Physical and Structural Properties of Neodymium Doped Lithium Boro-Tellurite Glasses

2019 ◽  
Vol 290 ◽  
pp. 53-59
Author(s):  
Yahya Norihan ◽  
Ahmad Ridzwan Bin Ab Rahim ◽  
Mardhiah Abdullah
Keyword(s):  
Structural Properties ◽  
Xrd Analysis ◽  
Ftir Spectra ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Prepared Glass ◽  
Amorphous Nature ◽  
Quenching Method ◽  
Xrd Patterns

Nd3+ doped lithium borotellurite glasses were successfully been prepared by conventional melt-quenching method with the chemical composition (70.0)B2O3-(5.0)TeO2-(25.0-x) Li2CO3-xNd2O3 (where x = 0.0, 0.2, 0.4, 0.6, 0.8 and 2.0 mol%) by varying the Neodymium content. The physical properties such as density, molar volume and oxygen packing density were measured. The structural properties have been studied through X-ray diffraction (XRD) analysis and Fourier Transform Infrared (FTIR) spectroscopy. The XRD pattern has been used to confirm the amorphous nature of the glass samples. There are no sharp peaks were observed in XRD patterns of the glass samples which confirmed the amorphous nature of the glass. FTIR spectra were used to analyse the functional groups present in the glass samples. The FTIR spectra reveal the presence of B-O-B, B-O, BO3, BO4,Te-O and characteristic of the hydrogen bond in the prepared glass samples.

The Preparation and Physical Characteristic of Sm3+ Doped Borotellurite Glass

2016 ◽  
Vol 846 ◽  
pp. 69-74 ◽  
Author(s):  
M.R.S. Nasuha ◽  
K. Azman ◽  
H. Azhan ◽  
S.A. Senawi ◽  
Mardhiah Abdullah
Keyword(s):  
Physical Properties ◽  
Molar Volume ◽  
Potential Candidate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Prepared Glass ◽  
Amorphous Nature ◽  
Compositional Changes ◽  
Optical Applications ◽  
Quenching Method

Borotellurite glasses were generally applied in rare earth optical materials due to their excellent physical properties. Samarium doped borotellurite glasses have been identified as one of the potential candidate for optical applications. Therefore, the aim of this study is to identify the physical properties of Sm3+ doped borotellurite glasses by mean of their density, molar volume, microhardness and X-ray diffraction. In this study, the Sm3+ doped borotellurite glasses of the system (70-x)TeO2-20B2O3-10ZnO-xSm2O3 as the samarium trioxide varies from (x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol%) have been prepared by melt-quenching method. The amorphous nature of the prepared glass samples have been confirmed through XRD spectral analysis. The values of density are found to vary from 4.541g/cm3 to 4.837g/cm3 as well as the values of molar volume as it varies from 29.118cm3/mol to 28.314cm3/mol with the increase of Sm3+ content. The physical properties corresponding to compositional changes have been analysed and the result are reported and presented.

Influence of NiO Nanoparticles on Physical Properties of TiO2 Doped Magnesium Ultra-Phosphate Glass-Ceramics

2015 ◽  
Vol 1107 ◽  
pp. 32-37
Author(s):  
S.F. Abd Rahman ◽  
M.R. Sahar ◽  
Sib Krishna Ghoshal
Keyword(s):  
Physical Properties ◽  
Glass Ceramics ◽  
Nio Nanoparticles ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Amorphous Nature ◽  
Quenching Method ◽  
Nio Nps ◽  
Controlled Doping

Tuning the physical properties of inorganic glass-ceramics through controlled doping of magnetic nanoparticles is topically challenging. A series of glass-ceramic having chemical composition 75P2O5-17MgO-(3-x)TiO2-5Li2O with x = 0 to 3 mol% containing nickel oxide (NiO) nanoparticles (NPs) are prepared by melt quenching method (MQT) via heat treatment at 350 °C. The effect of NiO NPs on thermal and magnetization response are examined. X-Ray Diffraction (XRD) pattern confirm the amorphous nature of the samples. Differential Thermal Analysis (DTA) measurement shows the decrement of glass stability from 327°C to 295°C with the increase of titanium dioxide (TiO2) contents which are glass seem to be unstable. Significant increase in the magnetization is evidenced with the increase of NiO nanoparticles from 1.5 mol% to 2 mol%. The improved physical properties of these glass-ceramics suggest their usefulness in photo-electronic.

