Processing of Controlled-Microstructure Nanosized Dielectricand Electrostrictive Powders: The Effect of Final Grain Size on Phase Transitions and Dielectric Properties

小行星9417469 本研究的主要目的是研究晶粒尺寸对重要的介电和电致伸缩材料的相变和介电性能的影响，包括：钛酸钡，钛酸铅，和铅镁钛酸盐。 这项研究是由新墨西哥州大学的微工程陶瓷工业/大学合作研究中心和罗格斯大学的陶瓷工业/大学合作研究中心联合进行的。 新墨西哥州大学正在通过一种新颖的气溶胶分解工艺生产具有受控微观结构、化学纯度和纳米尺寸的前体粉末。 粉末的特点是使用光谱，显微镜，和表面积技术。 所采用的加工技术包括干压、热等静压和刮刀流延。 将使用密度测定法研究致密化行为。 介电特性也被表征。 这种联合努力是一种自然的协作，因为它利用了每个机构的优势，其结果超过了每个单独工作的产出之和。 本研究对电子陶瓷行业的发展具有重要的现实意义。 本研究之结果可供多层薄膜静电/压电元件制造业参考。 项目经理建议罗格斯大学通过与新墨西哥州大学的“TIE”项目获得36个月的75，000美元。

9417469 Safari The primary objective of this research is to study the effects of grain size on the phase transitions and dielectric properties of important dielectric and electrostrictive materials including: barium titanate, lead titanate, and lead magnesium niobate. The research is being performed jointly between the Industry/University Cooperative Research Center for Microengineered Ceramics at the University of New Mexico and the Industry/University Cooperative Research Center for Ceramics at Rutgers University. Precursor powders, with controlled microstructures and chemical purity and nanosized dimensions, are being produced via a novel aerosol decomposition process at the University of New Mexico. The powders are characterized using spectroscopy, microscopy, and surface area techniques. Processing techniques being employed include dry pressing, hot isostatic pressing, and doctor blade tape casting. Densification behavior will be studied using dilatometry. The dielectric properties are being characterized also. This joint effort is a natural collaboration , as it utilizes the strengths of each institution, and results in more than the sum of the output for each working separately. The research is very timely for the electronic ceramics industry. The results of this research will be of use to manufacturers of thin film multilayer electrostatic/piezoelectric devices. The Program Manager recommends Rutgers University be awarded $75,000 for 36 months through a "TIE" project with the University of New Mexico.