Effects of pore sizes on the electrical properties for porous 0.36BS–0.64PT ceramics

• Published in: Journal of materials science. Materials in electronics 2017-07, Vol.28 (13), p.9309-9315
• Main Authors: Tan, Jinting, Li, Zhenrong
• Format: Article
• Language: English
• Subjects: Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Coupling coefficients; Electrical properties; Figure of merit; Grain boundaries; Grain growth; Grain size; Laboratories; Materials Science; Microstructure; Optical and Electronic Materials; Particle size; Permittivity; Piezoelectricity; Polymethyl methacrylate; Polystyrene resins; Polyvinyl chloride; Pore formation; Pore size; Porosity; Q factors; Scanning electron microscopy; Sintering; Ultrasonic transducers
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-017-6668-1

Porous BiScO 3 –0.64PbTiO 3 (0.36BS–0.64PT) ceramics were fabricated by using burnable plastic sphere technique. Self-synthesized polystyrene microsphere (PS, φ0.36 μm) and poly methyl methacrylate (PMMA, φ2, 10 and 18 μm) micro-balls were selected as PFA. The porosity, microstructure and electrical properties were investigated for porous 0.36BS–0.64PT ceramics fabricated with different particle sizes of pore forming agents (PFA). With increasing particle sizes of PFA, the pore size and porosity increased. Meanwhile relative permittivity ( ε r ), piezoelectric coefficient ( d 33 , − d 31 ) and electromechanical coupling coefficients ( k p , k t ) decreased. The mechanical quality factor ( Q m ), elastic coefficient ( s 11 ), hydrostatic voltage coefficient ( g h ) and hydrostatic figure of merit increased accordingly. Finally, the effects of particle sizes of PFA on the microstructure and electrical properties were discussed.