QQ客服 官方微博 反馈留言

	Impedance analysis study on the sensing process of BaTiO/sub 3/ based PTC ceramics in CO gas
	Zhi-Gang Zhou ; Zi-Long Tang ; Zhong-Tai Zhang
	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	Practical Experimental/ barium compounds carbon compounds ceramics electrical resistivity electron mobility electron traps gas sensors grain boundaries lanthanum semiconductor materials/ impedance spectroscopy sensing process BaTiO/sub 3/ based PTC ceramics CO gas sensor electric structure relaxational processes charge transport kinetic properties sensitivity grain boundary resistance impedance spectrum electron traps semiconducting PTCR ceramics BaTiO/sub 3/:La/ A8280T Chemical sensors A7220J Charge carriers: generation, recombination, lifetime, and trapping (semiconductors/insulators) A6170N Grain and twin boundaries A7220F Low-field transport and mobility piezoresistance (semiconductors/insulators) A7280J Electrical conductivity of other crystalline inorganic semiconductors B7230L Chemical sensors B7320T Chemical variables measurement/ BaTiO3:La/ss BaTiO3/ss TiO3/ss Ba/ss La/ss O3/ss Ti/ss O/ss La/el La/dop
中文摘要	Impedance spectroscopy is suitable to evaluate the electric structure and behavior by probing the relaxational processes during the charge transport within this kind of electrically inhomogeneous PTCR ceramics. This technique has been used to characterize the change of structure and behavior in sensing process of La-doped PTC-type BaTiO/sub 3/ as a CO gas sensor. The kinetic behavior of PTCR-CO ceramics in sensing process was detected. The sensitivity of the PTCR-CO comes from the change in the grain-boundary resistance of the ceramics with different temperatures in surrounding atmosphere. An important indirect evidence for the creation of new electron traps in grain boundaries of the semiconducting PTCR ceramics have been found using by impedance spectrum. The creation of the new defects and electron traps in grain boundaries, [V/sub o/*], [e'], and/or [V/sub omicron //sup x/], still plays a dominant role.
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/123456789/18417]
专题	清华大学
推荐引用方式 GB/T 7714	Zhi-Gang Zhou,Zi-Long Tang,Zhong-Tai Zhang. Impedance analysis study on the sensing process of BaTiO/sub 3/ based PTC ceramics in CO gas[C]. 见:Key Engineering Materials, 3rd International Conference on High-Performance Ceramics (CICC-3), Shenzhen, China, INSPEC.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。