Research and Development of Wet Forming Technology for Fine Ceramics

Ceramics are characterized by their heat-resistance chemical durability and high resistance to wear in comparison with resins and metals. The forming of ceramics is essential to the realization of the practical uses of engineering ceramics.The purpose of this R&D program is to develop wet forming technology in solids and water systems that will lead to a reduction in costs and create a more environmentally conscious process without the use of organic solvents and resins. A surface treatment technology for ceramic powders is under development to prepare slurries which are well dispersed and have high solid contents, as well as green bodies which have high plasticity. In addition, an evaluation method is also being investigated for the plasticity of ceramic green bodies. Furthermore, computer simulations will be applied to study the deformation process of ceramic green bodies.

Study on Nonlinear Acoustics

Shock waves used to break kidney stones and roaring sound from jet planes propagate in a different manner than ordinary sound; these are called nonlinear acoustics and are drawing attention. Distortion of the waveform and changes in sound attenuation can be used to evaluate dynamic characteristics of material. The force of ultrasound acts on propagating medium and on suspending particles, which enables the control of agglomeration and dispersion of fine particles. Using actions of acoustic cavitation jointly, sonochemistry exploits frontiers of mesoscopic material processing.

Molecular Design for Spin-sensing and Self-curing Material

Degradation of a material proceeds with breaking of the chemical bonds to produce transient electron-spin pairs. There-fore, the dynamic property of the transient spin pairs should be essential information to develop the self-curing material. The main concern of the present research is to clarify the quantum mechanical property of this spin pair.

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