For fabrication of ceramics with high uniformity, performance, and reliability, it is needed to minimize defects, such as hard agglomerates and pores. The forming process for the starting powder preparation process is very important in the fabrication of ceramic parts, as defects introduces during these processes will normally remain in the product even after successful sintering. It is well known that colloidal processing is a promising method to produce complex shaped parts and is suitable for fabrication near net shape components for which little machining is required. In this method, enhancement of the dispersion and fluidity of colloidal particles is a key technique. Also shaping through aqueous media is especially important in terms of environmental impact, safety, and cost. We have been studying the colloidal processing using aqueous solution and the hydrolytic behavior of metal ions in aqueous solution.

In addition, we are also studying as follows,

･Synthesis of aqueous oxide precursor solutions as new dispersants for preparing oxide powder suspensions, starting materials for oxide ceramics and environmental resistant coating materials,

･Fabrication of oxide colloidal particles as pigments for ink-jet printing, filers and UV-IR shielding materials,

･Colloidal titration for a simple and convenient determination of aqueous zirconium species, etc.

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