Title :
CaBi4Ti4O15/PZT sol-gel composite for high temperature ultrasonic transducers
Author :
Kobayashi, Masato ; Inoue, Takeru ; Nagata, Hidefumi ; Takenaka, Takashi
Author_Institution :
Grad. Sch. of Sci. & Technol., Kumamoto Univ., Kumamoto, Japan
Abstract :
New sol-gel composite made by CaBi4Ti4O15 (CBT) piezoelectric powder and lead zirconate titanate (PZT) sol-gel was investigated for high temperature ultrasonic transducer applications. CBT was chosen because of relatively high Curie temperature, ~790°C. PZT sol-gel was chosen because of high dielectric constant. In order to investigate high temperature performance of CBT/PZT, CBT/PZT films were fabricated onto the metal plate substrates and then the reflected echoes from the substrate were monitored from room temperature up to 550°C. The signal strength was compared with bismuth titanate (BIT)/PZT and PZT/PZT. As a result, the echoes were confirmed from CBT/PZT and BIT/PZT samples at 550°C.
Keywords :
bismuth compounds; calcium compounds; composite materials; ferroelectric Curie temperature; lead compounds; permittivity; piezoelectric materials; sol-gel processing; ultrasonic transducers; Bi4Ti3O12-PZT; CaBi4Ti4O15-PZT; PZT; bismuth titanate; dielectric constant; high Curie temperature; high temperature ultrasonic transducer applications; lead zirconate titanate; metal plate substrates; piezoelectric powder; signal strength; sol-gel composite; temperature 20 degC to 550 degC; temperature 293 K to 298 K; Optical films; Substrates; High temperature; safety assesment; sol-gel composite; ultrasonic transducer;
Conference_Titel :
Applications of Ferroelectric and Workshop on the Piezoresponse Force Microscopy (ISAF/PFM), 2013 IEEE International Symposium on the
Conference_Location :
Prague
DOI :
10.1109/ISAF.2013.6748736
