Abstract

Relaxor ferroelectric Pb(Mg 1/3Nb 2/3)O 3–PbTiO 3 (65/35) and 10% PbZrO 3-doped Pb(Mg 1/3Nb 2/3)O 3–PbTiO 3 (65/35) ceramics were both prepared by a modified precursor method, which was based on the high-temperature synthesis of an oxide precursor that contained all the B-site cations for the consideration of B-site homogeneity. The dielectric properties of Pb(Mg 1/3Nb 2/3)O 3–PbTiO 3 (65/35) ceramic was more of normal ferroelectric behavior, but the high dielectric constant ( ɛ m = 34,200 at 1 kHz) and piezoelectric constant ( d 33 = 709 pC/N) were observed for this composition close to the morphotropic phase boundary. Comparatively, introduction of 10% PbZrO 3 into Pb(Mg 1/3Nb 2/3)O 3–PbTiO 3 (65/35) ceramics enhanced the diffuse phase transition as well as the rhombohedral to tetragonal phase transition temperature, while it also kept the high dielectric constant ( ɛ m = 29,600 at 1 kHz) and piezoelectric constant ( d 33 = 511 pC/N).

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