| Pb(Zr0.52Ti0.48)O3陶瓷畴界粘滞运动的介电损耗模拟 |
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| 引用本文： | 陈小兵,严 峰,李春华,朱劲松,沈惠敏,王业宁.Pb(Zr0.52Ti0.48)O3陶瓷畴界粘滞运动的介电损耗模拟[J].物理学报,1999,48(8):1529-1534. |
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| 作者姓名： | 陈小兵 严 峰 李春华 朱劲松 沈惠敏 王业宁 |
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| 作者单位： | 南京大学固体微结构物理国家重点实验室, 南京 210093;南京大学固体微结构物理国家重点实验室, 南京 210093;南京大学固体微结构物理国家重点实验室, 南京 210093;南京大学固体微结构物理国家重点实验室, 南京 210093;南京大学固体微结构物理国家重点实验室, 南京 210093;南京大学固体微结构物理国家重点实验室, 南京 210093 |
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| 摘 要： | 对不同频率下(1—10kHz)Pb(Zr0.52Ti0.48)O3多晶陶瓷的介电性能的测量表明：在接近铁电相变温度Tc以下存在一介电损耗峰，该峰具有弛豫特征但不满足Arrhenius关系．这一损耗峰被认为是由于畴界与晶格、缺陷钉扎的互作用引起的．用畴界粘滞运动的动力学方程，考虑陶瓷样品中Tc离散分布的情况，模拟了该介电损耗峰在不同频率下的行为，得到了与实验数据一致的结果．并由拟合参数计算了畴界运动
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| 收稿时间： | 2/8/1999 12:00:00 AM |
SIMULATION OF DIELECTRIC LOSS RELATED WITH THE MOTION OF DOMAIN WALLS |
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| CHEN XIAO-BING,YAN FENG,LI CHUN-HUA,ZHU JIN-SONG,SHEN HUI-MIN and WANG YE-NING.SIMULATION OF DIELECTRIC LOSS RELATED WITH THE MOTION OF DOMAIN WALLS[J].Acta Physica Sinica,1999,48(8):1529-1534. |
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| Authors: | CHEN XIAO-BING YAN FENG LI CHUN-HUA ZHU JIN-SONG SHEN HUI-MIN and WANG YE-NING |
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| Abstract: | The measurement of dielectric susceptibility under various frequencies for Pb(Zr0.52Ti0.48)O3 (PZT) ceramics shows that there exists a dielectric loss peak below and close to phase transition temperature, which is relaxational characteristic but disagrees with Arrhenius relation. The peak arise from the interaction between domain walls, lattice and pinning defects. In this paper the behavior of the dielectric loss peak of PZT under various frequencies is simulated by using the dynamic equation of viscous motion of domain walls and by considering the Curie temperature dispersion in ceramics as well. The agreement between the simulatied result and experimental data is quite satisfactory. And from the parameters of simulation the viscous coefficient of the motion of domain walls and the recovering force constant of pinning defects are calculated. |
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