Effect of TeO_(2) addition on the dielectric properties of CaCu_(3)Ti_(4)O_(12) ceramics derived from the oxalate precursor route

作     者：P.Thomas K.B.R.Varma 

作者机构：Dielectric Materials DivisionCentral Power Research Institute Bangalore 560080India Materials Research CentreIndian Institute of Science Bangalore 560012India 

出 版 物：《Journal of Advanced Dielectrics》 (先进电介质学报（英文）)

年 卷 期：2013年第3卷第4期

页      面：26-33页

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0702[理学-物理学] 

基　　金：The management of Central Power Research Institute is acknowledged for the financial support(CPRI Project No.R-DMD-01/1415) 

主　　题：Dielectric TeO_(2) CaCu_(3)Ti_(4)O_(12) ceramic 

摘      要：CaCu_(3)Ti_(4)O_(12)(CCTO)ceramics which has perovskite structure gained considerable attention due to its giant *** it has high tan
(0.1 at 1 kHz)at room temperature,which needs to be minimized to the level of practical ***,TeO_(2) which is a good glass former has been deliberately added to CCTO nanoceramic(derived from the oxalate precursor route)to explore the possibility of reducing the dielectric loss while maintaining the high *** structural,morphological and dielectric properties of the pure CCTO and TeO_(2) added ceramics were studied using X-ray diffraction,Scanning Electron Microscope along with Energy Dispersive X-ray Analysis(EDX),spectroscopy and Impedance *** the 2.0 wt.%TeO_(2) added ceramics,there is a remarkable difference in the microstructural features as compared to that of pure CCTO *** sample exhibited permittivity values as high as 7387 at 10 KHz and low dielectric loss value of 0.037 at 10 kHz,which can be exploited for the high frequency capacitors application.