scholarly journals Investigation of Structural, Mechanical, Thermal and Optical Properties of Cu Doped TiO2

2021 ◽  
Vol 19 (48) ◽  
pp. 1-9
Author(s):  
Muna M. Abbas ◽  
Mohammed RASHEED
Keyword(s):  
Titanium Dioxide ◽  
Dopant Concentration ◽  
Weight Fraction ◽  
Optical Microscope ◽  
Solid State Method ◽  
X Ray ◽  
Nano Powder ◽  
Morphological Studies ◽  
Test Instrument ◽  
Electronic Microscope

In this work, Pure and Cu: doped titanium dioxide nano-powder was prepared through a solid-state method. the dopant concentration [Cu/TiO2 in atomic percentage (wt%)] is derived from 0 to 7 wt.%. structural properties of the samples performed with XRD revealed all nanopowders are of titanium dioxide having polycrystalline nature. Physical and Morphological studies were conducted using a scanning electronic microscope SEM test instrument to confirm the grain size and texture. The other properties of samples were examined using an optical microscope, Lee's Disc, Shore D hardness instrument, Fourier-transform infrared spectroscopy (FTIR), and Energy-dispersive X-ray spectroscopy (EDX). Results showed that the thermal conductivity increased with the weight fraction of the Cu element increasing.

scholarly journals Solid State Reaction Synthesis and Characterization of Aluminum Doped Titanium Dioxide Nanomaterials

2020 ◽  
Vol 55 (2) ◽  
Author(s):  
Muna Muzahim Abbas ◽  
Mohammed Rasheed
Keyword(s):  
Titanium Dioxide ◽  
Solid State ◽  
Titanium Dioxide Nanoparticles ◽  
Weight Fraction ◽  
Optical Microscope ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
X Ray ◽  
Doped Titanium Dioxide ◽  
Diffraction Patterns

In this paper, aluminum doped titanium dioxide nanopowder with doping concentration of different weights were successfully prepared with a simple technique: the classic ceramic technique (or solid-state method). This technique permits the acquiring of powders as pellets with a small amount of the material. The best conditions for the prepared pellets are obtained. Titanium dioxide nanoparticles are mixed with different amounts of aluminum concentrations (0%, 3%, 5%, and 7%). The powders were then mixed and consolidated into pellets and sintered using a conventional furnace at 1100oC. The mechanical, thermal, structural, morphological (including roughness of the samples’ surfaces), and optical properties for those as-prepared samples are demonstrated by: Shore D hardness instrument, roughness test Instrument, Lee's Disc, X-ray diffraction, optical microscope, scanning electronic microscope, energy-dispersive X-ray spectroscopy and Fourier-transform infrared spectroscopy, respectively. The effect of aluminum doped concentrations on the characteristics of titanium dioxide nanoparticles depending on the above instruments are studied. The X-ray diffraction patterns appear to the crystallinity of these materials with a grain size between 20 nm and 30 nm. A roughness measurement indicates that the value of titanium dioxide nanoparticles decreases with the addition of aluminum weights according to the results of the hardness of the samples. Moreover, the results showed that the thermal conductivity increased with the increasing weight fraction of aluminum material. The main goal of the present paper is to investigate the annealing temperature-dependent behavior of the broadening parameter and the characteristics of aluminum doped titanium dioxide nanoparticles.

Effect of Strain to the Microstructure and Texture of AZ31 Magnesium Alloy during Compression Deformation at Room Temperature

2014 ◽  
Vol 893 ◽  
pp. 387-391
Author(s):  
Shan Jiang ◽  
Bin Zeng ◽  
Lyes Douadji
Keyword(s):  
Magnesium Alloy ◽  
Room Temperature ◽  
Optical Microscope ◽  
Az31 Magnesium Alloy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Compression Direction ◽  
Different Strains ◽  
Strain Increase ◽  
Electronic Microscope

AZ31 magnesium alloy samples were compressed to different strains at room temperature and examined through the optical microscope, X-ray diffraction (XRD) and scanning electronic microscope. The results show that the produced twins were mainly the {102} type, and then the {101} type and {102}-{101} type. The size and amount of the twins increased with the strains growth, and after the saturation of twins in the grains the samples fractured. The compressed texture with the basal planes perpendicular to the compression direction also become stronger with strain increase. The {102} twinning deformation played an important role in changing the microstructure and properties of the magnesium alloy at room temperature.

