Structure-composition-property relationships in complex ACu3B4O12 perovskites

复杂 ACu3B4O12 钙钛矿的结构-组成-性能关系

• 批准号: EP/E040578/1
• 负责人: Derek Sinclair
• 金额: $ 42.52万
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2007
• 资助国家: 英国
• 起止时间: 2007 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FE040578%2F1
• 关键词: Structure; composition; property; relationships; complex

Preliminary results in our laboratory have shown two members (CaCu3Ti4O12, CCTO, and Na1/2Bi1/2Cu3Ti4O12) from a large family of perovskite-related compounds based on the general formula ACu3B4O12 have high intrinsic permittivity (> 100) at low temperatures and that appropriate doping (with Mn) can produce ceramics with encouraging microwave dielectric resonance properties at room temperature. The large values of intrinsic permittivity suggests some (as yet unknown) form of additional polarisation, other than ionic polarisation plays an important role in these compounds and that ACu3Ti4O12-type materials possess fundamentally interesting dielectric behaviour and potentially useful bulk dielectric properties after appropriate chemical doping. The aim of this study is therefore to prepare and characterise a wide variety of undoped and Mn-doped ACu3B4O12-type compounds to establish their structure-composition-property relationships. Particular emphasis will be given to optimising the bulk dielectric properties to assess their potential as commercially-useful high permittivity and/or temperature-stable dielectrics.

我们实验室的初步结果表明，基于通式ACu 3B 4 O 12的钙钛矿相关化合物大家族中的两个成员（CaCu 3 Ti4 O 12，CCTO和Na 12 Bi 12 Cu 3 Ti4 O 12）在低温下具有高固有介电常数（> 100），并且适当的掺杂（Mn）可以在室温下产生具有令人鼓舞的微波介电谐振性能的陶瓷。大值的固有介电常数表明一些（迄今未知）形式的额外的极化，离子极化以外的起着重要作用，在这些化合物和ACu 3 Ti4 O 12型材料具有根本上有趣的介电行为和潜在的有用的散装介电性能后，适当的化学掺杂。因此，本研究的目的是制备和表征各种各样的未掺杂和Mn掺杂的ACu 3B 4 O 12型化合物，以建立它们的结构-组成-性能关系。将特别强调优化体介电性能，以评估其作为商业上有用的高介电常数和/或温度稳定的介电常数的潜力。

项目成果

Incipient ferroelectricity and microwave dielectric resonance properties of CaCu2.85Mn0.15Ti4O12 ceramics

• DOI: 10.1063/1.2769954
• 发表时间: 2007-09
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: M. Li;A. Feteira;D. Sinclair;A. West

Origin(s) of the apparent high permittivity in CaCu3Ti4O12 ceramics: clarification on the contributions from internal barrier layer capacitor and sample-electrode contact effects

• DOI: 10.1063/1.3253743
• 发表时间: 2009-11-15
• 期刊: JOURNAL OF APPLIED PHYSICS
• 影响因子: 3.2
• 作者: Li, Ming;Shen, Zhijian;West, Anthony R.
• 通讯作者: West, Anthony R.

Soft-mode behavior and incipient ferroelectricity in Na 1 / 2 Bi 1 / 2 Cu 3 Ti 4 O 12

Na 1 / 2 Bi 1 / 2 Cu 3 Ti 4 O 12 中的软模行为和初期铁电性

• DOI: 10.1103/physrevb.81.224112
• 发表时间: 2010
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Ferrarelli M

Extrinsic origins of the apparent relaxorlike behavior in CaCu3Ti4O12 ceramics at high temperatures: A cautionary tale

• DOI: 10.1063/1.3572256
• 发表时间: 2011-04-15
• 期刊: JOURNAL OF APPLIED PHYSICS
• 影响因子: 3.2
• 作者: Li, Ming;Sinclair, Derek C.;West, Anthony R.
• 通讯作者: West, Anthony R.

Detection of heterogeneities in single-crystal CaCu 3 Ti 4 O 12 using conductive atomic force microscopy

使用传导原子力显微镜检测单晶 CaCu 3 Ti 4 O 12 的异质性

• DOI: 10.1088/1757-899x/8/1/012018
• 发表时间: 2010
• 期刊: Materials Science and Engineering
• 作者: Fiorenza P