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Use of a Reflectance Spectroscopy Accessory for Optical Characterization of ZnO-Bi2O3-TiO2 Ceramics
Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
Advanced Materials and Nanotechnology Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
* Author to whom correspondence should be addressed.
Received: 11 December 2010 / Accepted: 17 February 2011 / Published: 25 February 2011
Abstract: The optical band-gap energy (Eg) is an important feature of semiconductors which determines their applications in optoelectronics. Therefore, it is necessary to investigate the electronic states of ceramic ZnO and the effect of doped impurities under different processing conditions. Eg of the ceramic ZnO + xBi2O3 + xTiO2, where x = 0.5 mol%, was determined using a UV-Vis spectrophotometer attached to a Reflectance Spectroscopy Accessory for powdered samples. The samples was prepared using the solid-state route and sintered at temperatures from 1140 to 1260 °C for 45 and 90 minutes. Eg was observed to decrease with an increase of sintering temperature. XRD analysis indicated hexagonal ZnO and few small peaks of intergranular layers of secondary phases. The relative density of the sintered ceramics decreased and the average grain size increased with the increase of sintering temperature.
Keywords: UV-Vis spectrophotometer; Reflectance Spectroscopy Accessory; optical band-gap; ZnO; Bi2O3; TiO2
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MDPI and ACS Style
Ghazali, M.S.M.; Zakaria, A.; Rizwan, Z.; Kamari, H.M.; Hashim, M.; Zaid, M.H.M.; Zamiri, R. Use of a Reflectance Spectroscopy Accessory for Optical Characterization of ZnO-Bi2O3-TiO2 Ceramics. Int. J. Mol. Sci. 2011, 12, 1496-1504.
Ghazali MSM, Zakaria A, Rizwan Z, Kamari HM, Hashim M, Zaid MHM, Zamiri R. Use of a Reflectance Spectroscopy Accessory for Optical Characterization of ZnO-Bi2O3-TiO2 Ceramics. International Journal of Molecular Sciences. 2011; 12(3):1496-1504.
Ghazali, Mohd Sabri Mohd; Zakaria, Azmi; Rizwan, Zahid; Kamari, Halimah Mohamed; Hashim, Mansor; Zaid, Mohd Hafiz Mohd; Zamiri, Reza. 2011. "Use of a Reflectance Spectroscopy Accessory for Optical Characterization of ZnO-Bi2O3-TiO2 Ceramics." Int. J. Mol. Sci. 12, no. 3: 1496-1504.