scholarly journals Influence of Homogenization and Micro/Nano Source of Starting Powders on Format Ion of the Single YAP Phase

2016 ◽  
Vol 61 (4) ◽  
pp. 1753-1760 ◽  
Author(s):  
D. Michalik ◽  
T. Pawlik ◽  
J. Plewa ◽  
M. Sopicka-Lizer
Keyword(s):  
Low Cost ◽  
Diffraction Method ◽  
Solid State Reaction Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Small Areas ◽  
Oxide Powders ◽  
Heat Treated ◽  
Interesting Task

Abstract Manufacturing high purity polycrystalline YAlO3 (YAP) ceramics could replace monocrystalline YAP thus recently it is an interesting task for low cost producers of scintillators. The paper presents influence of different source of initial oxide powders (micro/nano powders of Y2O3 and Al2O3) and the method of their homogenization on the formation of a YAP phase. The solid state reaction method was used to prepare YAP powder or ceramic pellets. After preheating, all samples in the form of powders and pellets were heat-treated in the temperature range of 1050-1650 °C. DTA method was applied for examination of the phase crystallization in the tested system. X-ray diffraction method (XRD) was used for characterization of the phase composition. X-ray microanalysis (EDS) was used to control homogeneity in the small areas. Morphology of the resultant samples are presented on SEM pictures. The results show a significant influence of the starting powders on the homogeneity, purity and temperature of formation of the main phase.

Effect of Ni0.5Zn0.5Fe2O4 Nanoparticles Addition on Tl-1212 High Temperature Superconductor

2020 ◽  
Vol 307 ◽  
pp. 98-103
Author(s):  
Wei Kong ◽  
Christopher Jacob ◽  
Ing Kong ◽  
Cin Kong ◽  
Eng Hwa Yap ◽  
...  
Keyword(s):  
Critical Current ◽  
High Temperature Superconductor ◽  
Diffraction Method ◽  
Solid State Reaction Method ◽  
Transport Critical Current Density ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxide Powders ◽  
A Value ◽  
Average Size

The effects of Ni0.5Zn0.5Fe2O4 nanoparticle addition on the superconducting and transport properties of (Tl0.85Cr0.15)Sr2CaCu2O7 (Tl-1212) superconductor were investigated in this paper. The Tl-1212 samples were produced by mixing high purity oxide powders through a solid-state reaction method. Nano Ni0.5Zn0.5Fe2O4 particles with compositions of 0.001 wt.%, 0.003 wt.%, 0.005 wt.%, 0.01 wt.% and 0.02wt.% with average size of 60 nm were added into the Tl-1212 powders. The transition temperatures (Tc-zero and Tc-onset) were measured using a four-point probe method. The highest Tc-zero recorded was 97 K which was exhibited by the pure Tl-1212 sample. The transport critical current, Ic, of the Tl-1212 samples were found through the 1 µV/cm criterion with temperature ranging from 30 K to 77 K. The sample with a composition of 0.003 wt.% displayed the highest value of Jc at 77 K with a value ranging up to 1780 mA/cm2. The Tl-1212 samples were characterised using scanning electron microscopy (SEM), powder X-ray diffraction method (XRD), energy dispersive X-Ray analysis (EDX), electrical resistance measurements and transport critical current density measurements. The Jc of the Tl-1212 superconductor has been improved through the addition of Ni0.5Zn0.5Fe2O4 nanoparticles but adding an excessive amount has caused its Jc to degrade.

SYNTHESIS AND CHARACTERIZATION OF POTASSIUM SODIUM NIOBATE PHASES

2008 ◽  
Vol 22 (13) ◽  
pp. 2169-2176
Author(s):  
N. BOUTAOUI ◽  
A. BENABBES ◽  
K. RAMDANE
Keyword(s):  
Diffraction Method ◽  
Solid State Reaction Method ◽  
Potassium Niobate ◽  
Sodium Niobate ◽  
X Ray Diffraction ◽  
Stoichiometric Mixture ◽  
Potassium Sodium Niobate ◽  
Sem Images ◽  
X Ray

Potassium niobate KNbO 3 and some compounds of ( K 1-x Na x) NbO 3 (x = 0.3, 0.4, 0.6, 0.7) ceramics powders were successfully prepared by the solid-state reaction method using a non-stoichiometric mixture of starting materials. A possible formation of these phases was proposed based on the experimental results. All of the prepared compounds were characterized using the X-ray diffraction method, and grain size has been calculated using SEM images, and their stoichiometry was obtained from the EDAX results.

scholarly journals Investigations of M3Al8O15:Eu3+,Dy3+ (M = Ba, Ca, Mg) phosphors

