Thermally induced transitions and depolarization of Fe2O3 doped PMnS-PZN-PZT piezoelectric ceramics
Thermally induced transitions and depolarization of Fe2O3 doped PMnS-PZN-PZT piezoelectric ceramics
复制标题
Fe2O3 掺杂 PMnS-PZN-PZT 压电陶瓷的热致转变和去极化
DOI：
10.1007/s00339-021-04453-5
复制
发表时间：
2021-04
期刊：
影响因子：
--
通讯作者：
Chen Wen
中科院分区：
文献类型：
--
作者：
Zhang Huazhang;Zhou Jing;Shen Jie;Zhou Jingjing;Wu Zhi;He Daping;Chen Wen
研究了Fe 2 O3掺杂PMnS-PZN-PZT陶瓷的热致相变和退极化。陶瓷具有高度扩散的介电峰，但最大介电常数Tm的温度与频率无关，这排除了将陶瓷分类为典型弛豫体的可能性。同时，由热激退极化电流确定的退极化温度Td明显低于Tm，这也与正常铁电体的行为不同。注意到的一个不寻常的现象是，Td与介电常数显示出最快增加的特征温度相当吻合。该特征温度（表示为TF-R）在依赖于温度的介电常数中是微弱的，但是可以通过取介电常数相对于温度的一阶导数来很好地解析。此外，还发现了TF-R周围的一些异常特征，这些异常特征与典型弛豫体中的铁电-弛豫体转变十分相似，因此，TF-R被认为是铁电态向“类弛豫体”态的转变，在这种转变中，铁电有序的相关性被削弱。复阻抗分析揭示了在高温下存在小的可极化实体，为高温弛豫态提供了进一步的支持。结果表明，Fe_2O_3掺杂PMnS-PZN-PZT的退极化与其铁电-顺电转变无关，而是与长程铁电有序被破坏成小尺寸的极性区有关.
Thermally induced transitions and depolarization of Fe2O3 doped PMnS-PZN-PZT ceramics are investigated. The ceramics have a highly diffused dielectric peak, but the temperature for the maximum dielectric permittivity Tm is frequency independent, which rules out the ceramics to be classified as typical relaxors. Meanwhile, the depolarization temperature Td determined by the thermally stimulated depolarization current is found to be notably lower than Tm, which is distinct from the behaviors of normal ferroelectrics as well. An extraordinary phenomenon noted is that the Td coincides quite well with a characteristic temperature where the dielectric permittivity shows the fastest increase. This characteristic temperature, denoted as TF-R, is faint in the temperature-dependent dielectric permittivity but can be well resolved by taking the first derivative of dielectric permittivity with respect to temperature. In addition, it is found a number of features of the anomaly around TF-R that are quite similar to the ferroelectric-to-relaxor transition in typical relaxors, and therefore, the TF-R is assigned to a transition from ferroelectric state to a “relaxor-like” state, in which the correlation of ferroelectric order could be weakened. Complex impedance analysis reveals the presence of small polarizable entities at high temperature, providing further support for the high-temperature relaxor-like state. It is suggested that the depolarization of Fe2O3 doped PMnS-PZN-PZT is related to the disruption of long-range ferroelectric order into polar regions with small sizes, rather than the ferroelectric-to-paraelectric transition.
登录
查看更多内容
影响因子：
3.7
作者：
R. Jiménez;B. Jiménez;J. Carreaud;J. Kiat;B. Dkhil;J. Holc;M. Kosec;M. Algueró
通讯作者：
R. Jiménez;B. Jiménez;J. Carreaud;J. Kiat;B. Dkhil;J. Holc;M. Kosec;M. Algueró
影响因子：
2.7
作者：
X. Dai;Z. Xu;Jiefang Li;D. Viehland
通讯作者：
X. Dai;Z. Xu;Jiefang Li;D. Viehland
影响因子：
5.2
作者：
G. Du;R. Liang;Junxia Wang;Li Wang;Wenbin Zhang;Genshui Wang;Xianlin Dong
通讯作者：
G. Du;R. Liang;Junxia Wang;Li Wang;Wenbin Zhang;Genshui Wang;Xianlin Dong
DOI：
10.1007/s00339-009-5189-z
发表时间：
2009-03
期刊：
Applied Physics A
影响因子：
--
作者：
Dunmin Lin;K. Kwok
通讯作者：
Dunmin Lin;K. Kwok
影响因子：
3
作者：
Zhang, SJ;Xia, R;Shrout, TR
通讯作者：
Shrout, TR