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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

Li1+2x+yAlxNdyTi2-x-ySixP3-xO12系统的锂快离子导体研究

陈瑞福; 王文继   

  1. 福州大学化学系; 福州 350002
  • 收稿日期:1996-09-28 修回日期:1996-10-25 出版日期:1997-10-20 网络出版日期:1997-10-20

Study on Lithium Fast Ion Conductors Li1+2x+yAlxNdyTi2-x-ySixP3-xO12 System

CHEN Ruifu; WANG Wenji   

  1. Department of Chemistry; Fuzhou University Fuzhou 350002 China
  • Received:1996-09-28 Revised:1996-10-25 Published:1997-10-20 Online:1997-10-20

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摘要： Li1+2x+yAlxNdyTi2-x-ySixP3-xO12 锂快离子导体（以下简称Al-Nd-Lisicon）可以用精选的天然高岭石Al4[Si4O10]（OH）8为起始原料，经与Li2CO3、TiO2、NH4H2PO4进行高温（800～1000℃）固相反应约20h而制得.一个空间群属于R3c的固溶体导电相可在y=0．5，x≤0.3和y=1.0，x≤0．4的组成范围内发现.该相具有较好的电导性和较低的活化能．起始组成y=1．0,x=0．3的合成物具有最高的电导率，在400℃时；其电导率达到3．08×10-2S／cm，离子导电激活能为35．2kJ／mol.

关键词: 矿物快离子导体, Al-Nd-Lisicon, 高岭石

Abstract: Natural layered aluminosilicate kaolinite Al4[Si4O10](OH)8 was used as a starting material for perparing a new system of lithium fast ion conductors
Li1+2x+yAlxNdyTi2-x-ySixP3-xO12 by high temperature (800～1000℃) solid phase reaction for about 20h. A solid solution phase with R3c structure exists in a
limited composition region. The electrical measurements indicated that the maximum conductivity in the above system (referred to as Al-Nd-Lisicon) is
the initial composition with x=1.0, x=0.3, its conductivity reaches up to 3.08×10-2S/cm at 400℃ and the activation energy is 35.2kJ/mol.

Key words: mineral fast ion conductors, Al-Nd-Lisicon, kaolinite