| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Manufacturing and Processing of Advanced Ceramic Materials
|
| Presentation Title |
Cold Sintering of Potassium Sodium Niobate, K0.5Na0.5NbO3 |
| Author(s) |
Koki Nakagawa, Masato Iwasaki, Clive A. Randall |
| On-Site Speaker (Planned) |
Koki Nakagawa |
| Abstract Scope |
Cold sintering process (CSP) is a new method which densifies the oxide ceramics through the transient liquid phase sintering process at sintering temperature below 300℃. Recently, CSP was applied to K0.5Nb0.5O3 (KNN), however the d33 of KNN sintered by CSP was about 20% of that of KNN sintered by the conventional method. The results of electron microscopy observations after CSP of KNN showed that KNN has limited grain growth and many line defects were observed in the bulk. Therefore, it is suggested that the particle size and defect density of the initial KNN powder should be optimized before CSP.
In this study, KNN initial powders with different average particle sizes were prepared by varying the calcination temperature and CSP was applied to these powders. This study shows that the particle size of the initial KNN powders influence the densification and piezoelectric properties after CSP. |