Abstract
BaBi4Ti4−x(Cu0.5W0.5)xO15 ceramics with Cu2+ and W6+ co-substitution for the B-site Ti4+ were prepared by using the solid-state reaction process. It was desirable that piezoelectric properties of the BaBi4Ti4−x(Cu0.5W0.5)xO15 ceramics could be improved by inducing the larger lattice distortion with the oxygen vacancy defects neutralized and restrained. Results of the X-ray diffraction analysis confirmed that crystal cell parameter c decreased obviously with the increase in the crystal cell parameter a. Curie temperature, resistivity, and piezoelectric properties of the BBT ceramics are improved by the copper and tungsten modification. The maximum value of piezoelectric coefficient (~ 30 pC/N) can be obtained in the BaBi4Ti4−x(Cu0.5W0.5)xO15 ceramics.
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