Preprints of Annual Meeting of The Ceramic Society of Japan<br> Preprints of Fall Meeting of The Ceramic Society of Japan

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In order for automobiles to be developed as a means of transportation that continues to provide the convenience of mobility in the future, it is important to minimize their negative effects on the environment, traffic accidents, and traffic congestion. With the aim of achieving an affluent mobile society, Toyota has long contended that this social task is extremely important and has been actively involved in addressing it. With regard to environment, Toyota has been actively developing hybrid technology that is considered a core technology for the solution of three major issues: 1) improving fuel efficiency in order to reduce CO2 emissions, 2) developing exhaust emissions abatement systems to minimize atmospheric pollution, and 3) pursuing energy diversification. In terms of safety, Toyota's vehicle development aims to provide optimal driving support based on driving conditions, not only by integrating individual safety technologies and systems in the vehicle, but also by adopting an infrastructure-respondent system. By increasing such integration in the future, Toyota seeks to reduce dangers related to vehicle use as we pursue vehicles that do not cause accidents. Nanotechnologies have shown great potential and are expected to produce the breakthrough technologies that will yield innovative solutions to the above issues surrounding automotive transportation.

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Slurry spreading type gas diffusion electrode for integrated fuel cell was proposed. By using this new type gas diffusion electrode, thickness of electrode can be controlled and it can be fabricated into various shapes of substrate. By utilizing this property, the resistance of MEA can be reduced and hence high MEA performance can be achieved. Furthermore this gas diffusion electrode needs only low temperature (80-150C) heat treatment and therefore the MEA fabricated can be manufactured at a low cost.

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To achive emission clean and engine power up,we developed a piezoelectric actuator with high reliability for a diesel injection system.Its key design is an unique piled up structure of piezo units to be able to operate more than ten billion times.

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This study examined the influence of the addition of Zn, or Mn to (K,Na)(Nb,Ta)O3-KCT (KNNT-KCT) ceramics. Piezoelectric properties was remarkably improved by the addition of Mn , and the sintered body shows large piezoelectric constant of d33=195pC/N.

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