Investigation into New Type Piezomagnetic Materials and Acoustical Transducers Exhibiting Piezoelectricity and Piezomagnetic Effect

摘要

The design, preparation, etc of newly multipurpose ferrites (i.e., a magnetoelectric ceramic materials) Ba6-xR2x(Nb1-xFe2+x)O3, etc, which it exhibiting the piezoelectricity and the piezomagnetic effect (i.e., the ferrite is a multifunctional electroceramic) have been studied. The functional integrated devices including, with the magnetoelectric ceramic materials be made of a had piezoelectric vibration (electro-strctive type thickness extension vibration) and piezomagnetic vibration (magnetostriction type longitudinal extension vibration) both in the same vibrator (i.e., a functional integrated device of having two functions) which that is a composite acoustic transducer, and their applications have been investigated in acoustics etc, as may be noted.