2016 ◽  
Vol 34 (2) ◽  
pp. 412-417
Author(s):  
Esra Öztürk
Keyword(s):  
Electron Microscopy ◽  
Solid State Reaction Method ◽  
Morphological Characterization ◽  
X Ray Diffraction ◽  
Reaction Method ◽  
X Ray ◽  
Three Samples ◽  
Scanning Electron ◽  
The Eu

AbstractIn this work, aluminate type phosphorescence materials were synthesized via the solid state reaction method and the photoluminescence (PL) properties, including excitation and emission bands, were investigated considering the effect of trace amounts of activator (Eu3+) and co-activator (Dy3+). The estimated thermal behavior of the samples at certain temperatures (> 1000 °C) during heat treatment was characterized by differential thermal analysis (DTA) and thermogravimetry (TG). The possible phase formation was characterized by X-ray diffraction (XRD). The morphological characterization of the samples was performed by scanning electron microscopy (SEM). The PL analysis of three samples showed maximum emission bands at around 610 nm, and additionally near 589 nm, 648 nm and 695 nm. The bands were attributed to typical transitions of the Eu3+ ions.

scholarly journals Making and Characterization of Limnpo4 Using Solid State Reaction Method for Lithium Ion Battery Cathodes

2019 ◽  
pp. 583-588
Author(s):  
Adelyna Oktavia ◽  
Kurnia Sembiring ◽  
Slamet Priyono
Keyword(s):  
Solid State ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Solid State Reaction Method ◽  
Raw Material ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
X Ray ◽  
General Investigation

Hospho-material of olivine, LiMnPO4 identified as promising for cathode material generation next Lithium-ion battery and has been successfully synthesized by solid-state method with Li2Co3, 2MnO2, 2NH4H2PO4 as raw material. The influence of initial concentration of precursors at kalsinasi temperatures (400-800 ° C) flows with nitrogen. The purity and composition phase verified by x-ray diffraction analysis (XRD), scanning electron microscopy (SEM), spectroscopy, energy Dispersive x-ray Analysis (EDS), Raman spectra. General investigation shows that there is a correlation between the concentration of precursors, the temperature and the temperature of sintering kalsinasi that can be exploited to design lithium-ion next generation.

Microstructure Characterization of the Reaction Interface between CBN Grain and Titanium-Deposited Film

2012 ◽  
Vol 538-541 ◽  
pp. 166-171
Author(s):  
Wen Feng Ding ◽  
Yang Min Liang ◽  
Jian He ◽  
Li Tang ◽  
Jie Yu ◽  
...  
Keyword(s):  
Heating Temperature ◽  
Cubic Boron Nitride ◽  
High Vacuum ◽  
Reaction Products ◽  
X Ray Diffraction ◽  
X Ray ◽  
Energy Dispersion Spectrometer ◽  
Heat Treated ◽  
Deposited Film

Cubic boron nitride (CBN) abrasive grains with surface titanium-deposited film were heat-treated during 550-950°C for 60 min under high vacuum circumstance. Detailed interfacial compounds analysis by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersion spectrometer (EDS), differential thermal analysis (DTA) indicates that the interfacial reactions are much dependent on the heating temperature to some extents, and the reaction products, TiN, TiB2 and TiB chiefly form the network structure. In particular, at 950°C the transition layers with excellent performance, CBN/TiB2/TiB/(TiB+TiN)/TiN/CBN, is realized.

Preparation and Characterization of Alpha Cellulose of Pineapple (Ananas comosus) Leaf Fibres (PALF)

2014 ◽  
Vol 895 ◽  
pp. 147-150 ◽  
Author(s):  
Nur Ain Ibrahim ◽  
Noriean Azraaie ◽  
Nurul Aimi Mohd Zainul Abidin ◽  
Nur Amira Mamat Razali ◽  
Fauziah Abdul Aziz ◽  
...  
Keyword(s):  
Low Cost ◽  
Research Work ◽  
Natural Fibre ◽  
Ananas Comosus ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Family ◽  
Main Component

The main component in natural fibre is cellulose (C6H10O5)n. Cellulose from agricultural by-product is abundant, low cost, eco-friendly, biodegradable, and renewable. This research work was prepared alpha cellulose from pineapple leaf fibre (PALF), which obtained from the leaves of pineapple plant, Ananas comosus belonged to the family Bromeliaceae. The treated and untreated samples were characterized using X-ray diffraction (XRD).

