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Effect of Temperature Path on the Poling of Commercial Hard PZT Ceramics and its Implication for Mass Production
S. Esslinger, P. Neumeister, A. Schönecker
Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Winterbergstr. 28, 01277 Dresden, Germany
received July 19, 2013, received in revised form August 27, 2013, accepted October 18, 2013
Vol. 4, No. 4, Pages 213-216 DOI: 10.4416/JCST2013-00018
Abstract
In order to identify process parameters for the efficient poling of hard piezoelectrics in mass production, the effect of temperature modification during poling is investigated for a commercial hard PZT in the temperature range from 25 °C to 150 °C. While an electric field is applied, the temperature of the specimens was kept constant or the specimens were heated or cooled. The resulting piezoelectric performance was evaluated on the basis of the planar coupling factor at room temperature. An optimal poling temperature associated with maximum piezoelectric performance was found for poling with constant temperature. However, for poling while cooling, even higher performance is attained if the starting temperature is high enough. If poling becomes necessary after fabrication at high temperature, the cooling period could be exploited. The observed correlation between permittivity and the coupling factor could be exploited in quality control.
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Keywords
Piezoceramic, hard PZT, polarization, serial production
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