Research on Preparation and Properties of Interfacial Sintering Agent for Piezoelectric Ceramics

Journal: Architecture Engineering and Science DOI: 10.32629/aes.v3i1.715

Fanghui Yang, Shifeng Huang, Xiaofang Zhang, Chi Zhang

Jinan University, Jinan 250024, Shandong, China

Abstract

The purpose of this paper is to give solutions to the problem that the bonding layer is prone to crack when high power is made as spherical transducers are utilized in broadband applications. In this paper, the technology of low temperature sintering is applied to the integrated preparation of piezoelectric ceramic spheres. After exploration on the suitable low temperature sintering agent, the interface sintering agent system similar to the composition of ceramic spheres is constructed, so that the ceramic spheres become an organic integrity at large. In this study, ceramic powder and three kinds of glass powder with low melting point were used as raw materials to study the influence of ceramic phase composition change on the morphology, electrical and mechanical properties of ceramic matrix at different temperatures. The results indicate that the electrical and mechanical properties of piezoelectric ceramics with bonding layer are improved by the preparation of low temperature sintering agent, and the interface morphology proves with good performance. Compared with the epoxy bonded sample, the piezoelectric coefficient, dielectric constant and three-point bending strength of the optimal composition are increased by 46.13%, 45.75% and 8.37% respectively. The spectrogram of the spherical piezoceramic sample prepared by sintering technology through the admittance/impedance test in air shows that the curve of the sintered PZT piezoceramic spherical shell is smoother than that of the piezoceramic spherical shell bonded by epoxy resin. The resonance peak is more simple, the radial vibration energy is more concentrated, and the electromechanical coupling performance is better, which is beneficial to improve the use power of the spherical transducer. This research will provide conditions for the realization of wide-band and high-power spherical transducer.

Keywords

spherical piezoelectric ceramics, high power, low temperature sintering agent, electrical properties, mechanical properties

Funding

National Natural Science Foundation of China (No. U1806221, U2006218, 51632003), Shandong Provincial Natural Science Foundation (Grant No. ZR2020KA003), Taishan Scholars Program and case-by-case project for Top Outstanding Talents of Jinan

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