Synthesis and Characterization of Zinc Doped Hydroxyapatite for Bone Substitute Applications

2014 ◽  
Vol 660 ◽  
pp. 942-946
Author(s):  
Mohamad Firdaus Abdul Wahid ◽  
C.M. Mardziah ◽  
Koay Mei Hyie ◽  
N.R. Nik Roselina
Keyword(s):  
Crystal Size ◽  
Diffraction Method ◽  
Lattice Parameters ◽  
Phase Changes ◽  
Precipitation Method ◽  
Zinc Ions ◽  
Crystal Shape ◽  
X Ray Diffraction ◽  
X Ray

Hydroxyapatite was prepared by using precipitation method. The substitution of zinc ions in hydroxyapatite structure was studied by several characterization techniques. Several concentration of zinc ions were substituted into hydroxyapatite. Characterization technique such as X-ray diffraction method was used to study the phase changes and the lattice parameters with the addition of zinc. Field emission scanning electron microscopy was used to examine the influence of zinc on the crystal size and the morphology of the as-synthesized powders. Based on X-ray diffraction result, the addition of zinc affects the lattice parameters and phase. The result showed that zinc ions were substituted in the structure. As zinc substitution increased, the lattice parameters a and c decreased. The crystal shape of hydroxyapatite without zinc ions was regular shapes while hydroxyapatite with zinc ions was irregular and also tends to agglomerates with single particle was calculated about 28 - 34 nm .

scholarly journals Growth and Characterization of Pure and Doped L-Alanine Tartrate Single Crystals

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
K. Rajesh ◽  
B. Milton Boaz ◽  
P. Praveen Kumar
Keyword(s):  
Single Crystals ◽  
Vickers Microhardness ◽  
Diffraction Method ◽  
Dielectric Studies ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cell Parameters ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Single crystals of pure and Lanthanum doped L-Alanine Tartrate were grown by slow evaporation method. The cell parameters were determined using single crystal X-ray diffraction method. To improve the physical properties of the LAT crystal, Lanthanum dopant was added by 2 mol%. ICP studies confirm the presence of Lanthanum in the grown LAT crystal. Transparency range of the crystal was determined using UV-VIS-NIR spectrophotometer. The functional groups of pure and doped LAT crystals were analyzed by FT-IR spectroscopy. Using Vickers microhardness tester, mechanical strength of the material was found. Dielectric studies of pure and doped LAT single crystals were carried out. The doped LAT crystal is found to have efficiency higher than that of pure LAT crystal.

scholarly journals Characterization Of Microstructure And Selected Properties of SnSbCu Alloy After FSP

2021 ◽  
Author(s):  
Joanna Hrabia-Wiśnios ◽  
Beata Leszczyńska-Madej ◽  
Marcin Madej ◽  
Aleksandra Węglowska
Keyword(s):  
Flexural Strength ◽  
Diffraction Method ◽  
Compression Tests ◽  
X Ray Diffraction ◽  
Linear Speed ◽  
X Ray ◽  
Friction Stir ◽  
Before And After ◽  
Bearing Alloy

Abstract The paper presents the results of research on the microstructure and selected mechanical properties of the SnSbCu bearing alloy after friction stir processing (FSP). The Whorl tool was used for modification; the process was carried out using two rotational speeds of the tool: 280 and 450 RPM and a constant linear speed of 355 mm/min. Microstructure studies were performed employing the techniques of light microscopy and scanning electron microscopy along with analysis of the chemical composition of micro-areas. Additionally, the phase composition was investigated by means of the X-ray diffraction method and statistical analysis of the precipitates present in the investigated alloy. In addition, hardness, flexural strength and uniaxial compression tests were performed before and after FSP modification. It was proved that using FSP to modify the SnSbCu alloy promotes refinement and homogenization of the microstructure, as well as improvement of the flexural strength, whereas no changes in the hardness level were found.

scholarly journals Synthesis Growth and Characterization of Mn doped La1.8Sr0.20CuO4

2011 ◽  
Vol 8 (1) ◽  
pp. 97-100
Author(s):  
Manish Verma ◽  
N. P. Lalla ◽  
D. M. Phase ◽  
V. K. Ahire
Keyword(s):  
Electron Microscopy ◽  
Solid State Reaction Method ◽  
X Ray Diffraction ◽  
Phase Purity ◽  
Reaction Method ◽  
X Ray ◽  
Temperature Method ◽  
Mn Doped ◽  
Scanning Electron

Polycrystalline samples of La1.8Sr0.20Cu1-yMnyO4 (0≤y≤0.15) were synthesized by solid state reaction method. The phase purity was confirmed by powder X-ray diffraction. The scanning electron microscopy was done on the La1.8Sr0.20Cu1-yMnyO4 (0≤y≤0.15) samples. The superconductivity and Transition temperature were studied by four probe resistivity temperature method. The transition temperatures were measured nearly 37 k and were unchanged on Mn doping at Cu site in La1.8Sr0.20CuO4.

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