氧分压对电导率的研究表明, 其主要的电荷载体是O2－离子. |
| 关 键 词： | 硅掺杂磷灰石 溶胶-凝胶法 自由氧传导 间隙氧传导 电化学阻抗谱 |
| 收稿时间： | 2007-10-9 |
| 修稿时间： | 2007年10月9日 |
Synthesis and Conducting Properties of La10(SiO4)6-x(GaO4)xO3-0.5x |
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| WANG,Gui-Ling,ZHAO,Hui,HUO,Li-Hua,GAO,Shan.Synthesis and Conducting Properties of La10(SiO4)6-x(GaO4)xO3-0.5x[J].Acta Chimica Sinica,2008,66(12):1411-1416. | |
| Authors: | WANG Gui-Ling ZHAO Hui HUO Li-Hua GAO Shan |
| Institution: | (a College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001) (b Laboratory of Functional Materials, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080) |
| Abstract: | La10(SiO4)6－x(GaO4)xO3－0.5x (x＝0, 0.5, 1.0, 1.5 and 2) was successfully synthesized via a sol-gel method at 950 ℃, their apatite phases have been characterized by TG-DTA, XRD, IR and SEM, and their conducting properties were studied by electrochemical impedance spectroscopy. It was found that the conductivity was mostly influenced by both interstitial oxygen concentration and the volume of a unit cell, and the conductivity of La10(SiO4)5(GaO4)O2.5 was highest among all the synthesized oxyapatites, being 4.66×10－2 S•cm－1 at 700 ℃. Transport number of oxygen ions and the dependence of electrical conductivity on oxygen partial pressure indicate that the charge carriers of the silicate oxyapatite are oxygen ions. |
| Keywords: | Si-doped apatite sol-gel method free oxygen ion conduction interstitial oxygen ion conduction electrochemical impedance spectroscopy |
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