Platform Renewal Proposal: MULTIFUNCTIONAL OXIDES MATERIALS TO DEVICES

平台更新提案：多功能氧化物材料到设备

基本信息

批准号：
EP/F067828/1
负责人：
Neil Alford
金额：
$ 105.85万
依托单位：
Imperial College London
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2009
资助国家：
英国
起止时间：
2009 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FF067828%2F1
关键词：
Platform Renewal Proposal MULTIFUNCTIONAL OXIDES

项目摘要

The original objectives of the Platform grant were:1. development of new materials2. characterisation3. theory and modelling development4. device developmentOur achivements against these objectives were:1 Microwave dielectric ceramics / Niobates / Pb Free pezoelectrics based on silver niobate / multiferroic/magnetoelectric materials including BiFeO32 First characterisation of BiFeO3 at microwave frequencies, rigorous models to determine properties in thin ferroelectric films, scanning evanescent wave microscopy3 Density Functional Perturbation Theory, mode matching for accurate values of loss and permittivity4 Devices / piezoelectrically tuned dielectric resonator filters Extra Outputs not anticipated: Development and patenting of core-less transformers (no ferromagnetic core at all) using layered pcb geometry.The Forward LookIn the new Platform the objectives are:1 To use the Platform flexibility to carry out speculative and adventurous research2 To develop thin film multilayers with particular emphasis on interfaces3 To develop novel devices, prototypes and applications4 To ensure that the expertise is maintained and that key postdoctoral staff can develop their careers and move to more senior positionsThe areas of research that we intend to explore are:* Fundamental chemistry of functional ceramicsThere is a need to focus on and understand the chemistry, crystal structure and physical properties of ceramics. This knowledge is vital as a reference point for the production of thin films, which are after all made from bulk ceramics targets. We will concentrate on three main groups of ceramics:I. Microwave dielectrics: II. Piezoelectrics: III. Multiferroics / magnetoelectrics: This builds on the group's expertise in the solid state chemistry and reactions of electronic and magnetic ceramics.* Thin functional oxide films / advanced characterisation methodsThe future trend will be towards nanoscale structures. Our core areas of research are: Materials development; thin film deposition; structural and electrical characterisation; device development. The future strategy requires extra expertise in the area of TEM (Professor McComb), electron holography (Harrison). * New device structures to test material propertiesWhilst a material's structural and electrical properties can and will be tested during development, a very useful method of testing a material is to assess its performance in a prototype device. This enables us to evaluate the different influences on performance. We will examine ultra High Q structures and frequency agile devices* Modelling of structures using density functional theoryLinear scaling DFT codes will faciltiate the study of the electrical properties of large superlattices and multilayered thin-films. The influence of substitutions and defects in bulk ceramic systems will also be accessible as will be the properties of large unit-cell crystals such as spinels and ferrites. Modelling will also complement the advanced characterisation techniques and fundamental solid-state chemistry areas of research.

平台资助的最初目标是： 1． 2.新材料的开发。表征3.理论和模型发展4。器件开发我们针对这些目标取得的成就是：1 基于铌酸银/多铁性/磁电材料（包括 BiFeO32）的微波介电陶瓷/铌酸盐/无铅压电体在微波频率下首次表征 BiFeO3，确定铁电薄膜特性的严格模型，扫描倏逝波显微镜3 密度泛函微扰理论，损耗和介电常数精确值的模式匹配4 器件/压电调谐介质谐振器滤波器预计不会有额外输出：使用分层 PCB 几何结构开发无芯变压器（根本没有铁磁芯）并获得专利。前瞻性在新平台中，目标是：1 利用平台的灵活性来开展投机性和冒险性研究 2 开发薄膜多层，特别强调界面3 开发新颖的设备、原型和应用4 确保专业知识得到保留，关键博士后人员能够发展他们的职业生涯并晋升到更高级的职位我们打算探索的研究领域分别是： * 功能陶瓷的基础化学需要重点关注和了解陶瓷的化学、晶体结构和物理性能。这些知识作为薄膜生产的参考点至关重要，毕竟薄膜是由块状陶瓷靶材制成的。我们将重点关注陶瓷的三大类：I.微波电介质：II。压电：III．多铁性/磁电学：这建立在该小组在电子和磁性陶瓷的固态化学和反应方面的专业知识的基础上。*薄功能氧化物薄膜/先进的表征方法未来的趋势将是纳米级结构。我们的核心研究领域是：材料开发；薄膜沉积；结构和电气特性；设备开发。未来的战略需要 TEM（McComb 教授）、电子全息术（Harrison）领域的额外专业知识。 * 用于测试材料特性的新器件结构虽然材料的结构和电气特性可以并且将会在开发过程中进行测试，但测试材料的一种非常有用的方法是评估其在原型器件中的性能。这使我们能够评估对性能的不同影响。我们将研究超高 Q 结构和频率捷变器件* 使用密度泛函理论进行结构建模线性缩放 DFT 代码将有助于研究大型超晶格和多层薄膜的电性能。块体陶瓷系统中的取代和缺陷的影响也将是可以理解的，大晶胞晶体（例如尖晶石和铁氧体）的特性也是如此。建模还将补充先进的表征技术和基础固态化学研究领域。