The Colorants Effects of Fe2O3 on Borosilicate Glasses Prepared from Subbituminous Fly Ash

2015 ◽  
Vol 1119 ◽  
pp. 731-735
Author(s):  
W. Rachniyom ◽  
Y. Ruangtaweep ◽  
K. Boonin ◽  
K. Phachana ◽  
J. Kaewkhao
Keyword(s):  
Refractive Index ◽  
Fly Ash ◽  
Chemical Composition ◽  
Crystal Structures ◽  
Absorption Spectra ◽  
Borosilicate Glasses ◽  
Ferrous Ions ◽  
Melt Quenching ◽  
Hardness Values

In this work, the subbituminous fly ash (SFA) in Thailand has been investigated for their compositions and crystal structures. Borosilicate glasses were prepare from SFA , B2O3, Na2O and various concentration of Fe2O3 by melt quenching technique. The results have shown that the chemical composition comprised with SiO2, Al2O3 and Fe2O3. The crystal structures of SFA were raised of mullite and quartz phases. The density and refractive index values of glasses were found to increase with increasing of Fe2O3 concentrations. The hardness values have been decreased with increasing of Fe2O3 content. The absorption spectra are corresponding to ferric and ferrous ions in wavelength of 440 nm and 1,050 nm and the color of glasses are green to yellow.

Effects of Na2O on Borosilicate Glasses Prepared from Coal Fired Ash

2014 ◽  
Vol 979 ◽  
pp. 271-274 ◽  
Author(s):  
W. Rachniyom ◽  
Y. Ruangtaweep ◽  
J. Kaewkhao ◽  
S. Ruengsri ◽  
K. Phachana
Keyword(s):  
Fly Ash ◽  
Crystal Structures ◽  
Absorption Spectra ◽  
Industrial Waste ◽  
Sintering Temperature ◽  
Glass Production ◽  
Borosilicate Glasses ◽  
Hematite Phase ◽  
Different Temperatures ◽  
Hardness Values

In this work, subbitumious fly ash in Thailand was sintered at different temperatures and analyzed for their compositions and crystal structures. Glasses were prepared from B2O3 mixed with subbitumious fly ash and additive Na2O in various concentrations. The results have shown that SiO2, Al2O3 and Fe2O3 are the major compositions of the fly ash. The crystal structures of fly ash at sintering temperature below to 800 0C are mullite and quartz with the occurrence of hematite phase at 1,000 0C. The density, reflective index and hardness values were found to increase with the increasing of Na2O concentration. The absorption spectra corresponded to the color of the glass (yellow to brown). The higher the Na2O concentration is, the lighter the color of the glasses. The results from this work demonstrated the possibility of glass production from subbitumious fly ash and utilization of industrial waste in Thailand.

Samarium Ions Concentration Dependent Optical Enhancement in Phosphate Glass

2015 ◽  
Vol 1107 ◽  
pp. 449-453
Author(s):  
Ramli Arifin ◽  
Lee Pei San ◽  
Md Rahim Sahar ◽  
Sib Krishna Ghoshal ◽  
Khaidzir Hamzah
Keyword(s):  
Rare Earth ◽  
Chemical Composition ◽  
Absorption Spectra ◽  
Phosphate Glass ◽  
Emission Spectra ◽  
Photonic Devices ◽  
Phosphate Glasses ◽  
Significant Enhancement ◽  
Melt Quenching ◽  
Nir Absorption

Glasses activated rare earth (RE) ions are demanding for photonic devices. Optimization of rare earth dopants, chemical composition of glass former and modifier decides spectra features. We synthesize a series of glass having composition (50-x)P2O5 - 30Li2O - 20Na2O - (x)Sm2O3, where x = 0 to 2.0 mol% (optimizing RE concentration) via melt-quenching technique. The effects of Sm2O3 concentration on significant enhancement of absorption and luminescence are scrutinized. The UV-Vis-NIR absorption spectra reveal ten band and the emission spectra exhibit four peaks specific to the dopant. The results suggest that samarium doped phosphate glasses are potential for laser and other applications.

