MECHANISM FOR APPEARANCE OF MULTIFUNCTIONAL OF FERROELECTRICS WITH GIANT SPONTANEOUS POLARIZATION AND DEVELOPMENT FOR MULTIFUNCTIONAL SENSOR FUSION

具有巨大自发极化的多功能铁电体的出现机制及多功能传感器融合的发展

• 批准号: 09650353
• 负责人: YASUDA Naohiko
• 金额: $ 2.24万
• 依托单位: GIFU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650353/
• 关键词: RELAXOR FERROELECTRICS; SOLID SOLUTIONS; GIANT SPONTANEOUS POLARIZATION; PYROELECTRIC PROPERTIES; PIEZOELECTRIC PROPERTIES; COEXISTENCE OF DOMAINS; MORPHOTROPIC PHASE BOUNDARY; NANOSCALE MICROSTRUCTURE; 酸化物強誘電体固溶体材料; 極微細構造,制御; モルフォトロピック相境界; 強誘電

Recently much attention has been given to diffuse phase transition (relaxor behavior) from viewpoint of fundamental interest and also practical importance in the development of ferroelectric materials. In this work, some relaxor-based ferroelectric single crystals with microscopically controlled ordering degree of chemical ordering at B-site in the complex perovskite Pb(B,B')O3 structure were successfully grown, by using PbO-flux method. Structural, optical, dielectric, pyroelectric, piezo-electric properties of single crystals and ceramics of relaxor-based ferroelectrics such as Pb(Mg_<1/3> Nb_<2/3>)O_3(PHN), Pb(Zn_<l/3>Nb_<2/3>)O_3(PZN), Pb(In_<l/2>Nb_<l/2>)O_3(PIN), Pb(Mg_<1/2>W_<1/2>)O_3(PMW), Pb(Sc_<1/2>Ta1_<1/2>)O_3(PST) and their solid solutions with normal ferroelectric PbTiO_3(PT) and PbZrO_3(PZ), and so on have been investigated as functions of compositions, temperature, pressure, and dc-biasing fields by X-ray diffraction, polarized microscopy, Raman scattering and impedance … More gain phase analyser. We found that the volume effects(namely, the excess volume accompanied with the disordering at the B-site) play an important role in the manifestation of the relaxor behavior. Such volume and chemical effects were found to be performed by suitable substitution effects at B-site. Moreover, large ferroelectric properties such as giant spontaneous polarization, permittivity and electromechanical coupling were found to be induced by the coexistence of heterophases (many kinds of domains such as ferroelectric, antiferroelectric and relaxor / mesoscopical coexistence of microclusters/ a number of sites of polarization) near morphotropic phase boundary in relaxor-based ferroelectric solid solutions. From such coexistence in relaxor ferroelectrics, development for gradient functional ferroelectric materials (e.g., multi-functional sensor fusion) can be expected. In this work, especially, superior dielectric, pyroelectric and piezoelectric properties could be found for PIN-PT, PIN-PZ and PMW-PT solid solution systems. Less

扩散相变（弛豫行为）是铁电材料研究中的一个重要方面，也是铁电材料发展中的一个重要方面。本工作采用PbO助熔剂法成功地生长出了在B位化学有序度可微观控制的弛豫型Pb（B，B '）O_3铁电单晶。弛豫基铁电体的单晶和陶瓷的结构、光学、介电、热释电、压电性能（Mg_（1/3）Nb_（2/3））O_3（PHN），Pb（Zn_（1/3）Nb_（2/3））O_3（PZN），Pb（In_<1/2>Nb_<1/2>）O_3（PIN），Pb（Mg_<1/2>W_<1/2>）O_3（PMW），Pb（Sc_（1/2）Ta_（1/2））O_3（PST）及其与常规铁电体PbTiO_3（PT）和PbZrO_3（PZ）的固溶体，用X射线衍射、偏光显微镜、拉曼散射和阻抗谱等方法研究了温度、压力和直流偏置场等因素对薄膜结构的影响 ...更多信息 增益相位分析器我们发现，在弛豫行为的表现形式中，体积效应（即过量体积伴随着B位的无序）起着重要的作用。发现这种体积效应和化学效应是通过B位的适当取代效应来实现的。研究发现，在弛豫型铁电固溶体中，准同型相界附近的异质相共存（铁电畴、反铁电畴、弛豫/介观共存的微团簇/多个极化位点）可诱导出巨自发极化、介电常数和机电耦合等大的铁电性质.从弛豫铁电体中的这种共存，梯度功能铁电材料（例如，多功能传感器融合）。在这项工作中，特别是PIN-PT、PIN-PZ和PMW-PT固溶体系统，发现了优越的上级介电、热释电和压电性能。少

项目成果

Naohiko Yasuda: "Dielectric Properties of Pb(In_<1/2>Nb_<1/2>)O_3-PbTiO_3 Single Crystal" Ferroelectrics. in Press. (1998)

安田直彦：“Pb(In_<1/2>Nb_<1/2>)O_3-PbTiO_3单晶”铁电体的介电性能。

N.Yasuda, H.Ohwa, Y.Nakaoka, M.Iwata, Y.ishibashi.: "Dielectric Properties and Pressure Effects in Layer-type Bismuth Solid Solution of Sr_<2-x>Pb_xBi_4Ti_5O_<18> (0<X<2)" Ferroelectrics. 217. 65-73 (1998)

N.Yasuda、H.Ohwa、Y.Nakaoka、M.Iwata、Y.ishibashi.：“Sr_<2-x>Pb_xBi_4Ti_5O_<18> (0<X<

N.Yasuda, H.Ohwa, J.Oohasi, K.Nomura, H.Terauchi, M.Iwata, Y.Ishibashi: "Pressure-Induced Dielectric Change from Relaxor to Antiferroelectric Behavior in Disordered Pb (In_<1/2>Nb_<1/2>) O_3" J.Phys.Soc.Jpn.66, (7). 1920-1923 (1997)

N.Yasuda、H.Ohwa、J.Oohasi、K.Nomura、H.Terauchi、M.Iwata、Y.Ishibashi：“无序 Pb 中压力引起的从弛豫到反铁电行为的介电变化 (In_<1/2>Nb_

Kenji Nomura: "Phase Transitions in Ordered and Disordered Lead Indium Niobate Pb (In_<1/2>Nb_<1/2>) O_3 Studied by X-ray Diffraction" Journal of Korean Physical Society. 32. S989-S992 (1998)

Kenji Nomura：“通过 X 射线衍射研究有序和无序铌酸铅铟 Pb (In_<1/2>Nb_<1/2>) O_3 中的相变”韩国物理学会杂志。

Naohiko Yasuda: "Antiferroelectricity in lead Indium Niobate" Journal of Korean Physical Society. 32. S996-S999 (1998)

安田直彦：“铌酸铅铟中的反铁电性”韩国物理学会杂志。