Analysis of Selected Area Diffraction Patterns With Winjade

1998 ◽  
Vol 4 (S2) ◽  
pp. 342-343 ◽  
Author(s):  
S. D. Walck ◽  
P. Ruzakowski-Athey
Keyword(s):  
Single Phase ◽  
Xrd Analysis ◽  
Analysis Program ◽  
X Ray Diffraction ◽  
Program Module ◽  
Vast Number ◽  
One Dimensional ◽  
X Ray ◽  
Diffraction Patterns ◽  
Xrd Patterns

The analysis of Selected Area Diffraction (SAD) patterns that are collected from a single phase material having sufficient crystallites to provide continuous rings is relatively straightforward. However, when this condition is not met and there may be several phases present having rings of a spotty nature, the pattern is complex and can be quite difficult to analyze manually because of the vast number of discrete spots. WinJade from MDI is an X-ray diffraction (XRD) analysis program with an Electron Diffraction Program Module (EDPM) that can be used to aid in the analysis of SAD patterns. The EDPM produces Integrated Circular Density Plots (ICDP), which are one-dimensional intensity profiles plotted as a function of equivalent XRD 20 values or crystal d-spacings. These ICDP's can be overlayed with XRD patterns or with reference lines from the NIST and JCPDS crystalline databases for direct comparisons.

scholarly journals Effect of Neodymium Concentration on Structural and Optical Properties of Tellurite Based Glass System

2016 ◽  
Vol 846 ◽  
pp. 183-188 ◽  
Author(s):  
M.N. Azlan ◽  
Mohamed Kamari Halimah ◽  
S.O. Baki ◽  
W.M. Daud
Keyword(s):  
Optical Properties ◽  
Diffraction Method ◽  
Transmission Band ◽  
Glass System ◽  
X Ray Diffraction ◽  
X Ray ◽  
Amorphous Nature ◽  
Neodymium Concentration ◽  
Quenching Method ◽  
Xrd Method

Neodymium doped zinc borotellurite glass system were fabricated by using conventional melt-quenching method. The structural properties of the glass system were characterized by using X-ray Diffraction (XRD) method and Fourier Transform analysis (FTIR). The amorphous nature of the glass system was confirmed by using x-ray diffraction method. The transmission band of TeO3 structural units which indicate the existence of non-bridging oxygen was shown by FTIR analysis. The optical properties of the glass system were determined by using UV-Vis spectrophotometer. Several bands were shown in the absorption spectra which indicate the characteristic of neodymium ions. The obtained values of indirect optical band gap, Eopt lies in the range of 3.151 eV and 3.184 eV.

Structural Properties of Erbium Doped Tellurite Glass Embedded with Natural Ferrite Oxide Nanoparticles

2017 ◽  
Vol 268 ◽  
pp. 177-180 ◽  
Author(s):  
Puzi Anigrahawati ◽  
Md Rahim Sahar
Keyword(s):  
Wave Number ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Raman Spectroscopic ◽  
Trigonal Bipyramidal ◽  
Erbium Doped ◽  
Amorphous Nature ◽  
Glassy Materials ◽  
Quenching Method

Natural ferrite oxide nanoparticles (NPs) embed with tellurite glasses ((89-x) TeO2-10ZnO-1Er2O3-(x)Fe3O4, (x = 0 – 0.8 mol %)) were prepared by conventional melt quenching method to study the influence of the Fe3O4 NPs concentration on the stuctural properties of the glass. Studies on these glassy materials characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and RAMAN spectroscopic measurements are presented. It is observed that the amorphous nature of the glass is confirmed by x-ray diffraction. The FTIR studies support the formation of Te-O-Fe linkages. The FTIR spectra reveal modification in network structures evidenced from vibrational wave-number shifts of TeO4 and TeO3 structural units. Raman spectroscopy have been manipulated to observe the structural modification of [TeO4] trigonal bipyramidal structural unit.

Synthesis and Optical Properties of Eu3+ Doped NaYF4 and KYF4 Micro/Nanocrystals

2016 ◽  
Vol 16 (4) ◽  
pp. 3857-3860 ◽  
Author(s):  
Siling Guo ◽  
Chunyan Cao ◽  
Renping Cao
Keyword(s):  
Optical Properties ◽  
Emission Spectra ◽  
Local Environment ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Two Samples ◽  
Xrd Patterns ◽  
The Eu

Through a hydrothermal method, 1 mol% Eu3+ doped NaYF4 and KYF4 micro/nanocrystals have been synthesized. The materials were characterized by X-ray diffraction (XRD) patterns, field emission scanning electron microscopy (FE-SEM) images, room temperature photoluminescence (PL) excitation and emission spectra, and luminescent dynamic decay curves. The XRD analysis suggested the crystalline structures of the obtained samples. The FE-SEM images indicated the morphology and size of the obtained samples. The PL spectra illustrate the optical properties of Eu3+ in the two samples. Since it is sensitive to the local environment of the ion, the Eu3+ presents different optical properties in the NaYF4 and KYF4 materials.

