Nattapon Srisittipokakun

Effects of Ni2+ Ions on Soda Lime Silicate Glasses

In this work, effects of Ni2+ ions on soda lime silicate glasses have been investigated. Glasses were prepared in formula (65-x)SiO2 : 25Na2O : 10CaO: xNiO (where x is 0.00, 0.02, 0.04, 0.06, 0.08 and 0.10 mol%). The densities of glasses not depend on Ni2+ concentration. The refractive indices decreased with increasing of NiO concentration. The optical absorption spectra were measured by uv-visible spectrophotometer and show peaks correspond with Ni2+ in glass matrices. Both of octahedral transitions and tetrahedral transition from Ni2+ ion were found around 450 and 625 nm respectively. The color of glasses were also measured in CIE L* a* b* system.

Investigations of Physical and Optical Properties on Glass from Rice Husk Ash Doped with MnO2

In this research work, physical and optical properties on glass prepared from rice husk ash (RHA) doped with MnO2 glasses were in investigated. RHA was sintered at 1,000 °C and use as a silica source for glass production. The glass sample were prepared and doped with different concentrations of MnO2 ranging from 0.0 to 1.0 mol%. The results are shown that the colors of glass samples were altered from colorless to brown with increasing of MnO2 concentration. Refractive index and density were increased with increasing MnO2 concentration. The absorption peaks at 440 nm were obtained for all Mn doped glasses.

Effect of Addition TiO2 on Bi2O3-TiO2-B2O3 Glasses

Bismuth titanium borate glasses in compositions xTiO2 : (30-x)Bi2O3 : 70B2O3 (with x is in mol%, varying from 0% to 10%) were fabricated by the conventional melt quenching technique. The effect of TiO2 on the physical and spectroscopic properties of bismuth borate glasses have been carried out by means of density and UV-Visible spectroscopy measurement techniques. The density and molar volume of all glasses are found to change depend on TiO2 substitution. The fundamental absorption edges for all glasses have been identified using the theory proposed by Davis and Mott. The optical band gap (Eg) is found to decrease with increase in TiO2 content.

Optical and Physics Investigation of Fe2O3 Doped in Soda-Lime Silicate Glass at Different Melting Temperature

In this work, the effects of melting temperature (1200, 1300, 1400 and 1500 °C) on glass properties, prepared in the composition 64.4SiO2: 10.0CaO: 25.0Na2O: 0.6Fe2O3 have been investigated. The Fe2O3 doped glass shown green color due to the homogeneous distribution of Fe3+ and Fe2+ ions in the glass matrices. Refractive index, dielectric constant, optical dielectric constant and the reflection loss increases when the melting temperature is increased. The absorption bands are observed in the all spectra with the peaks around 380 and 435 nm are attributed to Fe3+ and board peak around 1,050 nm due to Fe2+. The Fe2+ peaks are increased with increasing of melting temperature, correspond with glass color.

Coloration in Soda-Lime-Silicate Glass System Containing Manganese

The UV-visible spectra of soda-lime-silicate glass system with the base composition (65-x) SiO2: 10CaO: 25Na2O: xMnO2 % mol, (where x is 0.0, 0.02, 0.05, 0.10, 0.30 and 0.50 %mol) were studied at room temperature. The results are shown that the colors of glass samples were altered from colorless to dark purple with increasing of MnO2 concentration and were stable at room temperature. The color of glass sample with 0.3 %mol MnO2 was purple. Moreover, it has been found that the density and refractive index were contiguous. The optical absorption spectra can be confirmed the color of these glass samples. They exhibited a predominant broadband around 500 nm and it was clearly observed, its increasing since 0.1 %mol of MnO2. This band corresponds to an allowed transition from 5Eg5T2g, which attributed to Mn3+. When increasing MnO2 concentration, the absorption band due to Mn3+ ion was dominating.

