| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Functional and Structural Thin Films and Coatings
|
| Presentation Title |
Steep Temperature-dependent Permittivity in BCZT Thin Films for Capacitive Thermoelectric Converter Application |
| Author(s) |
Chukwudike Chukwunenye Ukeje |
| On-Site Speaker (Planned) |
Chukwudike Chukwunenye Ukeje |
| Abstract Scope |
Capacitive thermoelectric conversion devices utilizing non-linear capacitance variation with temperature provide a promising opportunity to convert low-grade waste heat into electricity. In this research, Pulsed Laser Deposition has been optimized to deposit thin films of Barium Calcium Zirconium Titanite (BCZT) on a (100)-oriented SrTiO3 (STO) substrate to access their suitability as a thin dielectric layer for the capacitive thermoelectric application. Based on X-ray diffraction results, the most promising of these films in terms of orientational growth in relation to the substrate was chosen to fabricate an in-plane electrode-type capacitor. XPS analysis showed sufficient transfer of stichometry during thin film deposition. Leakage current measurements showed relatively low leakage current behaviour. Capacitance-temperature measurements revealed that the film exhibited adequate capacitance-temperature dependence with a Curie temperature of about 368 K. From these results, the BCZT thin film was concluded to be a promising dielectric material for the capacitive thermoelectric converter application. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Other, Other |