Fabrication of High Acoustic-Electric Efficient Piezoelectric Ceramic Bimorph Element and Pickup in Middle Ear of Cat

doi:10.3724/SP.J.1077.2010.00691

Journal of Inorganic Materials ›› 2010, Vol. 25 ›› Issue (7): 691-694.DOI: 10.3724/SP.J.1077.2010.00691

• Research Paper • Previous Articles Next Articles

Fabrication of High Acoustic-Electric Efficient Piezoelectric Ceramic Bimorph Element and Pickup in Middle Ear of Cat

KANG Hou-Yong¹, WU Yong-Zhen¹, CHI Fang-Lu¹, GUO Shao-Bo², GAO Na¹, PAN Tie-Zheng³

(1. Shanghai Eye & ENT hospital, Fudan Univeristy, Shanghai 200031, China; 2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 3. Pante Electronic ceramic R&D center co. Ltd., Kunsan 211138, China)

Received:2009-11-11 Revised:2009-12-22 Published:2010-07-20 Online:2010-06-10

Abstract

Abstract:

A novel PZT piezoelectric ceramics with high d₃₁ (-480pC/N) and T_c (280℃) was developed to shape a long strip of piezoelectric ceramic bimorph element (PCBE), with 0.3 mm in thickness, 1.0 mm in width and three lengths (3.5, 4.0, 4.5 mm), which were assembled to the cantilever structure anchoring a Preamplifier, and were implanted totally into tympanic cavity of cat ear to analyze their ability of picking up acoustic signal. This study explores that the PCBEs have high efficient acoustic-electric performance. They can pick up 20-20000Hz acoustic signal with an approximate flat frequency curve when they are implanted the tympanic cavity of cat. The maximal output of -13.16 dB Volt p-p value (@1.5kHz, 0dB input) is picked up by the 4.5mm PCBE. This validates that PCBE might be totally implanted into tympanic cavity of cat ear as a piezoelectric microphone.

Key words: piezoelectric ceramic bimorph elements, transverse piezoelectric coefficient, acoustic-electric performance, middle ear

CLC Number:

TM282

KANG Hou-Yong, WU Yong-Zhen, CHI Fang-Lu, GUO Shao-Bo, GAO Na, PAN Tie-Zheng. Fabrication of High Acoustic-Electric Efficient Piezoelectric Ceramic Bimorph Element and Pickup in Middle Ear of Cat[J]. Journal of Inorganic Materials, 2010, 25(7): 691-694.

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Fabrication of High Acoustic-Electric Efficient Piezoelectric Ceramic Bimorph Element and Pickup in Middle Ear of Cat

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