Phase Structure and Electrical Conduction of CaTi1?x Scx 3?δ Ceramics
ZHANG Qi-Long1** , LIU Yang2 , YANG Hui1**
1 Department of Materials Science and Engineering, Zhejiang University, Hangzhou 3100272 Department of Materials Science and Engineering, University of Sheffield, Mappin Street, Sheffield, S1 3JD, UK
Abstract ：The electrical conduction of CaTi1?x Scx 3?δ ceramics is investigated by ac impedance spectra. A complete solid solution is formed, in which Sc (x≤ 0.17) substitutes for a Ti-site with the creation of oxygen vacancies. The samples of x≤ 0.1 contain two main resistances, the bulk resistance R 1 and the grain boundary resistance R 2 . However, only R 1 and a low-frequency 'spike' representing charge build-up at the blocking metal electrodes are obtained for x≥ 0.15. CaTiO3 ceramics doped with Sc exhibits a relativly high electrical conductivity. With increasing x , both σ 1 and σ 2 of CaTi1?x Scx 3?δ increase first, reach a maximum value at x =0.05, and then decrease to x≥ 0.1.
收稿日期: 2012-10-16
出版日期: 2013-03-04
:
81.05.-t
(Specific materials: fabrication, treatment, testing, and analysis)
77.84.-s
(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)
[1] Hu P, Jiao H, Wang C H, Wang X M, Ye S, Jing X P, Zhao F and Yue Z X 2011 Mater. Sci. Eng. B 176 401 2011 J. Am. Ceram. Soc. 94 817 2007 J. Solid State Chem. 180 824 2010 Energ. Environ. Sci. 3 615 2007 Solid State Commun. 142 710 2008 Inorg. Mater. 44 296 1999 Solid State Ionics 116 85 2011 J. Mater. Chem. 21 12894 2011 Solid State Sci. 13 993 2012 Physica B 407 1114 2011 Solid State Sci. 13 2060 2011 Chin. Phys. Lett. 28 057201 2011 Chin. Phys. Lett. 28 038801 2012 J. Phys. Chem. Solids 73 568 2012 J. Appl. Phys. 111 054106 2009 Chin. Phys. Lett. 26 027301 2011 Chin. Phys. B 20 048701 2007 Chin. Phys. 16 2131 1996 J. Phys.: Condens. Matter 8 8267
[1]
.
[2]
.
[3]
.
[4]
.
[5]
.
[6]
.
[7]
.
[8]
.
[9]
.
[10]
.
[11]
ZHANG Zao-Di, WANG Ze-Song, WANG Shi-Xu, FU De-Jun. Ultrathin Carbon Films Prepared by Negative Cluster-Beam Technology
[12]
LU Ran,JIANG Gen-Shan,LI Bin,ZHAO Quan-Liang,ZHANG De-Qing,YUAN Jie,CAO Mao-Sheng**. Electrical Properties of Lead Zirconate Titanate Thick Film Containing Micro- and Nano-Crystalline Particles
[13]
HE Jun;J. C. LEE;LI Ming;WANG Ze-Song;LIU Chuan-Sheng;FU De-Jun**
. Computerized Control and Operation of Rutherford Backscattering/Channeling for an in situ Ion Beam System and Its Application for Measurement of Si(001) and ZnO(001)
[14]
YAN Bao-Rong;LV Jian-Hong;KONG Ling-Hua;HU Xi-Wei**
. Numerical Studies of s-Polarized Surface Plasmon Polaritons at the Interface Associated with Metamaterial
[15]
REN Kun;RAO Feng;SONG Zhi-Tang;WU Liang-Cai;ZHOU Xi-Lin;XIA Meng-Jiao;LIU Bo;FENG Song-Lin;XI Wei;YAO Dong-Ning;CHEN Bomy. Si3.5 Sb2 Te3 Phase Change Material for Low-Power Phase Change Memory Application
2013, Vol. 30 
