Publisher : The Korean Institute of Electrical and Electronic Material Engineers
DOI : 10.4313/JKEM.2016.29.2.90
Title & Authors
Microstructure and Piezoelectric Properties of Low Temperature Sintering PMW-PNN-PZT-BF Ceramics According to PNN Substitution Sin, Sang-Hoon; Yoo, Ju-Hyun;
In this work,  (x=0.02 to 0.12) composition ceramics were fabricated by the conventional soild state reaction method and their microstructure and piezoelectric properties were investigated according to PNN substitution. The addition of small amount of , , and were used in order to decrease the sintering temperature of the ceramics. The XRD (x-ray diffraction patterns) of all ceramics exhibited a perovskite structure. The sinterability of PMW-PNN-PZT-BF ceramics was remarkably improved using liquid phase sintering of , . However, it was identified from of the X-ray diffraction patterns that the secondary phase formed in grain boundaries decreased the piezoelectric properties. According to the substitution of PNN, the crystal structure of ceramics is transformed gradually from a tetragonal to rhombohedral phase. The x=0.10 mol PNN-substituted PMW-PNN-PZT-BF ceramics sintered at showed the optimum values of piezoelectric constant(), piezoelectric figure of merit(), planar piezoelectric coupling coefficient() and density : [pC/N], , , , density=7.82 , suitable for duplex ultrasonic sensor application.
PMW-PNN-PZT;PNN substitution;Piezoelectric properties;Low temperature sintering;
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