Article ID Journal Published Year Pages File Type
8948519 Ceramics International 2018 19 Pages PDF
Abstract
Lead-free piezoelectric material with excellent piezoelectric properties and high Curie temperature is necessary for practical applications. In this work, (Nd, Ce) co-doped CaBi4Ti4O15 (CBT) ceramics were prepared by the conventional solid-state reaction technique. The effect of (Nd, Ce) co-doping on the structure and resulting electrical properties of CBT ceramics was systematically investigated. The optimized comprehensive performances were obtained at x = 0.075 with a large piezoelectric coefficient (19 pC/N), a low dielectric loss (0.073%) and a high Curie temperature (794 °C). More importantly, the ceramic also maintained a very high resistance and a low dielectric loss even at 400 °C (ρ = 2.5 × 108 Ω cm, tan δ = 1.96%) and the d33 showed no sign of waning after annealed at 400 °C, which shows great potential for high temperature piezoelectric device applications. Related mechanisms for the enhancement of electrical properties were discussed.
Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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