Effect of Ti content on energy storage properties of (Pb_0.87Ba_0.10La_0.02)(Zr_0.60Sn_0.40-xTi_x)O₃ bulk ceramics

ABSTRACT

(Pb_0.87Ba_0.10La_0.02)(Zr_0.60Sn_0.40-xTi_x)O₃(PLBZST) (x = 0–0.20) bulk ceramics were prepared by the conventional solid state method, and the dependence of phase transformation, ferroelectric properties and energy storage properties on x values has been investigated. When x = 0.12, the unit cell volume significant change indicted the phase transformation of the ceramics. As x = 0.04–0.10, the PLBZST ceramics possess anti-ferroelectric phase with high recoverable energy storage density 0.8–1.3 j/cm³ and when x = 0.12–0.20, the ceramics with ferroelectric phase have lower density values about 0.2–0.3 j/cm³. The phase switching electric field, saturation polarization and test temperature have an important influence on energy storage density and efficiency. As a result, the PLBZST bulk ceramics exhibit the largest recoverable energy density of 1.3 j/cm³ with efficiency of 77.4% at 20°C.

KEYWORDS:

• PLBZST ceramics
• energy storage
• anti-ferroelectric properties

Funding

This work is supported by the National Natural Science Foundation of China (Grant nos. 51572162), and the Fundamental Research Funds for the Central Universities (GK201604006, 2016CBZ007).