Skip to main content

Phase Transition and Electrical Properties of Ba0.7Ca0.3TiO3BiFeO3 Ceramics

Buy Article:

$43.00 plus tax (Refund Policy)

Lead‐free piezoelectric ceramics of (1 − x)Ba0.70 Ca0.30TiO3xBiFeO3 [(1 − x)BCT–xBF,= 0–0.065] have been prepared and investigated. The ceramics with  0.06 have diphasic tetragonal and orthorhombic crystal structures, whereas tetragonal phase is suppressed by the introduction of BF. As a result, the composition with = 0.065 is found to have diphasic pseudocubic and orthorhombic phases. Significantly composition‐dependent grain size is observed. With increasing x from 0 to 0.065, the ferroelectric‐paraelectric phase transition temperature decreases monotonically from 128°C to 50°C, accompanied by enhanced ferroelectric relaxor behavior, as indicated by the widened diffused phase transition temperature. The room temperature polarization–electric field (P–E) hysteresis loops and strain–electric field (S–E) curves indicate that the ferroelectricity enhances slightly and reaches the maximum near = 0.05, and then weakens with increasing x. On the other hand, the piezoelectric coefficient (d 33 ) and electromechanical coupling coefficient (k p) decrease simultaneously with increasing x, whereas the mechanical quality factor (Q m) reaches the maximum near = 0.05. The structure‐property relationship is discussed intensively. Our results may be helpful for further understanding and designing BaTiO3‐related lead‐free ferroelectric/piezoelectric materials.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Document Type: Research Article

Publication date: 2012-12-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more