【摘要】 在0～14kbar之间的不同压力下,测量了多晶PbMg_1/3Nb_2/3O₃铁电体的介电常数ε在-196℃～50℃温区内随温度变化的关系,并得到了在不同温度下较完整的ε-P关系1/ε-1/ε_max=B′（P-P_m）^m′;用弥散相变统计模型对所得的测量结果作了分析,且讨论了压力对弥散相变的影响.更多还原

【Abstract】 The behaviour of the dielectric constant s of polyerystal ferroelectric PbMg1/3 Nb2/3O3 was measured in the temperature range -196℃-50℃ at the different pressures and the ε - P relation was obtained. The results were analysed by the statistical model of diffuse phase transition and the effect of pressures on diffuse phase transitions was discussed.更多还原