Title :
Compressive type accelerometer made by leadfree Bi0.5Na0.5TiO3- based piezoceramics
Author :
Yang, Kui-yong ; Zhu, Man-Kang ; Hou, Yu-Dong ; Yan, Hui
Author_Institution :
Coll. of Mater. Sci. & Eng., Beijing Univ. of Technol., Beijing, China
Abstract :
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.
Keywords :
accelerometers; barium compounds; bismuth compounds; finite element analysis; manganese compounds; piezoceramics; piezoelectric transducers; potassium compounds; sodium compounds; vibration measurement; MnO-Bi0.485Na0.425K0.06Ba0.03TiO3; charge sensitivity; compressive type accelerometer; environmental impact; finite element analysis; frequency 100 Hz to 5 kHz; gain 2 dB; lead-free piezoelectric ceramic; sensitive piezoring thickness; vibration measurement; Accelerometers; Ceramics; Finite element methods; Impedance; Lead; Resonant frequency; Sensitivity; Accelerometer; Charge Sensitivity; Lead-free piezoelectrics; Sodium bismuth titanate;
Conference_Titel :
Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA), 2011 Symposium on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4673-1075-8
DOI :
10.1109/SPAWDA.2011.6167280
