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A heat-electric energy generator working on FR(LT)-FR(HT) phase transition in Nb doped PZT97/3 ceramics has been established. Under the working condition that resistance load R=10Mω and pumping frequency f=0.074Hz, the output energy density per cycle 8.18mJ/cm3-cycle is obtained with energy conversion efficiency 0.31%.
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Dai et al. (1990) studied this question.
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