Artículos de revistas
Complex Elastic Coefficient And Mechanical Losses For Piezoelectric Resonators Under Transversal And Thickness Modes
Registro en:
Ferrolectrics. Taylor & Francis Ltd, v. 504, p. 104 - 115, 2016.
0015-0193
1563-5112
WOS:000388662900011
10.1080/00150193.2016.1239999
Autor
Arnold
Francisco Jose; Goncalves
Marcos Sergio; Massaro Junior
Flavio Rubens; Martins
Paulo Sergio
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The performance of piezoelectric transducers depends upon a set of physical parameters. Among them, losses are one of the most important. Mechanical losses in piezoelectric devices are studied using complex numbers in the elastic coefficients of the models. Usually, numerical methods are employed to obtain the loss parameters through the minimization of an error function. We insert mechanical losses dependent on frequency in Mason's model to evaluate how this dependency affects the electrical impedance curve. The results show that a better curve fitting is achieved when the mechanical loss is a first order function of frequency. 504 1 104 115 Sao Paulo Research Foundation (FAPESP) [2012/07639-4, 2011/12792-3] Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)