Theoretical calculations of mass attenuation coefficients, partial interactions, atomic cross-section, and effective numbers PbO-based silicate, borate, phosphate glass systems have been investigated at 662 keV. silicate has found with the highest total coefficient then borate glasses, respectively. Compton scattering dominate interaction contributed to different coefficients in each matrices. The are more appropriate choices as lead-based radiation shielding than system. Moreover,...

Abstract In this work, TiO2 doped in soda lime borosilicate glasses were prepared with chemical compositions of 10Na2O: 30B2O3: 10CaO: (50-x)SiO2: xTiO2 where x = 0.0, 2.0, 4.0, 6.0, 8.0 and 10.0 mol, respectively, investigated their physical optical properties. The results showed that, density did not clearly depend on concentration. molar volumes increased increasing concentration, due to increase nonbridging oxygen. refractive indices absorption edge undoped glass is occurred at the...

This paper is report on the physical and optical properties of development barium-borate-rice husk ash (BaBRHA) glass system. The glasses containing BaO in xBaO:(80-x)B 2 O 3 :20RHA where x = 30, 35, 40 45 wt% have been prepared by melt quenching technique. this are shown from density data. were investigated refractive index transmission using Abbe-refractometer UV-visible spectrometer respectively.

Physical, optical, and luminescence properties of Nd 3+ ions in bismuth barium borate glass system were studied. The glasses prepared by a melt quenching method doped at various 2 O 3 concentrations compositions (40- x )B : 40Bi 20BaO (where = 0.00, 0.50, 1.00, 1.50, 2.00, 2.50 mol%). Luminescence the studied under two excitations 585 750 nm for downconversion. From both excitations, results show emission bands NIR region corresponding to transitions between 4 F 3/2 → I 9/2 (900 nm), 11/2...

In this work, Gd2O3 based glasses with compositions 10CaF2:xGd2O3:(90-x)P2O5 (where x = 5, 10, 15 and 20 mol%) have been prepared by using melt-quenching method investigated their physical, optical gamma-ray shielding properties. The total mass attenuation coefficients increased increasing concentration decreased of photon energies. effective atomic numbers the electron densities are in same trend coefficients. Half-value layers (HVL) at 662 keV were found to decrease concentration. All...

In this work, the Gd2MoB2O9 and Gd2MoB2O9:Dy3+ phosphors have been prepared by solid state reaction their structural luminescence properties studied. The Gd2O3, MoO3, H3BO3 Dy2O3 were used as starting materials homogeneously mixed with appropriate ratio. pressed at 20 tons sintered 800, 850, 900, 950, 1000, 1050 1100°C. phase was confirmed X-ray diffractometer (XRD). photoluminescence spectra measured 257 nm excitation show one emission peak 310 corresponding to 6P7/2→8S7/2 of Gd3+, four...

The aim of this study is to develop soda lime borate (SLB) doped with Dy 3+ glass and investigate their optical luminescence properties, for different applications in photonics optoelectronics. were melt by conventional quenching technique. Optical properties have been determined measuring absorption spectra studied photo spectra. From measurements, there are ten peaks transition 6 H 15/2 F 11/2 + 9/2 at 1262 nm has higher spectral intensity a hypersensitive transition. As result 350...

In this work, subbitumious fly ash in Thailand was sintered at different temperatures and analyzed for their compositions crystal structures. Glasses were prepared from B 2 O 3 mixed with additive Na various concentrations. The results have shown that SiO , Al Fe are the major of ash. structures sintering temperature below to 800 0C mullite quartz occurrence hematite phase 1,000 0C. density, reflective index hardness values found increase increasing concentration. absorption spectra...

Abstract In this work, local sand in Mueang and Kamphaeng Saen district of Nakhon Pathom Province were used as raw material glasses. The glass samples prepared formula 45SiO2 : 20B2O3 10BaO 25Na2O by melt quenching technique. Four difference SiO2 general (GM) fine size 150 μm (GM150) (GK) (GK150). These investigated physical optical properties to compare with from high silica commercial grade (GS). density refractive index values have close reference around 2.6700-2.6896 g/cm 3...

In this work, Fe 2 O 3 doped in soda lime borate glasses were prepared the composition (65-x) B : 10CaO: 25Na O: xFe % mol, (where x is 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0 %mol) by melt quenching technique. The densities, refractive indices, optical spectra colors investigated as a function of concentration. result found that when increasing , absorption peak 3+ ion at 420 nm increased correspond to yellow color glasses, which measured CIE L*a*b* coordinate. Refractive indices densities with higher

This paper reports on the results concerning optical absorption and luminescence properties of 25Gd 2 O 3 -10CaO-10SiO -(55-x) B -xPr (where x is 0.0, 0.5, 1.0, 1.5, 2.0 2.5 mol %) have been synthesized by melting quenching process. The locations peak observed are investigated for first time. It shown that f - transitions in studied glasses allowed distortions Pr 3+ ions. Seven bands corresponding to H 4 → P , 1 I 6 + D G F respectively peaked at 459,483,575,1011,1418,1513 1931 nm. intensity...

In this paper, palm petiole ash (PPA) in Thailand was calcined different temperatures and their structures compositions were analyzed. The glasses from each PPA prepared by melt-quenched technique investigated optical physical properties. results show that, the major of are SiO 2 CaO, MgO, K O P 5 . low-quartz phase all calcining temperatures. tridymite appeared at 800 1,000°C. Glasses produced showed light yellow-brown color. similar samples, correspond with absorption spectra UV-Visible...

Zinc aluminium barium borate glasses doped with Cr3+ ions at the composition of (60-x)B2O3:10ZnO:20BaO:10Al2O3:xCr2O3, where x = 0.01, 0.02, 0.03, 0.04 and 0.05 mol%, have been synthesizedby conventional melt quenching technique 1,100 C for 3 hours. The physical, optical luminescenceproperties zinc were investigated. results showed that density andmolar volume glass samples in range 3.1682-3.2088g/cm3 28.6672-29.9507 cm3/mol,respectively. absorption spectra measured wavelength 200-2,500...

The main purpose of this research is dedicated to the ESR study impurity ions such as Gd3+ in natural zircon crystal because presence usually causes color crystal. Zeeman interaction, weak hyperfine interaction and field due environments will be calculated. Furthermore, relation between resonance magnetic positions spectra applied directions reflect ion site symmetry. change parameters heat-treated at different atmospheres were related zircon.