Piezoelectric PMN-PT fibre hydrophone for ultrasonic transducer calibration |
| |
| Authors: | ST Lau KH Lam HLW Chan CL Choy HS Luo QR Yin ZW Yin |
| |
| Institution: | (1) Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hunghom, Kowloon, Hong Kong, China;(2) Shanghai Institute of Ceramics, The Chinese Academy of Sciences, Shanghai, China |
| |
| Abstract: | A newly developed ceramic fibre hydrophone with an active element as small as 0.25 mm in diameter is described in this work. Lead magnesium niobate-lead titanate (PMN-PT) ceramic fibre with a nominal composition of 0.65Pb(Mg1/3Nb2/3)O3-0.35PbTiO3 was fabricated by an extrusion method. PMN-PT single crystals were ground to a powder form and then mixed with poly(acrylic) acid to form a homogenous slurry. The fibre was extruded by pressing the slurry through a spinneret and then sintering at 1250 °C for crystallization. The electrical characteristics of the PMN-PT fibre were evaluated by measuring the relative permittivity and the impedance spectrum. A piezoelectric PMN-PT fibre hydrophone was fabricated and its sensitivity, angular response, and spatial resolution were evaluated. The fibre hydrophone provides good spatial resolution, angular response and receiving sensitivity. PACS 43.58.+z; 77.84.Dy |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
