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

可控微结构纳米介电和电致伸缩粉末的加工：最终晶粒尺寸对相变和介电性能的影响

• 批准号: 9417468
• 负责人: Abhaya Datye
• 金额: $ 26.24万
• 依托单位: University of New Mexico
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-01 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9417468&HistoricalAwards=false
• 关键词: Processing; Controlled; Microstructure; Nanosized; Dielectric

9417468 Datye 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. Additional funding is provided to augment the ongoing research program and provided for a membership in the Center with funds provided by the U.S. Department of Air Force, Kirtland AFB. The Program Manager recommends the University of New Mexico be awarded $75,000 for 36 months through a "TIE" project with Rutgers University. An additional $29,448 is recommended for one year with funds provided by the U.S. Department of Air Force, Kirtland, AFB.

9417468 Datye 这项研究的主要目的是研究晶粒尺寸对重要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、钛酸铅和铌镁酸铅。 该研究由新墨西哥大学微工程陶瓷工业/大学合作研究中心和罗格斯大学陶瓷工业/大学合作研究中心联合进行。 新墨西哥大学正在通过一种新型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。 使用光谱、显微镜和表面积技术对粉末进行表征。 所采用的加工技术包括干压、热等静压和刮刀流延。 将使用膨胀测定法研究致密化行为。 介电性能也得到了表征。 这种共同努力是一种自然的合作，因为它利用了每个机构的优势，并且产生的结果超过了每个单独工作的产出总和。 这项研究对于电子陶瓷行业来说非常及时。 这项研究的结果将有助于薄膜多层静电/压电器件的制造商。 美国空军部科特兰空军基地提供了额外的资金来扩大正在进行的研究项目，并为该中心的会员提供资金。 项目经理建议通过与罗格斯大学的“TIE”项目向新墨西哥大学提供为期 36 个月的 75,000 美元资助。 建议一年额外提供 29,448 美元，资金由位于科特兰空军基地的美国空军部提供。