焼結におよぼす成形圧力の影響 (PbOとPZTの焼結に関する研究-5,6-)

概要

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The effects of the forming pressure on the sintering between PbO and PZT were investigated with a thermal dilatometer, an electron microscope and the measurement of the isothermal shrinkage and the electro-mechanical coupling coefficient.<BR>The extent of the expansion and the shrinkage on heating depended on the forming pressure. The forming pressure gave the influence to the rearrangement stage, but not to the solution-reprecipitation and the grain growth of PZT which proceeded under nearly the same process. The good values for the physical properties (sintered density, apparent porosity, and water absorbing ratio) were attained with increase in the forming pressure. In case of the hydrostatic press, better values were obtained than in case of the usual forming method. It was found that there exists a close relation between the sintered density and the electro-mechanical coupling coefficient and also the latter was based on the polarizing conditions.
社団法人粉体粉末冶金協会の論文