【作者】 戴玉蓉； 包鹏； 沈惠敏； 朱劲松； 王业宁；

【Author】 DAI Yurong BAO Peng SHEN Huimin ZHU Jinsong WANG Yening National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University,Nanjing 210093

【机构】 南京大学物理系固体微结构国家重点实验室；

【摘要】 通过差热分析(DSC)、内耗以及 Young’s 模量等测量了 PZT 铁电陶瓷材料的相变行为．结果表明,在261和 225 K 各出现一个内耗峰．前者与 DSC 探测到的峰温一致,对应于从四方到单斜的一级相变；后者峰形不对称,对应的 Young’s 模量有突变,但在 DSC 上无反映,这可能与界面的运动有关,即与相变的稳态内耗有关．更多还原

【Abstract】 A bulk thermodynamics study of lead zirconate titanate ferroelectric PbZr_0.52Ti_0.48O₃ is performed through internal friction,Young’s modulus and differential scanning calorimetry（DSC） measurements.Two internal friction peaks are observed near 261 K and 225 K.The former correlates with an enthalpy change revealed by DSC data and is ascribable to a first-order tetragonal to monoclinic phase transition.The latter（225 K）,however,showing asymmetric line shape together with a dramatic decrease in Young’s modulus,might correspond to a phase transition associated with the motion of domain walls.更多还原