The Preparation of TiO2 Nanoparticles and Wastewater in Paper Mill Treatment with TiO2 Nanoparticles

2011 ◽  
Vol 304 ◽  
pp. 224-228
Author(s):  
Yan Zhu ◽  
Shuai Yuan ◽  
Tao Lu ◽  
Hao Meng
Keyword(s):  
Titanium Dioxide ◽  
Uniform Distribution ◽  
Paper Mill ◽  
Deionized Water ◽  
X Ray Diffraction ◽  
Muffle Furnace ◽  
X Ray ◽  
Suspended Substance ◽  
Nano Titanium Dioxide ◽  
Electronic Microscope

Nano titanium dioxide particles were synthesized by drolysis of TiCl4 through the phase thransfer and pH of the system is adjusted by Na2CO3 At the same time, the particles were characterized by the Transmission Electronic Microscope(TEM) and X-Ray Diffraction(XRD).As the result, it is shown that the TiCl4 solution was transformed from n-octyl alcohol to deionized water phase and reacted with the deionized water at 55°C, the precursors of nano-TiO2—Ti(OH)4 was dried for 6 hours under vacuum at 70°C,then calcined 3 hours in muffle furnace at 400°C.At last, the TiO2 nanoparticles which is uniform distribution, weak agglomeration was synthesized. In addition, wastewater in paper mill treatment with TiO2 nanoparticles was studied by experiment. It is shown that suspended substance and COD in wastewater were brought dwon largely. The mechenism that wastewater was treated is disscussed.

scholarly journals Mineralogical and morphological studies of gold-bearing arsenopyrite and pyrite minerals of Bakyrchik and Bolshevik gold black shale deposits (Eastern Kazakhstan)

2018 ◽  
Vol 7 (2) ◽  
pp. 153-165
Author(s):  
Medet Junussov ◽  
Zamzagul Umarbekova
Keyword(s):  
Analytical Study ◽  
Optical Microscope ◽  
Gold Deposits ◽  
X Ray Diffraction ◽  
X Ray ◽  
Morphological Studies ◽  
Metallogenic Zone ◽  
Eastern Kazakhstan ◽  
Gold Bearing

Abstract Bakyrchik and Bolshevik both are sediment-hosted disseminated gold deposits. They are located in Eastern Kazakhstan (4 km in distance between deposits) and include in the Western Qalba metallogenic zone. They originated in late Paleozoic age along structured line between palaeocontinents of Kazakhstan and Altai-Mongol. The purpose of this paper is designation of typomorphic features of gold-bearing arsenopyrite and pyrite minerals, determination of chemical composition of these two sulfides minerals. The arsenopyrite and pyrite are the main objects for analytical study of gold-bearing sulfide minerals, their different textures, morphology of the crystals and aggregates. The studies of ore samples and minerals were carried out by methods of optical microscope, X-ray diffraction, X-ray fluorescence and electron microprobe analyses. The analytical study of sulphide minerals has shown that the arsenopyrite is acicular and tabular, pyrite has three varieties - globular, hexahedral and pentahedral forms in three rock samples of the carbonaceous-terrigenous formation in the deposits.

scholarly journals Investigation of Microstructure and Creep Properties of Sn-xSb Solder Alloys up to Peritectic Composition

2018 ◽  
Vol 15 ◽  
pp. 5970-5982
Author(s):  
Amal Mohamed Yassin ◽  
Berlent Khalifa ◽  
Reda Ismail
Keyword(s):  
Tensile Deformation ◽  
Optical Microscope ◽  
X Ray Diffraction ◽  
Creep Properties ◽  
X Ray ◽  
Microstructure Characteristics ◽  
Morphological Studies ◽  
Tensile Deformation Behavior ◽  
Dominant Deformation Mechanism ◽  
Particle Strengthening

Particle strengthening was studied in Sn-xSb (x=0.5–3.0 wt. %). Tensile deformation behavior of Sn-2.5 wt.% Sb is investigated at temperature ranging (298 - 343K) and under different constant loads ranging (5.1 - 14.0 MPa). The microstructure characteristics of the tested alloys have been obtained using x-ray diffraction. Morphological studies using optical microscope have been investigated to obtain correlation between the microstructure and mechanical behavior of the alloys. The improved strength is attributed to the uniform distribution of the SnSb intermetallic compound (IMC) inside b-Sn matrix. Based on the obtained stress exponent (n) and activation energy (Q), it is proposed that the dominant deformation mechanism is dislocation climb over the whole temperature range used.

scholarly journals Investigation of the enrichment process of waste titanium production

1970 ◽  
Author(s):  
Sergey V. Lanowiecki ◽  
Olga G. Melkomkova ◽  
Semen G. Khudyakov
Keyword(s):  
Titanium Dioxide ◽  
Magnetic Separation ◽  
Large Fraction ◽  
Digital Camera ◽  
Optical Microscope ◽  
Considerable Proportion ◽  
Magnetic Fraction ◽  
X Ray ◽  
Ilmenite Concentrate ◽  
Enrichment Process

