Title :
Phase transition in Pb0.88Ln0.08Ti0.98Mn0.02O3 (Ln=La, Sm, Eu) piezoelectric transducers, using radiation and emissivity [biomedical US transducers application]
Author :
Suaste, E. ; Castillo, V. ; Gonzalez, R.
Author_Institution :
Departamento de Ingenieria Electrica, CINVESTAV-IPN, Mexico City, Mexico
Abstract :
We report a new method to determine the phase transition in piezoelectric ceramic by means of the radiation that they emit when it is subjected to different temperatures. The experiment is performed in piezoelectric ceramic based on PbTiO3 modified by the partial substitution of rare earths for Pb in the Pb0.88(Ln)0.08Ti0.98Mn0.02O3 system (Ln = La, Sm, Eu). Also starting from the measurement of the emitted radiation, the value of the emissivity is calculated for each type of piezoelectric ceramic.
Keywords :
biomedical transducers; biomedical ultrasonics; ferroelectric devices; lead compounds; piezoelectric transducers; solid-state phase transformations; ultrasonic transducers; Curie point; Pb0.88Ln0.08Ti0.98Mn0.02O3 (Ln=La, Sm, Eu) piezoelectric transducers; PbEuTiMnO3; PbLaTiMnO3; PbSmTiMnO3; bioengineering; black body; emitted radiation; gray body; medical US transducers; partial substitution; phase transition; piezoelectric ceramic; rare earths; ultrasonic transducers; Ceramics; Dielectric measurements; Ferroelectric materials; Frequency conversion; Phase measurement; Piezoelectric transducers; Samarium; Temperature measurement; Temperature sensors; Ultrasonic transducers;
Conference_Titel :
Engineering in Medicine and Biology, 2002. 24th Annual Conference and the Annual Fall Meeting of the Biomedical Engineering Society EMBS/BMES Conference, 2002. Proceedings of the Second Joint
Print_ISBN :
0-7803-7612-9
DOI :
10.1109/IEMBS.2002.1106647
