Analyses and syntheses of ferroelectric refrigeration ceramics

Cryogenic refrigeration could be realized by using the electrocaloric effect (i.e. inverse pyroelectric effect) of ferroelectric materials. Recent progresses implied that ferroelectric refrigeration may be a possible new technique of cryogenic refrigeration operated near room temperature. The analyses and syntheses of ferroelectric refrigeration ceramics of PMN-PT system are presented in this paper.