S. Kongsriprapan

Investigation some Properties of Bismuth Borate Glasses Containing Al2O3

The glass samples in bismuth borate glass matrix containing Al2O3, with the composition of xAl2O3 : 30Bi2O3 : (70-x)B2O3 where x are Al2O3 concentration varying from 0.0, 2.0, 4.0, 6.0, 8.0 and 10.0 mol%, have been prepared. The obtained glasses were investigated some physical and optical properties. The results showed that the densities increased with increasing of Al2O3 concentration, whereas the molar volumes decreased. For the absorption spectra, no peak in the UV to NIR regions has been observed. Moreover the energy band gap and the refractive index for all samples have been calculated.

Effect of Annealing Temperature on Electrochromic Properties of Tantalum Oxide Thin Films Deposited by DC Reactive Magnetron

The effect of annealing temperature on the electrochromic properties of the tantalum oxide (TaO) thin films deposited on silicon wafer (100) and indium tin oxide (ITO) substrates by dc reactive magnetron sputtering was investigated. The films were annealed at 300, 400 and 500 °C in vacuum for 2 hour. The crystalline structure, morphology, optical properties and electrochromic properties of as-deposited and annealed film were deduced by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), spectroscopic ellipsometry and ultraviolet–visible (UV–vis) spectrophotometery, respectively. The reflective index of TaO thin films increased with increasing annealing temperature. The result indicated that the annealed TaO thin film showed better performance than the as-deposited film.

The Crystalline Monitoring of Oxide Compound: The Case Study of Influence from Heat Treatment

In present study, the structural and thermal characterizations of the natural material were investigated, the relationship between the crystal structure and thermal treatment were studied. The relationship between temperature and features of the crystal structure were determined qualitative by three conventional analysis techniques, X-Ray Diffraction (XRD), Energy Dispersive X-Ray Fluorescence (EDXRF) and Fourier Transform Infrared Spectroscopy (FT-IR). The results show that the Babylonia areolata have a crystalline of calcium carbonate in phase aragonite, and the rice husks have amorphous structure. Another that, both sample annealed under air atmosphere, the effect of temperature induced both materials have phase transformation. Both sample transformed into oxide compound at temperature about 900C. In addition, the composition of both mineral and the level of the metals element were investigated by EDXRF. Functional group and chemical environment of silicon ions and calcium ions were identified by FT-IR, respectively.