| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Coatings to Protect Materials from Extreme Environments
|
| Presentation Title |
Aerosol Deposition and Characterization of Sodium Niobate |
| Author(s) |
Eric A. Patterson, Scooter D Johnson, Edward Gorzkowski |
| On-Site Speaker (Planned) |
Eric A. Patterson |
| Abstract Scope |
Aerosol deposition was used to produce thick-films with layer thicknesses between 10 to 50 microns. The bonding and densification of the film and film/substrate interface facilitated by high pressure, impact and fracture of the particles, and some form of physical-chemical bonding. The films have microstructures characterized by XRD to have nano-grained crystallites and have been shown to have high residual stresses. This inhibits the formation of ferroelectric domains even in the prototypical ferroelectric system of barium titanate, which correlates to the well-known grain size effect in bulk ceramics. Due to these high residual stresses, materials systems that exhibit either antiferroelectric properties in the bulk (such as NaNbO3) or stress-stabilized ferroelectric materials (such as HfO2), are natural alternatives to be studied via this technique. Deposition was performed onto metal substrates to facilitate the characterization of the electrical properties of the films; including permittivity as a function of temperature. |