Abstract
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.
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