Investigation on F R(LT)–F R(HT) phase transition and pyroelectric properties of porous Zr-rich lead zirconate titante ceramics

Abstract: The F R(LT)–F R(HT) phase transition and pyroelectric properties of porous Zr-rich lead zirconate ceramics were investigated. There was a relatively slight change of dielectric constant and a maximum peak of pyroelectric coefficient during F R(LT)–F R(HT) phase transition. The F R(LT)–F R(HT) and F R(HT)–P C phase transition temperature changed slightly with an increase in porosity The dielectric constant and pyroelectric coefficient at F R(LT)–F R(HT) phase transition temperature decreased with increasing porosity. However, the pyroelectric figure of merit (F v) increased with an increase in porosity due to a further decrease in dielectric constant with increasing porosity. When porosity exceeded 18.7%, the figure of merit of porous PZT ceramics was higher than that of dense PZT ceramics, which demonstrated figure of merit of PZT ceramics can be enhanced by inducing porosity. [Copyright &y& Elsevier]