About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Phase Transformations in Ceramics: Science and Applications
|
| Presentation Title |
Route to Pure Ferroelectric Tungsten Trioxide Phase at Room Temperature |
| Author(s) |
Zanlin Qiu , Mohammad Mahafuzur Rahaman, Boyd Panton , Joerg R. Jinschek, Pelagia-Irene (Perena) Gouma |
| On-Site Speaker (Planned) |
Mohammad Mahafuzur Rahaman |
| Abstract Scope |
Ferroelectric phase of tungsten trioxide (ε-WO3) has grabbed attention for its simple structure as well as solid state coloration and unique gas sensing properties. However, obtaining pure form of this ε-phase, which is unstable at RT, has been a challenge for the scientific community. In this study, Cr- and Ti- doping into WO3 stabilized the ε-phase through solvothermal synthesis, leaving a fraction of γ-phase in the final powder. The ferroelectric ε-phase is further purified to almost 100% via a rapid solidification process involving millisecond laser. The structures were confirmed using XRD, Raman and TEM analysis. The fractions of ε-phase in solvothermal synthesis powders are directly correlated with doping level. The fraction of ε-WO3 can be further improved to almost 100% by introducing kinetic constraints using pulsed laser irradiation through rapid solidification process. The study opens up a viable pathway for the scalable synthesis of ε-WO3 and using additive manufacturing. |