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HYDROGEN-INDUCED SEMICONDUCTOR TRANSFORMATION OF PZT FERROELECTRIC CERAMICS |
HUANG Haiyou; CHU Wuyang; SU Yanjing; GAO Kewei; LI Jinxu; QIAO Lijie |
Department of Materials Physics; University of Science and Technology Beijing; Beijing 100083 |
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Cite this article:
HUANG Haiyou; CHU Wuyang; SU Yanjing; GAO Kewei; LI Jinxu; QIAO Lijie. HYDROGEN-INDUCED SEMICONDUCTOR TRANSFORMATION OF PZT FERROELECTRIC CERAMICS. Acta Metall Sin, 2005, 41(9): 1004-1008 .
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Abstract Semiconductor transformation of PZT-5H ferroelectric ceramics induced by
hydrogen has been investigated. The results showed that the leakage current and carrier concentration increased and the
resistivity decreased with increasing hydrogen concentration, and the color of specimen changed from yellow to black. Hydrogen could induce a transition of the insulating PZT-5H ferroelectric
ceramics to n-type semiconductor. During charging in H2 at the temperature higher than the Curie point, hydrogen would restrain
the phase transformation from cubic to tetragonal, resulting in disappearance of ferroelectricity at room temperature. Charging at room temperature, however, did not change the crystal structure of
the tetragonal ferroelectric ceramics. The properties and color of PZT-5H were reinstated after outgassing at high
temperature.
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Received: 18 January 2005
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