Hydrothermal preparation and electrical properties of Aurivillius phase SrBi₄Ti₄O₁₅ ceramic

ABSTRACT

The Aurivillius phase SrBi₄Ti₄O₁₅ (SBT) powders were synthesized by a hydrothermal reaction with 20% acetic acid solution as solvent at 200°C for 24 h, then the piezoelectric ceramic was prepared using the above powders. The results showed that well-crystallized SBT was identified at a hydrothermal temperature 200°C for 24 h. Plate-like morphology of the grains which is characteristic for layer-structure Aurivillius compounds was clearly observed. The sintered-SBT ceramics exhibited a high temperature of maximum dielectric permittivity (T_c = 530°C) with large piezoelectric constant (d₃₃ = 19pC/N) and remanent polarization (2P_r = 13.6 μC·cm⁻²).

KEYWORDS:

• SrBi₄Ti₄O₁₅
• hydrothermal method
• piezoelectric ceramic
• microstructure

Funding

This work was supported by National Natural Science Foundation of China (No. 51372110, 51402144, 51302124, 51302025 and 51502127), the National High Technology Research and Development Program of China (NO. 2016YFB0402701), the Natural Science Foundation of Shandong Province of China (ZR2016EMM02, ZR2014JL030), The Project of Shandong Province Higher Educational Science and Technology Program(No. J14LA11, No. J14LA10).