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ferroelectric compounds are formally classified into two typical groups 1)displactive-type ferroelectric where relative displacement of negative and positive ions is responsible for a macroscopic electric polarization such as BT.(2) order-disorder-type ferroelectrics including hydrogen-bonded ferroelectrics where the phase transition occurs by cooperative alignment of permanent dipole moments .Çë¸÷λ´óÉñÖØµã·ÒëÁ½¸öÀàÐͺóÃæµÄ´Ó¾ä¡£·¢×ÔСľ³æAndroid¿Í»§¶Ë |
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