Effect of sintering temperature on structure and electrical properties of ZnO-added (Bi0.5Na0.5)0.94Ba0.06TiO3 lead-free ceramics

作者：Qiu, Yanzi^*; Yu, Zide^*

来源：Journal of Materials Science: Materials in Electronics , 2023, 34(2).

DOI：10.1007/s10854-022-09495-w

• PIEZOELECTRIC PROPERTIES
• DEPOLARIZATION TEMPERATURE
• DIELECTRIC-PROPERTIES
• THERMAL-STABILITY
• A-SITE
• MICROSTRUCTURE
• SYSTEM
• RADII

The 0.3 mol ZnO-added (Bi0.5Na0.5)0.94Ba0.06TiO(3 )(abbreviated as BNBT-ZnO) ceramics were prepared via the solid-state reaction technique at sintering temperatures of 1000 degrees C to 1050 degrees C. The ceramics exhibit two phases, i.e., BNBT phase and ZnO phase, according to the results of XRD and element mapping. With the increase in sintering temperature, the movement of the XRD peaks to a lower angle is observed, indicating the entrance of Zn-2? ions into the BNBT lattice. The relative density is higher than 97% for ceramics sintered at 1010-1040 degrees C. With the increase in sintering temperature, the average grain size of ceramics increases from 0.5 to 1.1 lm. According to analysis using the Curie- Weiss and modified Curie-Weiss laws, the BNBT-ZnO ceramics exhibit dielectric relaxation behavior. All ceramics have well-saturated P-E loops, and the Pr and Pm display the maximum values of 24.8 lC/cm(2) and 30.6 lC/cm(2 )sintered at 1040 degrees C. The ceramic sintered at 1040 degrees C exhibits dense microstructure and obtained the optimized electrical properties, the average grain size is 1.0 lm, and the d(33) and T-d reach high values of 110 pC/N and 97 degrees C.