Abstract
ABSTRACT(Pb0.985-xBi2x/3La0.01)(Nb0.95Ti0.0625)2O6 with 2 wt% excess PbO (x = 0, 0.01, 0.04, 0.06, 0.1) piezoelectric ceramics with high Curie temperature were fabricated via a conventional solid-state reaction method. Dielectric and piezoelectric properties of the ceramics were studied. The Curie temperatures of the ceramics decrease with the increase in the Bi3+ amount. The values of dielectric constant remain nearly unchanged from room temperature up to about 400 °C for the ceramics with x = 0, 0.01, 0.04 and 0.06. The ceramic with x = 0.04 possesses high piezoelectric charge constant (87 pC/N), low mechanical quality factor (22.60), low dielectric loss (0.024), and high Curie temperature (494 °C).
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