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	Properties of Sr-doped BaTiO/sub 3/ based X7R ceramic materials
	Hai Wen ; Xiaohui Wang ; Longtu Li ; Zhilun Gui
	2010-05-10 ; 2010-05-10
会议名称	Key Engineering Materials ; 3rd International Conference on High-Performance Ceramics (CICC-3) ; Shenzhen, China ; INSPEC
关键词	Experimental/ barium compounds capacitance doping electrical resistivity ferroelectric ceramics ferroelectricity grain boundaries grain size permittivity shrinkage strontium/ Sr doped BaTiO/sub 3/ based X7R ceramic materials dielectric constant temperature coefficients of capacitance insulation resistivity grain size Sr doping content titanium oxygen octahedral interstice shrinkage ferroelectricity grain boundary 12*10/sup 12/ ohmcm 125 degC BaTiO/sub 3/:Sr/ A7720 Dielectric permittivity A7220F Low-field transport and mobility piezoresistance (semiconductors/insulators) A7780 Ferroelectricity and antiferroelectricity A6170N Grain and twin boundaries A6480G Microstructure A6170T Doping and implantation of impurities/ resistivity 1.2E+11 ohmm temperature 3.98E+02 K/ BaTiO3:Sr/ss BaTiO3/ss TiO3/ss Ba/ss O3/ss Sr/ss Ti/ss O/ss Sr/el Sr/dop
中文摘要	In this paper, Sr-doped BaTiO/sub 3/ based X7R ceramic was prepared. This material has dielectric constant of about 2000, temperature coefficients of capacitance (TCC) at 125 degrees C of 11%, insulation resistivity of 12*10/sup 12/ Omega middot cm and grain size of 350 nm. The effects of Sr doping on the dielectric properties of the ceramics were also investigated. With the increase of Sr content the dielectric constant of the ceramics decreases while the insulation resistivity increases almost linearly. While there is no obvious effect on TCC. The decrease of dielectric constant was considered to originate from the shrink of the titanium oxygen octahedral interstice, which weaken the ferroelectricity of the ceramics. That Sr mainly exists near and in the grain boundary was considered to lead to the improvement of IR.
会议录出版者	Trans Tech Publications ; Switzerland
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/18471]
专题	清华大学
推荐引用方式 GB/T 7714	Hai Wen,Xiaohui Wang,Longtu Li,et al. Properties of Sr-doped BaTiO/sub 3/ based X7R ceramic materials[C]. 见:Key Engineering Materials, 3rd International Conference on High-Performance Ceramics (CICC-3), Shenzhen, China, INSPEC.

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