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Studies of dielectric oxides as a function of field and temperature using scanning transmission electron microscopy

使用扫描透射电子显微镜研究介电氧化物随场和温度的变化

基本信息

批准号：
1990429
负责人：
金额：
--
依托单位：
University of Glasgow
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2017
资助国家：
英国
起止时间：
2017 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-1990429
关键词：
Studies dielectric oxides function field

项目摘要

Developing high temperature dielectric materials is important for a range of industrial areas, as this would enable electronic controls to be placed closer to the warm zone of a device such as an engine and therefore improve the operation. This project is therefore of benefit to a range of areas and especially as concerns energy-efficient transportation, and thus touching on key EPSRC and national priorities related to Energy. The specific aim of this project is to develop microscopy techniques for the analysis of the structure and local polarisation of such materials in-situ, under both elevated temperature and electrical bias. It is being performed in parallel to the EPSRC-funded project, EP/P013945/1, "Analysis of Polar Structure in High Temperature Relaxor Dielectrics: Framework for Materials Discovery". Materials are mainly being provided through this project from the group of Dr Steven J Milne at the University of Leeds, where this new class of high temperature dielectrics has been developed. The methods will combine a number of new developments including combined heating and biasing of transmission electron microscope specimens on a MEMS chip via a collaboration with DENS solutions BV, and pixelated detection of scattered and diffracted electrons in scanning transmission electron microscopy using recently developed detectors. This latter area was extensively developed at Glasgow through the project "Fast Pixel Detectors: a paradigm shift in STEM imaging" (EP/M009963/1), and this work also represents a continuation of that work and its application to a specific problem in the applied materials science of functional oxides.

开发高温介电材料对一系列工业领域非常重要，因为这将使电子控制更接近发动机等设备的温区，从而改善操作。因此，该项目有益于一系列领域，特别是在节能运输方面，因此涉及到EPSRC和与能源有关的国家优先事项。该项目的具体目标是开发显微技术，用于在高温和电偏压下原位分析此类材料的结构和局部极化。它与EPSRC资助的项目EP/P013945/1“高温弛豫电介质的极性结构分析：材料发现框架”并行进行。材料主要是由利兹大学的Steven J Milne博士小组通过这个项目提供的，在那里已经开发出了这种新型的高温电介质。这些方法将结合一些新的开发，包括通过与DENS解决方案公司的合作在MEMS芯片上对透射电子显微镜样品进行联合加热和偏置，以及使用最新开发的探测器在扫描透射电子显微镜中对散射和衍射电子进行像素化检测。格拉斯哥通过“快速像素探测器：STEM成像中的范式转变”项目(EP/M009963/1)广泛开发了这一领域，这项工作也是这项工作的继续，并将其应用于功能氧化物应用材料科学中的一个具体问题。