The structure of zeolite LZ-277

1994 ◽  
Vol 52 ◽  
pp. 784-785
Author(s):  
C. A. Bateman ◽  
R. M. Kirchner
Keyword(s):  
Pore Size ◽  
Diffraction Pattern ◽  
Molecular Sieve ◽  
Unit Cell ◽  
Physical Mixture ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
Space Group ◽  
X Ray ◽  
Xrd Patterns

LZ-277 is a new aluminosilicate molecular sieve. It has an x-ray diffraction (XRD) pattern nearly identical to zeolite phi but with a much smaller pore size. Whether LZ-277 and phi-like materials are intergrowths or a physical mixture of phases has been a matter of debate. The ability to determine the structure of complex zeolites has been enhanced by HREM and, more recently, by the ability to simulate XRD patterns of faulted materials. In this study, the structure of zeolite LZ-277 is reported and confirmed by simulating the XRD pattern of this highly faulted material.The low magnification micrograph shows the faulted and intergrown disc morphology typical of this material (Figure 1). The faulting is most typically twinning on (001), and is shown in the [010] diffraction pattern (Figure 2). The pattern is indexed on an a = 1.38 nm, c = 1.50 nm unit cell and both lattice parameters and systematic absences are consistent with chabazite in space group Rm.

Solvothermal Synthesis and Magnetic Properties of Fe3O4 Microspheres

2011 ◽  
Vol 393-395 ◽  
pp. 947-950
Author(s):  
De Hui Sun ◽  
Ji Lin Zhang ◽  
De Xin Sun
Keyword(s):  
Room Temperature ◽  
Size Range ◽  
Solvothermal Method ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Magnetic Investigation ◽  
Xrd Patterns ◽  
Fe3o4 Microspheres ◽  
Ftir Absorption Spectra

We synthesized Fe3O4 microspheres using a solvothermal method and characterized their morphologies, structures, surface property and magnetism by field emission scanning electron microscopy (FE-SEM), powder X-ray diffraction (XRD) patterns, Fourier transform infrared (FTIR) absorption spectra, and vibrating sample magnetometer (VSM). The results showed that the synthesized Fe3O4 microspheres with a tunable size range of ca. 80–200 nm are composed of many Fe3O4 collective nanoparticles. XRD pattern confirmed that the Fe3O4 microspheres belong to cubic structure. Magnetic investigation reveals that the Fe3O4 microspheres have higher saturation magnetization and negligible coercivity at room temperature.

scholarly journals Lanthanum Influence onEuAlO3Perovskite Structural Properties: Experimental and Molecular Dynamics Studies

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Enrique Lima ◽  
María Elena Villafuerte-Castrejón ◽  
José Saniger ◽  
Victor Lara ◽  
Jorge E. Sánchez-Sánchez ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Structural Properties ◽  
Mas Nmr ◽  
Ftir Spectra ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lanthanum Ions ◽  
Simulation Results ◽  
Dynamics Simulations

X-ray diffraction,27Al MAS NMR, and FTIR spectra along with results of molecular dynamics simulations were used to characterise LaxEu1−xAlO3perovskites forx=0.3,  0.1. Experimental and simulation results show that local changes in the perovskite-like structure can be achieved as lanthanum ions substitute europium ones. The introduction of La3+ions in the EuAlO3parent causes an increase in the mobility of oxygen network.

Identification of a deleterious phase in photocatalyst based on Cd1 − xZnxS/Zn(OH)2by simulated XRD patterns

2017 ◽  
Vol 73 (3) ◽  
pp. 360-368 ◽  
Author(s):  
Svetlana Cherepanova ◽  
Dina Markovskaya ◽  
Ekaterina Kozlova
Keyword(s):  
Experimental Data ◽  
Thermogravimetric Analysis ◽  
Variable Temperature ◽  
Interlayer Distance ◽  
Water Molecules ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Diffraction Peaks ◽  
Xrd Patterns

The X-ray diffraction (XRD) pattern of a deleterious phase in the photocatalyst based on Cd1 − xZnxS/Zn(OH)2contains two relatively intense asymmetric peaks withd-spacings of 2.72 and 1.56 Å. Very small diffraction peaks with interplanar distances of (d) ≃ 8.01, 5.40, 4.09, 3.15, 2.49 and 1.35 Å are characteristic of this phase but not always observed. To identify this phase, the XRD patterns for sheet-like hydroxide β-Zn(OH)2and sheet-like hydrozincite Zn5(CO3)2(OH)6as well as for turbostratic hydrozincite were simulated. It is shown that the XRD pattern calculated on the basis of the last model gives the best correspondence with experimental data. Distances between layers in the turbostratically disordered hydrozincite fluctuate aroundd≃ 8.01 Å. This average layer-to-layer distance is significantly higher than the interlayer distance 6.77 Å in the ordered Zn5(CO3)2(OH)6probably due to a deficiency of CO32−anions, excess OH−and the presence of water molecules in the interlayers. It is shown by variable-temperature XRD and thermogravimetric analysis (TGA) that the nanocrystalline turbostratic nonstoichiometric hydrozincite-like phase is quite thermostable. It decomposes into ZnO in air above 473 K.

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