A Research on Multi-functional Ceramic Based Nanocomposites

在纳米复合材料技术的基础上，我们提出了一种新的材料设计概念--多功能材料，即在复合材料中实现力学性能和电学性能等多功能。为了开发这样一种新材料，密切的国际合作研究是非常必要的。因此，我们提出了日美韩国际研究项目。该项目由日本大阪大学科学工业研究所、美国麻省理工学院和韩国科学技术学院三个著名的研究小组组成，旨在阐明改善力学性能和功能性能的机理，并应用该纳米复合技术和分子水平复合技术开发包括陶瓷、金属和聚合物基复合材料在内的各种多功能材料(中间材料)。最终目标…本项目更多的是在纳米复合材料技术的基础上，提出具有更好多功能的纳米/团簇复合材料的概念。本项目取得的主要成果如下：1)开发新的制备工艺，以获得高性能的陶瓷基纳米复合材料。开发了粉末制备和烧结的新工艺，包括原位复合工艺。这导致了陶瓷/陶瓷和陶瓷/金属纳米复合材料系统中高性能纳米复合材料的相继制备。2)多功能陶瓷复合材料的设计和开发。我们成功地获得了具有多种性能的新型纳米复合材料，其中的力学性能和功能性能都在一个复合材料中实现了。在陶瓷/金属纳米复合体系和功能陶瓷基纳米复合材料中，为结构陶瓷增加了新的功能，同时功能陶瓷(如铁电和离子导电材料)的力学性能得到了极大的改善。3)基于纳米和分子级结构控制构建的新型有机-无机复合材料的开发。将纳米复合材料技术和分子设计理念引入到聚合物材料中，开发出了高性能的纤维增强塑料和分子复合材料，这些材料在低温下仍表现出优异的力学性能和热性能，为实现多功能纳米和分子复合材料(中间材料)提供了可能性。较少

On the basis of the nanocomposite technology, we have proposed the new materials design concept "multi-functional materials" (Intermaterials), in which multi-functions such as mechanical and electric properties are realized in a composite. In order to develop such a novel material, close international collaboration researches is strongly required. Therefore, we have proposed Japan-United States-Korea international research project. Three famous research groups, the institute of Scienlific and Industrial Research, Osaka University (Japan), MIT of United States of America, and Korea Institute of Science and Technology, are joined in this project.The purpose of this project are to clarify the mechanisms of mechanical and functional properties improvements and to develop various kinds of multi-functional materials (Intermaterials) including of ceramic-, metal- and polymer-based composites by applying this nanocomposite technology and molecular-level compositing technology. The final target … More of this project is to propose the nano/cluster composite concept with better multi-functional properties, based on the nanocomposite technology.The main results obtained from this project is as follows :1) Development of new fabrication processing to obtain high-performance ceramic-based nanocomposites. Novel processing of powder preparation and sintering including in-situ compositing processes have been developed. This resulted in successive fabrication of high-performance nanocomposites in ceramic/ceramic and ceramic/metal nanocomposite systems.2) Design, development of multi-functional ceramic composites. We have succeeded to obtain new nanocomposites with multi-performance, in which both mechanical and functional properties have been realized in one composite materials. Here, adding new functions to structural ceramics as well as superior improvement of mechanical properties of functional ceramics (such as ferroelectric and ion conducting materials) have been succeeded in ceramitc/metal nanocomposite systems and functional-ceramic-based nanoconiposites.3) Development of novel organic-inorganic composites constructed by nano- and molecular-level structural control. By attempting nanocomposite technology and molecular design concept to polymer materials, high-performance fiber-reinforced plastics and molecular-composites have been developed.These materials indicated the superior mechanical and thermal properties even at cryogenic temperatures.All these results shows the possibility of realizing multi-functional nano- and molecular-composites (Intermaterials). Less