INFLUENCE OF THE CALCINATION TEMPERATURE ON THE STRUCTURE AND OPTICAL PROPERTIES OF K0.5Na0.5NbO3 NANOPOWDERS SYNTHESIZED BY SOL-GEL TECHNIQUE
Keywords:
PbZrO3-PbTiO3 (PZT), X ray diffraction (XRD), Ultra-Violet visible spectroscopy (UV-vis spectroscopy), Piezoelectric, Ferroelectric, Transverse optical mode (TO), Longitudinal optical mode (LO).
Abstract
K0,5Na0,5NbO3 (KNN) nano powder materials were fabricated by sol-gel method. The effect of the sintering temperatures on the structure and optical properties was also studied. The results of X ray diffraction indicated that KNN samples have the perovskite structure with an orthorhombic phase. Raman spectroscopy exhibited that there was a change in the scattering vibration modes at the different calcination temperatures. By increasing these temperatures, the optical band gap of the samples calculated in UV-vis absorption spectroscopy declined. Our work showed that KNN samples synthesized by sol-gel method has lowered the sintering temperature compared with some reported fabrication techniques.
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đánh giá
Published
2021-04-27
Section
Khoa học - Kỹ thuật