Effect of Fe2O3 and CoO co-doped in soda lime silicate glasses

In the present work, Fe/Co co-doped in soda lime silicate (SLS) glasses were prepared by using normal melt quenching technique. The physical and optical properties of Fe/Co co-doped in SLS glasses such as density, molar volume, refractive index and optical absorption were investigated. The density and refractive index of the samples increases with increasing concentration of CoO. The molar volume values were found to decrease due to the decreasing of number of non-bridging oxygens (NBOs), which will lead to the close packing of atoms. The optical absorption spectrum of Fe/Co co-doped in SLS glasses measured at room temperature in the wavelength region 200–1100 nm. The absorption peak occurred at 380 537 595and 650 nm. In the wavelength at 385 nm has been assigned to the 6A1g(S) → 4T1g(P) transitions of Fe3+. From the Tanabe–Sugano energy level diagram given for d5 configuration, the bands observed at 385 nm have been assigned to the 6A1g(S) → 4T1g(P) transitions. The observed band positions are characteristic of Fe3+ ions in the distorted octahedral environment. In the wavelength at 537 595 and 650 nm have been assigned to 4T1g(F) → 2T1g (H), 4A2(4F) → 4T1 (4P) and 2T2 → 2T transition of Co2+ ions of pure tetrahedral coordinated Co2+ ions in soda lime silicate glasses.In the present work, Fe/Co co-doped in soda lime silicate (SLS) glasses were prepared by using normal melt quenching technique. The physical and optical properties of Fe/Co co-doped in SLS glasses such as density, molar volume, refractive index and optical absorption were investigated. The density and refractive index of the samples increases with increasing concentration of CoO. The molar volume values were found to decrease due to the decreasing of number of non-bridging oxygens (NBOs), which will lead to the close packing of atoms. The optical absorption spectrum of Fe/Co co-doped in SLS glasses measured at room temperature in the wavelength region 200–1100 nm. The absorption peak occurred at 380 537 595and 650 nm. In the wavelength at 385 nm has been assigned to the 6A1g(S) → 4T1g(P) transitions of Fe3+. From the Tanabe–Sugano energy level diagram given for d5 configuration, the bands observed at 385 nm have been assigned to the 6A1g(S) → 4T1g(P) transitions. The observed band positions are characteri...

Optical and Physical Properties of Cu-Co Doped in Soda Lime Silicate Glasses

Co/Cr co-doped in soda lime silicate (SLS) glasses were prepared by using normal melt quenching technique. The current composition was prepared based on the proposed ratio: (64.9-x)SiO2: 10CaO: 25Na2O: 0.1CuO: xCoO where x=0.00, 0.01, 0.02, 0.03, 0.04 and 0.05 mol% were prepared at 1200°C for 3 h, and annealed at 500 °C for 3 h. The physical and optical properties of Co/Cr co-doped in SLS glasses were investigated such as density, molar volume, refractive index and optical absorption were discussed and measured. The optical absorption spectrum of Co/Cr co-doped in SLS glasses measured at room temperature in the wavelength region 200–1100 nm were presented.

Effect of mixed NiO-CuO in soda lime silicate glasses

Ni/Cu co-doped in soda lime silicate (SLS) glasses were prepared by using normal melt quenchingtechnique at 1200oC for 3 h, and annealed at 500 oC for 3 h. The current composition was prepared based on theproposed ratio: (64.98-x)SiO2: 10CaO: 25Na2O: 0.02NiO: xCuO where x=0.0, 0.1, 0.2, 0.3, 0.4 and 0.5 mol%.The physical and optical properties of Ni/Cu co-doped in SLS glasses such as density, molar volume, refractiveindex and optical absorption were measured and discussed. The optical absorption spectrum of Ni/Cu co-dopedin SLS glasses measured at room temperature in the wavelength region 200–1100 nm were presented.

Optical and Luminescence Properties of Dy3+ Doped in Soda Lime Borate Glasses

The aim of this study is to develop soda lime borate (SLB) doped with Dy3+ glass and investigate their optical and luminescence properties, for different applications in photonics and optoelectronics. The glass were melt by conventional melt quenching technique. Optical properties have been determined by measuring their absorption spectra and luminescence properties were studied by photo luminescence spectra. From optical absorption measurements, there are ten peaks with transition 6H15/2 to 6F11/2 + 6H9/2 at 1262 nm has higher spectral intensity and is a hypersensitive transition. As a result of 350 nm excitation the photoluminescence spectra have four peaks. Higher luminescence intensity peak was observed for 0.5 mol% Dy3+ doped SLB glass at 4F9/2 to 6H13/2 (575 nm). Hence it is suggest from the chromaticity results that SLB glasses with different Dy2O3 concentration may be a promising glass for white LED under 350 nm excitation wavelength. Further investigation is under way for the optimization of different dopend concentration in the SLB glass.

Effect of Mixed Mn-Co Ions in Soda Lime Silicate Glasses

Physical and optical properties of mixed Mn-Co ions in soda lime silicate glasses were measured and calculated. The results show that, the densities increased with the increasing of CoO content. This indicates that increasing the molecular weight of oxide ions used in the glass was due to the replacing SiO2 by CoO. The refractive indices were increased with increasing of CoO concentration. The absorption peaks of CoO doped glasses occurred at the wavelength around 511, 584 and 649 nm which are assigned to 4A2(F) ® 2A1(G), 4A2(F) ® 4T1(P) and 4A2(F) ® 2E(G) transition, respectively.