低温相粉体を用いた緻密な圧電性PbNb_2O_6の作製

概要

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The effect of microstructure on dielectric and piezoelectric properties of PbNb_2O_6 was studied to examine the possibility of using powder with the low-temperature rhombohedral form for the preparation of piezoelectric PbNb_2O_6 ceramics. Dense, fine-grained PbNb_2O_6 ceramics with good piezoelectric property with the maximum k_t value of 0.315 were obtained by rapid heating and isothermal soaking at 1250℃ of powders with particle size between 0.7 and 1.0μm. The use of coarse powder resulted in the development of large grains and pores caused by exaggerated grain growth induced by phase transformation from the low-to high-temperature forms. Isothermal soaking at 1300℃ resulted in the formation of a duplex structure. These structural defects reduced the piezoelectric property.
社団法人日本セラミックス協会の論文
2005-08-01