TELLURITE GLASSES THESIS

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Mohan Babu, Suman Shakya, et al. LiNbO3 is an important crystal which has piezoelectric, ferroelectric and electro-optical functions. Mysen, Physics and chemistry of silicate glasses and melts, Eur. All the grown films were polycrystalline with the plane as the preferred orientation and the peak position shifted towards higher diffraction angle with the increase of doping content in the films. Spectrum Study of Crystal Fe:

An uncooled SiC-based electro-optic device is developed for gas sensing applications. Forbidden band of LiNbO3 crystals was decreased as the iron doped. Mn doped ZnO films with different doping concentration were synthesized by sol gel method using the spin coating technique. These films achieve tunable band gap characteristics by means of changing the dopant concentration. Luminescence of erbium doped tellurite glass containing silver nanoparticles Jamaludin, Mohd. Transmission and reflection spectrum of the LiNbO3 samples on the infrared-visible-ultraviolet light have been measured. The optical studies revealed a decrease of transmittance with the increase of Ni-doping content in the films and the evaluated energy band gap was found to be direct that decreased from 3.

Optical Properties of Erbium Doped Tellurite Glasses

Luminescence of erbium doped tellurite glass containing silver nanoparticles. It shows an initial decrease of band gap for small concentrations of Mn, followed by an increase at higher Mn doping concentrations. Consequently, the refractive index of the substrate changes, which, in turn, modifies the reflectivity of the substrate.

The XRD pattern confirms the amorphous nature of all samples.

Forbidden band of LiNbO3 crystals was decreased as the iron doped. Luminescence of erbium doped tellurite glass containing silver nanoparticles Jamaludin, Mohd. Mysen, Physics and chemistry of silicate glasses and melts, Eur. The Eg of the three samples were obtained as 3.

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The dependence of the refractive indices, absorption edge and optical damage in congruent HfO2-doped LiNbO3 crystal are reported.

Transmission tllurite reflection spectrum of glasss LiNbO3 samples on the infrared-visible-ultraviolet light have been measured. Simon, Structural and biological investigations of phosphage glasses with silver, Rom.

Then there was a sudden change upward fellurite 8. The observed glass density ranges from 5. Zainal, Optical properties of ternary tellurite glasses, Materials Science-Poland. Enhancing the optical properties of rare-earth doped inorganic glasses by embedding metallic nanoparticles NPs of controlled sizes and examining the mechanism of enhancement are important and challenging. Although the midwave infrared mm band is studied in this paper, the approach is applicable to other spectral bands.

tellurite glasses thesis

The films had hexagonal shaped grains and the evaluated grain size varied in the range of 20 – 48 nm. Komatsu, An interpretation of optical properties of oxides and oxide glasses glassws therms of the electronic ion polarizability and average single bond strength, Journal of the University of Chemical Technology and Metalurgy.

tellurite glasses thesis

The transmission and reflection spectrum. Zheng, Annealing time dependent 1. The X-ray diffraction studies revealed that nickel atoms were successively incorporated into ZnO host matrix without forming any detectable secondary phase.

The wavelength range is nmnm. The absorption coefficient was calculated by transmission and reflection spectrum. These films achieve tunable band gap characteristics by means of changing the dopant concentration.

Optical Properties of Erbium Doped Tellurite Glasses

An uncooled SiC-based electro-optic device is developed for gas sensing applications. Mohan Babu, Suman Shakya, et al. Each dopant creates an acceptor energy level within the bandgap of the substrate so that the energy gap between this acceptor level and the valence band matches the quantum of energy emitted by tel,urite gas of interest. The structural properties measured by using FTIR show that telluirte the AgCl content increases, the sharp infrared IR absorption peaks were consistently shifted from The photons of the gas excite electrons from the valence band to the acceptor level, which alters the electron density in these two states.

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All the grown films were polycrystalline with the plane as the preferred orientation and the tellurrite position shifted towards higher diffraction angle with the increase of doping content in the films.

LiNbO3 is an important crystal which has piezoelectric, ferroelectric and electro-optical functions. The effect of Ni-doping on the structural and optical properties of the layers was evaluated using appropriate techniques.

tellurite glasses thesis

Affa Rozana Abdul Rashid, P. The absorption peaks around cm-1 and cm-1 are related to the stretching vibrations of the hydroxyl group participating in the strong metal and hydrogen bonding, respectively.

Ahmed, New tellurite glasses: Pal, Structural characterization of borate glassss containing zinc and manganese oxides, Journal of Modern Physics.