Abstract
To research effect of raw materials TiO2 with the phase structures on the crystal structure, microstructure and electrical properties of lead-free (Ba0.85Ca0.15)(Ti0.90Zr0.10)O3 (BCZT) ceramics, BCZT ceramics using either anatase or rutile as Ti source were synthesized by solid-state reaction. Titanium dioxide (TiO2) with anatase/rutile phase structures had interesting influence on the crystal structure, microstructure and the sintering temperature by the X-ray diffraction and SEM, which also played an important role in improved electrical properties. The BCZT ceramics with rutile titanium dioxide demonstrated optimal piezoelectric and dielectric properties: d33=590 pC/N, kp=0.46, εr=2810, tanδ=0.014 and Tc=91°C, which was obviously superior to BCZT ceramics with anatase titanium dioxide.
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