%0 Journal Article
%T The abnormal sensitivity and its mechanism of (Ba, Pb)TiO3 semiconductor ceramics<br>The abnormal sensitivity and its mechanism of （Ba, Pb）TiO3 semiconductor ceramics
%A Tian Yuming
%A Xu Mingxia
%A Huang Ping
%A E Lei
%A Hao Huzai
%A Cui Cai’e
%A <br>TIANYuming
%A XUMingxia
%A HUANGPing
%A ELei
%A HAOHuzai
%A CUICai＇e
%J 科学通报(英文版)
%D 2005
%I 
%X The resistance-temperature properties of porous (Ba, Pb)TiO3 semiconductor ceramic were systematically studied. It was found that the resistance of (Ba, Pb)TiO3 ceramic having been placed in the air for a long time was abnormally increased with the increase of the temperature from the room temperature to 70°C prior to the Curie point. Further research showed that this abnormal resistance-temperature property was linked to its humidity sensitivity. When the relative humidity changed from 11% to 93%, the resistance of (Ba, Pb)TiO3 ceramic decreased three orders of magnitude. Furthermore, the humidity-resistance was approximately linear in single logarithm coordinate. According to the surface adsorption, grain-boundary potential barrier and ferroelectric-paraelectric phase transformation, the specific sensitive mechanism of (Ba, Pb)TiO3 ceramic was analyzed qualitatively.
%K (Ba
%K Pb)TiO3 semiconductor ceramic
%K specific sensitiv- ity
%K grain-boundary potential barrier
%K surface adsorption
%K ferroelec- tric-paraelectric phase transformation<br>Ti03
%K 半导体陶瓷
%K 灵敏度
%K 表面吸附
%K 铁电物质
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=9A14A01D8A867E94EFE318A29D255ECE&yid=2DD7160C83D0ACED&vid=771152D1ADC1C0EB&iid=9CF7A0430CBB2DFD&sid=66973F362693F62B&eid=384C451D3BE0C38C&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=0&reference_num=13