Ji Jae-Hoon, Jo GaeHun, Kim Byung-Joon, Park Min Young, Koh Jung-Hyuk
School of Electrical and Electronics Engineering, Chung-Ang University, Seoul, 06974, Korea.
J Nanosci Nanotechnol. 2018 Sep 1;18(9):5991-5995. doi: 10.1166/jnn.2018.15590.
In this research, the pyroelectric and piezoelectric properties of (1 - x)Na0.5K0.5NbO3-xBiScO3 ceramics were investigated and analyzed. (Na, K)NbO3 based (1 - x)Na0.5K0.5NbO3-xBiScO3 ceramics were prepared by a conventional mixed oxide method. As the substituent, BiScO3 material enhanced the sintering mechanism of NKN ceramic, which improved the density, pyroelectric and piezoelectric properties, without any structural distortion. In this study, the structural dependent improved piezoelectric properties of (1 - x)Na0.5K0.5NbO3-xBiScO3 ceramics were investigated with various sintering temperatures. Also, the pyroelectric properties of (1 - x)Na0.5K0.5NbO3-xBiScO3 ceramics were observed up to 200 °C for the devices applications. The crystalline structures of the (1-x)Na0.5K0.5NbO3-x BiScO3 ceramics were measured by X-ray diffraction (XRD). The microstructure was examined by field emission scanning electron microscopy (FE-SEM). In addition, piezo-electric charge coefficient d33 and pyroelectric coefficient will be discussed.
在本研究中，对(1 - x)Na0.5K0.5NbO3-xBiScO3陶瓷的热释电和压电性能进行了研究与分析。采用传统的混合氧化物法制备了基于(Na, K)NbO3的(1 - x)Na0.5K0.5NbO3-xBiScO3陶瓷。作为取代物，BiScO3材料增强了NKN陶瓷的烧结机制，提高了密度、热释电和压电性能，且无任何结构畸变。在本研究中，研究了不同烧结温度下(1 - x)Na0.5K0.5NbO3-xBiScO3陶瓷与结构相关的改进压电性能。此外，对于器件应用，观察了(1 - x)Na0.5K0.5NbO3-xBiScO3陶瓷在高达200 °C时的热释电性能。通过X射线衍射(XRD)测量了(1-x)Na0.5K0.5NbO3-x BiScO3陶瓷的晶体结构。用场发射扫描电子显微镜(FE-SEM)检查了微观结构。此外，还将讨论压电电荷系数d33和热释电系数。
