研究了扩散相变中心温度分别为４０℃和６５℃的两种Ｌａ－掺杂ＰＭＮ基陶瓷在其扩散相变温度范围的电致应变、电致应变随电场（Ｓ～Ｅ）的滞后特性和剩余应变效应．结果发现，对于扩散相变中心温度为４０℃的材料在０～１ｋＶ／ｍｍ单向电场驱动下；从－１０～６０℃电致应变和滞后都随温度的升高而减小；对另一种材料无论由±１ｋＶ／ｍｍ交变电场或由０～１ｋＶ／ｍｍ单向电场驱动，温度从１３～４１℃变化均出现电致应变峰值，而滞后和剩余应变随温度的升高而减小．对以上实验结果本文作了详细讨论．
The electrostrictive strain, hysterestic (S～ E) nature and remanent strain effect were investigated in their diffuse phase transition temperature
rang for two kinds of La-doping PMN-based ceramics with the diffuse phase transition center temperature 40℃ and 65℃ respectively.
The experimental results show that for the material with diffuse phase transition center temperature 40℃, its strain and hysteresis decrease as temperature
increases in the range of --10℃ to 60℃ driving by 0～1kV/mm one direction field, and for the other material whether driving by ±1kV/mm AC field or 0～1kV/mm one direction field the strains exhibit a
peak value with temperature change from 13℃ to 41℃, the remanent strain and hysteresis decrease monotonically with temperature increase. Above
experimental results were also explained in detail.
参考文献
| [1] | Cieminski J V, et al. Ferroelectrics, 93: 315. [2] Pilgrim S M, et al. J. Am. Ceram. Soc., 1992, 75 (7): 1970. [3] 盛文军. 中科院上海硅酸盐所硕士学位论文，1994年. [4] Park J H, Kim B K, et al. Mat. Res. Bull., 1995, 30: 435. [5] Swartz S L, et al. Mat. Res. Bull., 1982, 17: 1245. [6] 温保松，严鸿萍，马佳华(WEN Bao-Song, et al). 无机材料学报(Journal of Inorganic Materials)，1999, 14 (6): 945. |
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