Structural and optical investigations of CdO-Na2CO3-H3BO3 glasses

2015 ◽  
Vol 93 (7) ◽  
pp. 796-801 ◽  
Author(s):  
Shaweta Mohan ◽  
D.P. Singh ◽  
Simranpreet Kaur
Keyword(s):  
Refractive Index ◽  
Optical Absorption ◽  
Ftir Spectroscopy ◽  
Absorption Spectra ◽  
Urbach Energy ◽  
Optical Absorption Spectra ◽  
Melt Quenching ◽  
Amorphous Nature ◽  
Mobility Gap

Glasses with composition xCdO-(40-x) Na2CO3-60H3BO3; x = 10, 20, 30 and 40 mol% were prepared by conventional melt-quenching technique and checked by XRD technique for their amorphous nature. An increase in density and refractive index of the samples with an increase in content of CdO has been observed and discussed. The optical absorption spectra of the glasses were recorded in the range 200–1100 nm and was used to find optical mobility gap, Urbach energy, and cut-off wavelength for each sample. The decrease in optical mobility gap with increase in CdO points towards the compactness of the structure with the addition of CdO. FTIR spectroscopy reveals the presence of trigonal and tetrahedral borate units, and the results indicate the conversion of BO3 to BO4 units with the increase in CdO content.

Physical, Optical and Luminescence Properties of Er3+-Doped Bismuth Borosilicate Glasses

2016 ◽  
Vol 675-676 ◽  
pp. 372-375 ◽  
Author(s):  
Suwat Rakpanich ◽  
Piyachat Meejitpaisan ◽  
Jakrapong Kaewkhao
Keyword(s):  
Energy Level ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Emission Spectra ◽  
Luminescence Properties ◽  
Borosilicate Glasses ◽  
Optical Absorption Spectra ◽  
Melt Quenching ◽  
Glass Matrices

Er3+-doped bismuth borosilicate glasses (Bi2O3+B2O3+SiO2+Er2O3) glasses doped with different Er2O3 concentrations (0, 0.50, 1.00, 1.50, 2.00, 2.50 mol%) have been prepared by melt quenching technique and their physical, optical and luminescence properties have been studied. The density of glasses showed the highest value at 4.7358 g/cm3 with 1.00 mol% of Er2O3. The optical absorption spectra of glasses were observed seven bands at 488, 523, 543, 654, 801, 975 and 1529 nm which assigned to the transitions 4I15/2→4F7/2, 2H11/2, 4S3/2, 4F9/2, 4I9/2, 4I11/2 and 4I13/2, respectively. The emission spectra of glasses were also investigated and discussed in term of energy level of Er3+ ion in glass matrices.

Effect of Lead Oxide on Glass Properties Produced from Rice Husk Fly Ash

2012 ◽  
Vol 506 ◽  
pp. 563-566 ◽  
Author(s):  
Y. Ruangtaweep ◽  
Jakrapong Kaewkhao ◽  
N. Srisittipokakun ◽  
Pichet Limsuwan
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Fly Ash ◽  
Rice Husk ◽  
Lead Oxide ◽  
Rice Husk Ash ◽  
Glass Production ◽  
Raw Material ◽  
Melt Quenching ◽  
Glass Properties

In this work, the glass samples were prepared from the rice husk ash (RHA) with different PbO concentrations by melt-quenching technique. The effect of PbO on the physical and optical properties of the glasses from RHA have been studied. The results showed that the refractive index and density increased with increasing PbO concentration. The absorption spectra of all samples showed the cut-off wavelength approximately at 360 nm. For comparison, similar properties of SiO2 glass doped with different PbO concentrations were also studied. It was found that the RHA is possible to be used as a raw material in the glass production.

Effect of Nd3+ Ion on Bismuth Borosilicate Glass Properties

2016 ◽  
Vol 702 ◽  
pp. 13-17
Author(s):  
S. Rakpanich ◽  
Piyachat Meejitpaisan ◽  
Sunantasak Ravangvong ◽  
Jakrapong Kaewkhao
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
Borosilicate Glass ◽  
Emission Spectra ◽  
Borosilicate Glasses ◽  
Optical Absorption Spectra ◽  
Melt Quenching ◽  
Molar Volumes ◽  
Doped Glass ◽  
Glass Properties

This paper reports neodymium doped bismuth borosilicate glasses in composition (40-x)B2O3-40Bi2O3-20SiO2-xNd2O3 where x = 0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol%, have been prepared by melt quenching technique and are characterized through physical properties structural properties, optical absorption spectra and emission spectra measurements. The density is found to increase with the increase in concentration of Nd2O3. The molar volumes of glass decrease where concentration of Nd2O3 where concentration of Nd2O3 is 0-0.5 mol% and beyond 0.5 mol% that molar volumes were increased. The absorption spectra of Nd3+-doped glass centered at 512 nm (4I9/2→2K13/2+4G9/2), 526 nm (4I9/2→4G7/2), 584 nm (4I9/2→4G5/2+2G7/2), 625 nm (4I9/2→2H11/2), 681 nm (4I9/2→4F9/2), 747 nm (4I9/2→4F7/2+4S3/2), 804 nm (4I9/2→4F5/2+2H9/2) and 877 nm (4I9/2→4F3/2) have been observed. The emission spectra of glass were also investigated.

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