An ultrasonic therapeutic transducers using lead-free Na 0.5K0.5NbO3-CuNb2O6 ceramics

Ming Ru Yang, Sheng Yuan Chu, Cheng Che Tsai

研究成果: Article同行評審

18 引文 斯高帕斯(Scopus)

摘要

In this work, we reports on the CuNb2O6 (CN) modified lead-free Na0.5K0.5NbO3 (NKN) based piezoelectric ceramics were synthesized by solid-state reaction methods and sintered at 1075 °C for 3 h. A secondary phase of K4CuNb 8O23 was found in the XRD pattern of NKN-based ceramics as the CN dopants is 1 mol%. Microstructural analyses of un-doped and CN-doped ceramics were performed in a scanning electron microscope. The influence of CN content on the microstructure, electrical properties, temperature stability, and mechanical properties of the synthesized ceramics was investigated. The results show that the synthesized ceramics with CN-doped not only had improved density but also exhibited superior piezoelectric characteristics, temperature stability of resonance frequency (TCF), and a better elastic stiffness coefficient than those of pure NKN piezoelectric ceramics. The bulk density (4.47 g/cm 3), kp (40%), kt (45%), Qm (1642), C33D (19.64 × 1010 N/m2), TCF (-0.011%/°C) and TCC (0.135%/°C) values for NKN-01CN ceramics obtained from experiments show excellent 'hard' piezoelectric properties. Furthermore, a lead-free NKN-01CN ultrasonic therapeutic transducer was successfully driven by a self-tuning circuit.

原文English
頁(從 - 到)433-438
頁數6
期刊Journal of Alloys and Compounds
507
發行號2
DOIs
出版狀態Published - 2010 10月 8

All Science Journal Classification (ASJC) codes

  • 材料力學
  • 機械工業
  • 金屬和合金
  • 材料化學

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