Preparation and characterization of piezoelectric ceramics with high electromechanical coupling coefficient

Abstract

Piezoelectric ceramics 0.02Pb(Sb_1/2Nb_1/2)O₃-0.98Pb_(1−x)Ba_xZr_0.52Ti_0.48O₃ (PSN-PBZT) were fabricated by the traditional solid-state reaction method. The X-ray diffraction was used to analyze the lattice structure of prepared ceramics and a pure tetragonal perovskite structure was identified in all the samples. The grain size of the samples observed from SEM decreases with increasing Ba²⁺ contents. The ceramic of x = 0.04 shows optimal performance with a large piezoelectric constant d₃₃ (∼502 pC/N) and a high electromechanical coupling efficient k_p (∼0.85). Furthermore, the piezoelectric properties of this sample exhibit a good temperature stability and the fluctuation of k_p and d₃₃ is only about 5.0% and 8.2%, respectively, over a broad temperature range from 0 °C to 100 °C. These properties make this ceramic a good candidate material for the practical applications in a wide temperature range.

Keywords:

• High electromechanical coupling coefficient
• piezoelectric ceramic
• PSN-PZT
• temperature stability

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Key R&D Program of China [grant Nos. 2016YFB0402701, 2016YFA0201103], the National Basic Research Program of China [grant No. 2015CB654605], National Nature Science Foundation of China [grant Nos. 51672293, 11475240], the Instrument Developing Project of Chinese Academy of Sciences [grant No. ZDKYYQ20180004], and the Chinese Academy of Sciences President’s International Fellowship Initiative [grant/award No. 2017VMA0018 and 2011T2G03].