Study on improvement of the piezoelectric properties of acoustic emission sensor to be used for superconducting application systems

K. J. Kim, J. H. Kim, J. B. Song, J. H. Paik, J. Y. Jang, T. K. Ko, H. G. Lee

Research output: Contribution to journalArticle

Abstract

Acoustic emission (AE) signal from an HTS tape has a low signal to noise ratio, due to th e large amount of noise caused by the boiling of the liquid cryogen or mechanical vibration from the cryo -cooler. In an attempt to improve the sensitivity of the AE sensor, Pb(Zr0.54Ti0.46)O3 + 0.2 wt% Cr2O3 + 1.0 wt.% ND2O5 ceramics sintered at 1200°C was sy nthesized. In addition, the resonance (fr) and anti-res onance frequencies (fa) were measured using the spe cimens with various thicknesses (1.0, 1.5, 2.0, 2.5 an d 3.0 mm). According to the test results, large AE s ignals with high frequencies were obtained from the AE sensor fabricated using a piezoelectric disc with a thinner thickness.

Original languageEnglish
Pages (from-to)44-48
Number of pages5
JournalJournal of the Korea Institute of Applied Superconductivity and Cryogenics
Volume12
Issue number3
Publication statusPublished - 2010 Sep 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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