Study of microstructure and electromechanical properties of ceramic-matrix piezocomposites PZT/α-Al₂O₃

Abstract

The electromechanical properties and microstructural features of ceramic-matrix piezocomposites PZT/α-Al₂O₃ with different volume fractions of microcrystalline α-Al₂O₃ filler were studied. The concentration dependences of the complex elastic and electromechanical parameters of piezoelectric elements on α-Al₂O₃ microcrystals concentration were measured. It was found that, along with the influence of the non-piezoelectric phase α-Al₂O₃, the microporosity of the piezoceramic matrix appearing during sintering plays a decisive role in the formation of the electro-physical properties of ceramic-matrix piezocomposites PZT/α-Al₂O₃.

Keywords:

• Microstructural features
• electromechanical characteristics
• ceramic-matrix piezocomposites
• complex constants
• piezoelectric resonance analysis

Additional information

Funding

The study was financially supported by the Ministry of Science and Higher Education of the Russian Federation (scientific project No. 0852-2020-0032 (BAS0110/20-3-08IF)).