COMPRESSIVE TYPE ACCELEROMETER MADE BY LEADFREE BI0.5NA0.5TIO3- BASED PIEZOCERAMICS
Compressive type accelerometers are widely used in various vibration measurements. Lead-free piezoelectric ceramics as sensitive element have been preferred from the viewpoint of environmental impact. In this paper, 0.30 wt％ MnO-added Bi0.485Na0.425K0.06Ba0.03TiO3 (BNKB) piezoelectric ceramics were used as the sensitive element in a compressive type accelerometer. Based on the finite element analysis, the influences of the mass of the preloading element and the thickness of the sensitive piezo-rings on charge sensitivity and operation frequency were analyzed, thus optimizing the structure and parameters of the accelerator. The sensitivity (calibrated by a back-to-back method) of the accelerometer as-fabricated was measured to be 3.9 pC/m-s-2 within 100 Hz—5 kHz within the 2dB tolerance.
Accelerometer Lead-free piezoelectrics Sodium bismuth titanate Charge Sensitivity.
Kui-yongYANG Man-kang ZHU Yu-dongHOU HuiYAN
College of Materials Sci. & Eng., Beijing University of Technology, Beijing 100124, China
国际会议
深圳
英文
429-432
2011-12-09（万方平台首次上网日期，不代表论文的发表时间）