Preparation and electrical performance of BCHT lead-free piezoelectric ceramics via powder injection molding

Abstract

(Ba_0.85Ca_0.15)(Hf_0.10Ti_0.90)O₃ (BCHT) lead-free piezoelectric ceramics were synthesized via the powder injection molding process sintered at several temperatures, in which the BCHT ceramics were prepared by the conventional ceramic processing sintered at the optimized temperature 1450 °C for comparison. All the synthesized BCHT ceramics exhibit rather pure perovskite phase structure, where the BCHT ceramics prepared via the powder injection molding process present more apparent multiphases coexistence characteristic. The electrical properties of the BCHT ceramics prepared via the powder injection molding process are slightly better than those prepared by the solid-state sintering method, which correlate with the increase of ceramics densification and the change of grains micro-morphology. The powder injection molding technique provides a feasible way to synthesize irregular shaped piezoelectric ceramics with excellent electrical performance.

Keywords:

• BaTiO3-based ceramics
• powder injection molding
• perovskite structure
• electrical properties

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (Nos. 51577015, 51602031), the Applied Basic Research Programs of Changzhou (No. CJ20179020), the Top-notch Academic Programs Project of Jiangsu Higher Education Institutions and the Priority Academic Program Development of Jiangsu Higher Education Institutions.