Basic Studies on the Development for Ceramic/Metal/Organic Intermaterials

在本研究项目中，我们专注于开发具有优异多功能性的中间材料。在过去的几十年里，我们一直专注于设计纳米复合材料与陶瓷基材料，并成功地开发了几种纳米复合材料。基于这一概念，我们将材料系统扩展到金属和有机复合材料。所有这些结果暗示了在纳米和分子水平上控制材料的多功能性的可能性。因此，我们集中精力在陶瓷/金属/有机体系中开发这类高性能材料，即“中间材料”。(1)通过开发新的材料加工方法，在氮化硅、氧化铝和氧化锆陶瓷中制备了多种陶瓷基纳米复合材料。这些材料在机械、磁、电等方面表现出优异的综合性能。所有这些性质都可以用尺寸效应来解释。 关于我们 纳米第二相分散在陶瓷基体中。(2)在陶瓷材料中加入少量的掺杂剂，可以在分子水平上改变材料的结构。这些材料似乎是单块相，但发现具有原子和/或簇（分子）水平的不均匀性以显示增强的性质。(3)利用超声波辅助自组织技术成功地制备了陶瓷/金属和聚合物/陶瓷复合材料。这些材料可以在室温下制备，无需任何热能。对于聚合物/陶瓷材料，通过添加导电颗粒实现了新型触觉传感。这种材料通过施加应力改变其电子传导性，因此观察到优异的响应。该复合材料也已作为触觉传感器在商业上得到应用。总之，本研究项目已成功地开发了由陶瓷、金属和有机材料组成的原子级、团簇级和纳米级的新型中间材料。所有这些结果可能是一种新的材料“中间材料”的第一个阅读案例，它可以解决即将到来的世纪的各种问题。少

In this research project, we have focused on the development of intermaterials with excellent multifunctionality. For over the decades we have concentrated to design nanocomposite with ceramic-based materials, and succeeded to develop several kinds of the nanocomposites. Based on this concept we extend the materials system to metal and organic composites. All of these result imply us the possibility of multiple functionality of materials with the nano-and molecular-level control. Therefore we have concentrated to develop such high-performance materials in ceramic/metal/organic system, that is "Intermaterial".In this research, followed results have been obtained.(1) By developing new materials processing method, several kinds of ceramic-based nanocomposites have been fabricated in silicon nitride, alumina and zirconia ceramics. These materials exhibited excellent multiple properties in mechanical, magnetic and electric functions. All these properties were explained by the size effect of … More nanosized second phase dispersion in ceramic matrices.(2) When small amount of dopant was added into ceramics, materials structures have been modified in molecular-level. These materials seems to be monolithic phase but was found to have atomic and/or cluster (molecular) leveled inhomogeneity to show enhanced properties.(3) Ceramic/metal and polymer/ceramic composite materials have been successively prepared by using ultrasonic-assisted self-organization processes. These materials could be prepared at room-temperature without any thermal energies. For the polymer/ceramic materials, novel tactile sensing has been achieved by addition of conductive particles. This material varied its electron conductivity by applied stresses and thus excellent response have been observed. Also this composites have commercially applied as a tactile sensor.In conclusion this research project has successively conducted to develop novel intermaterials consisted of ceramic, metal and organic materials composed at atomic, cluster and nanometer-scale. All these results might be a first reading case for the new kind of material "intermaterial" which can solve various problem toward the coming 21st century. Less