Title :
Electromechanical properties of BST for acoustic imaging arrays
Author_Institution :
Texas Instrum. Inc., Attleboro, MA
Abstract :
BST capacitors possess excellent dielectric and electromechanical properties near FE-PE phase transition under dc bias field. In this work we will present the field and temperature dependencies of the electromechanical properties of (Ba,Sr)TiO3. Experimental observations will be compared to predictions from the phenomenological theory of ferroelectric phase transitions. Previously developed densely populated two-dimensional BST arrays will be described for potential applications in real time hand-held acoustic camera for underwater divers, medical imaging, and acoustic microscopy
Keywords :
acoustic arrays; acoustic imaging; barium compounds; electromechanical effects; ferroelectric capacitors; ferroelectric transitions; strontium compounds; (BaSr)TiO3; BST capacitor; DC bias field; acoustic microscopy; dielectric properties; electromechanical properties; ferroelectric phase transition; medical imaging; phenomenological theory; real-time hand-held acoustic camera; temperature dependence; two-dimensional acoustic imaging array; underwater diver; Acoustic applications; Acoustic arrays; Acoustic imaging; Binary search trees; Biomedical acoustics; Capacitors; Dielectrics; Ferroelectric materials; Temperature dependence; Underwater acoustics;
Conference_Titel :
Applications of Ferroelectrics, 2000. ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-5940-2
DOI :
10.1109/ISAF.2000.941604
