Fabrication of Ceramic Composite Composed of Single Crystals and Ceramic Matrix using a Hybrid Sintering

概要

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It was shown in the previous work that the hybrid sintering process using microwave heating and hot-pressing offers advantages over the conventional technologies in the fabrication of piezoelectric ceramics. On the basis of these, the authors predicted that the hybrid process might be applied to the fabrication of the ceramic composite from small single crystal grains and powder of relaxor-type material. In this study, the fabrication of a ceramic composite consisting of 0.79PNN–0.21PT (PNN–PT) single crystals in a 0.5PNN–0.15PZ–0.35PT (PNN–PZT) ceramic powder using the hybrid process is investigated and the results demonstrate the feasibility of the hybrid process for the fabrication of ceramic composites. The specimen fabricated by the hybrid sintering process has a clear boundary between the single crystals and the ceramic matrix but almost no clack. The ratio of the ingredients changes more significantly in the specimens fabricated by the hybrid sintering process from their initial ratio than that in the conventionally sintered specimens. The increase of Zr in the single crystal of the ceramic composite sintered by the hybrid process is due to the diffusion of Zr from the ceramic matrix.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2003-12-15