| 1 | The abnormal sensitivity and its mechanism of (Ba, Pb)TiO_(3) semiconductor ceramics显示文摘The resistance-temperature properties of po- rous (Ba, Pb)TiO3 semiconductor ceramic were systemati- cally 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℃ prior to the Curie point. Further research showed that this abnormal resis- tance-temperature property was linked to its humidity sensi- tivity. 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 poten- tial barrier and ferroelectric-paraelectric phase transforma- tion, the specific sensitive mechanism of (Ba, Pb)TiO3 ce- ramic was analyzed qualitatively. | TIANYuming XUMingxia HUANGPing ELei HAOHuzai CUICai'e | 2005 | Chinese Science Bulletin2005，50，9： | 1 |
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