New synthetic processes and characterization of inorganic materials.

本课题组由三个研究小组组成，分别涉及气相-固相反应过程、液相-固相反应过程和固相-固相反应过程。每个成员都属于其中一个，并试图开发新的工艺制造先进的陶瓷与其他成员的持续合作。召开了两次全体成员参加的研讨会，对三个小组的研究结果进行了相互讨论，从原子和分子水平揭示了控制反应过程的各种因素。值得注意的几点归纳如下。(1)气-固反应过程;非氧化物材料薄膜（BN、Diamond等）并通过应用等离子体工艺制造固体电解质。确定了控制薄膜结构和性能的反应条件。激光化学气相沉积法也被发展用于制备非氧化物单晶薄膜。(2)液-固反应过程：讨论了溶胶-凝胶法制备陶瓷纤维（Al_2O_3、ZrO_2）的工艺过程。给出了金属氧化物水解的详细数据。熔体快淬法在制备高离子导电性非晶态氧化物中的应用受到了广泛的关注。(3)重点介绍了自熄燃烧法和热等静压法相结合的方法。讨论了该工艺的特点和实用性。插层法也是近年来研究的热点，应用该方法制备了多种新型功能材料。

This research group consists of three subgroups which concern with vappr to slid reaction process, liquid to solid reaction process and solid to solid reaction process, respectively. Each members has belonged to one of them and attempted to develop new process for fabrication of advanced ceramics with the continued cooperation of other members. Two symposia paticipated with whole members were held to discuss the results obtained in three subgroups with each other and to reveal various factors to controle the reaction process in the level of atom and molecule. Remarkable points are summerized as follows.(1) Vapor-Solid reaction process; Thin films of non-oxide materials (BN, Diamond et al.) and solid electrolytes were fabricated by applying plasma processes. The reaction conditions to controle the microstructure and properties of the films were established. Laser CVD method was also developed to fabricate single crystal films of non-oxides.(2) Liquid -Solid reaction process; Discussions on Sol-Gel methods were focused on the processing forming ceramic fibers (Al_2O_3, Zro_2). The details of the data about hvdrolvsis of metal alboxides were presented. Much attention was denoted to the rapid quenching of melts which was applied to preparation of amorphous oxides with high ionic condoctivity.(3) Solid-Solid reaction process; Self-Propagating Combution method combined with HIPing method was spotlighted. The characteristics and usefulness of the processing were discussed. Intercalation process has also become of interest in recent yeras and variuos new functional materials were prepared by applying the method.