Pyroelectric and Piezoelectric Properties of (1-x)Na0.5K0.5NbO3-xBiScO(3) Lead-Free Ceramics

초록

In this research, the pyroelectric and piezoelectric properties of (1 - x)Na0.5K0.5NbO3-xBiScO(3) ceramics were investigated and analyzed. (Na, K) NbO3 based (1 - x)Na0.5K0.5NbO3-xBiScO(3) ceramics were prepared by a conventional mixed oxide method. As the substituent, BiScO3 material enhanced the sinteringmechanism 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-xBiScO(3) ceramics were investigated with various sintering temperatures. Also, the pyroelectric properties of (1 - x)Na0.5K0.5NbO3-xBiScO(3) ceramics were observed up to 200 degrees C for the devices applications. The crystalline structures of the (1 - x)Na0.5K0.5NbO3-xBiScO(3)ceramics were measured by X-ray diffraction (XRD). The microstructure was examined by field emission scanning electron microscopy (FE-SEM). In addition, piezoelectric charge coefficient d(33) and pyroelectric coefficient will be discussed.

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