Research on Biomedical Engineering
https://rbejournal.org/article/5889fbb95d01231a018b4779
Research on Biomedical Engineering
Original Article

OBTENÇAO AUTOMATICA DE PARAMETROS PIEZOELÉTRICOS DE CERAMICAS E POLIMEROS: O CASO DE CERAMICAS NACIONAIS PARA USO EM ULTRA-SONOGRAFIA.

AUTOMATIC ACHIEVEMENT OF PIEZOELETRIC PARAMETERS FOR CERAMICS AND POLYMERS: THE CASE OF NATIONAL CERAMICS FOR USE IN ULTRASONOGRAPHY.

Medina, L.A.H.; Machado, João Carlos

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Resumo

É apresentada uma metodologia baseada em instrumentação controlada por microcomputador para levantar de forma automática a impedância elétrica, o fator de acoplamento eletromecânico, a capacitância e o fator de qualidade mecânico de Materiais piezoelétricos usados eM transdutores ultra-sônicos de eqUipaMentos Médicos. UM conjunto de 10

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Abstract

It is presented a Methodology based on Microcomputer controlled instrumentation to determine the electrical impedance, the electromechanical coupling coeficient, the capacitance and the mechanical quality factor of piezoelectric Materials used to construct ultrasonic transducer for medical equipments. A set of 10 (ten) national ceramics is tested and the results indicate that the electromechanical coupling factor is lower than what is usually found in the literature and the Mechanical quality fator has about 40% dispersion around its Mean value. Nevertheless, if an adequate quality control is used to chose the ceramics then they can be used in the construction of ultrasonic medical equipments.
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