Abstract
Thick films of ferroelectric bismuth titanate (Bi4Ti3O12) have been fabricated by spray-on deposition in conjunction with microwave sintering for use as high-temperature ultrasonic transducers. The elastic modulus, density, permittivity, and conductivity of the films were characterized. Electro-mechanical properties of the films were estimated with a commercial d33 meter which gave 16 pC/N. This value is higher than typically reported for bulk bismuth titanate; however, these films withstand higher field strengths during poling which is correlated with higher d33 values. Films were capable of operating at 650 °C for roughly 5 min before depoling and can operate at 600 °C for at least 7 days.
Original language | English (US) |
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Article number | 7330039 |
Pages (from-to) | 139-146 |
Number of pages | 8 |
Journal | IEEE transactions on ultrasonics, ferroelectrics, and frequency control |
Volume | 63 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2016 |
All Science Journal Classification (ASJC) codes
- Instrumentation
- Acoustics and Ultrasonics
- Electrical and Electronic Engineering