원문정보
Study on Improvement of the Piezoelectric Properties of Acoustic Emission Sensor to be Used for Superconducting Application Systems
초록
영어
Acoustic emission (AE) signal from an HTS tape has a low signal to noise ratio, due to the 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.% Nb2O5 ceramics sintered at 1200°C was synthesized. In addition, the resonance (fr) and anti-resonance frequencies (fa) were measured using the specimens with various thicknesses (1.0, 1.5, 2.0, 2.5 and 3.0 mm). According to the test results, large AE signals with high frequencies were obtained from the AE sensor fabricated using a piezoelectric disc with a thinner thickness.
목차
1. 서론
2. 압전소자의 제작 및 특성 분석
2.1. 압전소자의 제조
2.2. AE 센서의 제작 및 특성평가
2.3. 반복 퀜치 실험
3. 결과 및 토의
3.1. 압전체의 두께에 따른 센서 특성
3.2. 반복퀜치 실험 결과
4. 결론
참고문헌