K0.5Na0.5NbO3 piezoelectric ceramics and its composites fabricated from hydrothermal powders
- DOI
- 10.2991/icsma-16.2016.58How to use a DOI?
- Keywords
- Hydrothermal method; Sodium potassium niobate; lead-free piezoelectric ceramic;Composites.
- Abstract
NaNbO3 and KNbO3 powders were prepared respectively by the hydrothermal synthesis method. The obtained powders were mixed with the molar ratio of 1:1 and dry-pressed, the (K0.5Na0.5)NbO3 (KNN) lead-free piezoelectric ceramics were obtained by sintering at 1060-1100 øC at normal atmosphere. The effect of sintering temperature on phase, microstructures, bulk density and electrical properties of KNN ceramics were investigated. The XRD patterns showed that the single solid solution of (Na, K) NbO3 ceramics was acquired. The SEM micrographs exhibited that increasing sintering temperature appropriately would improve grain growth and decrease porosity. K/Na, shrinkage, density, piezoelectric constant d33 and dielectric constant increased with the increased sintering temperature. When the sintering temperature was 1100 øC, the d33 reached a maximum (110.8 PC/n). Meanwhile, through freeze casting and infiltrating with a polymeric lubricant phase, a layered KNN-epoxy composite was produced using the hydrothermally synthesized NaNbO3 and KNbO3 powders as raw powders. Its microstructures and properties were analyzed.
- Copyright
- © 2016, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Chunyu Jiang AU - Xiaoxiao Tian AU - Guodong Shi PY - 2016/12 DA - 2016/12 TI - K0.5Na0.5NbO3 piezoelectric ceramics and its composites fabricated from hydrothermal powders BT - Proceedings of the 2016 4th International Conference on Sensors, Mechatronics and Automation (ICSMA 2016) PB - Atlantis Press SP - 321 EP - 327 SN - 1951-6851 UR - https://doi.org/10.2991/icsma-16.2016.58 DO - 10.2991/icsma-16.2016.58 ID - Jiang2016/12 ER -