作者：MASAHIRO YOSHIMURA;
作者單位：Material and Structure Laboratory, Tokyo Institute of Technology 4259, Nagatsuta, Midori, Yokohama-shi, Kanagawa 226-8503, Japan
刊名：Journal of the Technical Association of Refractories
ISSN：0285-0028
出版年：2008-01-05
卷：28
期：2
起頁：67
止頁：75
分類號：TQ175
語種：英文
關鍵詞：solution;ceramics;soft process;soft-gel;films;
內容簡介Based upon thermodynamic considerations for materials processing, various solution processing methods appear to be the most energetically (environmentally) favorable techniques. Solution processing methods for ceramics are critically reviewed with emphasis on their merits and demerits. Confusion is pointed out in the definitions of various methods such as precipitation, colloid, sol-gel, polymer-gel, complexed-gel (polymerized complex), soft process (soft solution process) and/or more widely, solution deposition, chemical solution deposition, bio-mimetic, bio-inspired, ink-jet, spray, etc. In particular, for ceramic films and patterns, the conventional methods where firing is essential after coating of a solution precursor might be not far from solid (powder) processes. This is especially true when significant chemical reactions are not involved during the coating processes and most reactions such as pyrolysis, compound formation (synthesis), crystallization, consolidation, substrate adhesion, etc., occur in the solids by heat. Alternative methods where chemical reactions at the interface between a solution and a substrate solid and/or a reactant are described as typical Soft Processing Methods. In addition to the production of nano-crystals of SrTiO_3, Zr_(0.6)Ce_(0.4)O_2, etc., direct fabrication of LiCoO_2 and PbS films in solutions at room temperature to 150 deg C without post firing are described. "Direct Patterning of Ceramics" has also been proposed.
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