Influence of thermal cycling rate and sintering temperature of barium titanate and barium strontium titanate ceramics on their dielectric properties

Abstract

One of the negative effects of ferroelectric applications, particularly for electrocaloric effect (ECE) applications, is temperature hysteresis (ΔT_Hyst). Temperature hysteresis is the difference between the temperatures corresponding to the maximum dielectric permittivity in heating and cooling modes. The value of ΔT_Hyst is commensurate with the value of the ECE temperature change. The ECE is a phenomenon in which a material shows a reversible temperature change under an applied electric field. The aim of this work is to study the possibilities of temperature hysteresis reduction by varying the ceramic sintering temperature, changing the stoichiometry of Ba_xSr_1-xTiO₃ solid solutions, and changing the rate of the heating-cooling cycle.

Keywords:

• Ferroelectrics
• barium titanate
• barium strontium titanate
• electrocaloric effect
• temperature hysteresis

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The reported study was funded by the RFBR (Research Project No. 20-58-26015) and Ministry of Education and Science of Russian Federation (grant No. FSEE-2022-0017).