Pyroelectric and dielectric properties of ferroelectric ceramics for microwave tunable devices and infrared detector applications
Proceedings of 2012 21st IEEE Int. Symp. on Applications of Ferroelectrics held jointly with 11th IEEE European Conference on the Applications of Polar Dielectrics and IEEE PFM, ISAF/ECAPD/PFM 2012
- Fecha: 31 October 2012
- ISBN: 9781467326681
- Source Type: Conference Proceeding
- DOI: 10.1109/ISAF.2012.6297835
- Document Type: Conference Paper
This paper presents new results of low frequency pyroelectric behavior and dielectric constant tunability at microwave frequencies of novel lead-free ferro-piezoelectric ceramics with composition (Bi 0.5Na 0.5) 0.96Ba 0.04TiO 3, We show that these ceramics perform well as pyroelectric infrared detectors, with a sensitivity comparable to traditional lead-containing ceramics. For microwave tunable applications, the material presents a promising tunability of the dielectric constant in the range from 100 MHz to 3 GHz when moderate DC electric fields are applied. These results encourage the research on this material for new applications in the fields of microwave devices and infrared optoelectronics. © 2012 IEEE.