Aging behavior and electrical properties of low-temperature sintered (Ba, Ca)(Ti, Zr)O-3-Ba(Cu, W)O-3 ceramics and plate loudspeaker

作者：Chao, Xiaolian^*; Wang, Juanjuan; Pu, Jun; Zhang, Shujun; Yang, Zupei^*

来源：Sensors and Actuators A: Physical , 2016, 237: 9-19.

DOI：10.1016/j.sna.2015.11.015

• Lead-free ceramics
• Piezoelectric properties
• Loudspeaker
• Temperature stability

Lead-free (1 - x)wt.% (Ba0.85Ca0.15)(Zr0.10Ti0.90)O-3 - x wt.% (Ba(Cu0.5W0.5)O-3 (BCZT - x wt.% BCW) piezo-electric ceramics were prepared by solid-state reaction. The phase structure of the ceramics showed that the orthorhombic-tetragonal phase boundary was identified in the range of 1.2 <= x <= 1.6 wt.%. The dense microstructure and optimal electrical properties of the ceramics were obtained at x = 1.2 wt.%. Fatigue behavior of the ceramics was also investigated as a function of temperature and keeping time, where the BCZT - 1.2 wt.% BCW materials were found to possess improved fatigue characteristic. In addition, the sound pressure level (SPL) of 16.0 mm length x 16.0 mm width x 0.1 mm piezoelectric loudspeakers using lead-free BCZT ceramics with 1.2 wt.% BCW content at drive voltage of 10-20 V was more than 80 dB at frequency of 2.2-20.0 kHz. These results indicated that the 98.8 wt.% BCZT - 1.2 wt.% BCW ceramics was potential for piezoelectric loudspeaker applications.

• 出版日期2016-1-1
• 单位陕西师范大学; 西安理工大学