The paper presents a study of the process of enriching the waste of titanium production (sand and slag mixture) by mechanical and magnetic separation methods in order to reduce the losses of the useful component in the technology of processing ilmenite concentrate. The composition of the initial fraction of the test mixture and fractions obtained in the process of mechanical and magnetic separation was evaluated using X-ray and X-ray spectral analyzes. The particle size of the analyzed mixture was evaluated by means of a high-resolution scanning electron microscope «S-3400N» and an optical microscope «MBS-1» from a digital camera Webbers MYscope 560MCCD. As a result of the separation of the analyzed mixture by mechanical classification, it was shown that the fraction 0.16 ‑ 0.4 mm contains a considerable proportion of sand (up to 94%) and can be completely removed from the technology without further processing. The remaining fractions in addition to titanium dioxide, iron and its oxides contain a sufficiently large fraction of silicon dioxide, which can not be separated by the screen classification method. Studies on the separation of the analyzed mixture by the magnetic separation method have shown that it is possible to separate out phases of sand and titanium dioxide without iron impurities into the nonmagnetic fraction. At the same time, virtually all iron with its trivalent oxide remains in the magnetic part, as well as a sufficiently large fraction of silica and titanium particles, fused in larger pieces of the magnetic fraction. It is shown that in the process of magnetic separation, up to 100% of Fe + Fe2O3, 20% of SiO2 and 73% of TiO2 are transferred to the magnetic fraction. At the same time, with a non-magnetic fraction, on average, up to 80% of SiO2 and 27% of TiO2 are consumed.

Influence of RE on Microstructure and Mechanical Properties of Mg-Li-Al Alloys

2007 ◽  
Vol 546-549 ◽  
pp. 211-216 ◽  
Author(s):  
Bin Liu ◽  
M.L. Zhang ◽  
Zhong Yi Niu
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Melting Furnace ◽  
Optical Microscope ◽  
Al Alloys ◽  
X Ray Diffraction ◽  
Vacuum Melting ◽  
X Ray ◽  
Electronic Microscope ◽  
Cast Microstructure

A series of alloys were designed and prepared using vacuum melting furnace. The as-cast microstructure and phase compositions of these alloys were characterized by optical microscope, X-ray diffraction (XRD) and scanning electronic microscope (SEM). The hardness and mechanical properties of alloys at room temperature were measured as well. The results show that the addition of RE leads to the formation of intermetallic Al3La distributed within grain boundaries. The intermetallic compound with oriented structure impedes grain growth, and refines the grain. The strength and the hardness of the alloys increase with the increase of the RE content in the range of 0.2-0.8 wt %.

scholarly journals Wavelength Dependent Anisotropic Photo Sensing Activity of Zirconium Trisulfide Crystal

2021 ◽  
Author(s):  
Anand Chunilal Patel ◽  
Kunjal Patel ◽  
Chaitanya Limberkar ◽  
K. D. Patel ◽  
G. K. Solanki ◽  
...  
Keyword(s):  
Optical Microscope ◽  
Vapour Transport ◽  
Bulk Crystals ◽  
Energy Dispersive Analysis ◽  
X Ray ◽  
Performance Requirements ◽  
Morphological Studies ◽  
Different Types ◽  
Device Applications ◽  
Photo Response

Abstract According to the performance requirements, either bulk or nanocrystalline form of the material can be used for different types of device applications. In the present study, zirconium triselenide bulk crystals were grown by direct vapour transport technique. The as-grown crystals and powder have been examined under Carl Zeiss optical microscope and scanning electron microscope for morphological studies which revealed the evolution of crystalline phases of the material by the layered kind of growth mechanism. The energy dispersive analysis of X-ray (EDAX) characterization confirms that no impurity is found in the resulting product except the desired material. To study the effect of different wavelength sources (Blue-470 nm, Green-540 nm, Red-670 nm) on bulk zirconium trisulfide photodetectors, pulsed photo response experiment was carried out. The anisotropic behaviour is also revealed using the same sources. Various device parameters like responsivity, sensitivity, detectivity and external quantum efficiency (EQE%) were calculated. The highest responsivity and detectivity of 81.7 µA/W and 3.56 × 1007 Jones were achieved for blue (470 nm) light source respectively.

X-ray microanalysis of thin specimens in the transmission electron microscope at voltages up to 1000 Kv.

1978 ◽  
Vol 36 (1) ◽  
pp. 540-541
Author(s):  
G. Cliff ◽  
M.J. Nasir ◽  
G.W. Lorimer ◽  
N. Ridley
Keyword(s):  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Weight Fraction ◽  
Present Series ◽  
Constant Independent ◽  
X Ray ◽  
Transmission Electron ◽  
Series Of Experiments ◽  
Image Position ◽  
X Ray Absorption

In a specimen which is transmission thin to 100 kV electrons - a sample in which X-ray absorption is so insignificant that it can be neglected and where fluorescence effects can generally be ignored (1,2) - a ratio of characteristic X-ray intensities, I1/I2 can be converted into a weight fraction ratio, C1/C2, using the equationwhere k12 is, at a given voltage, a constant independent of composition or thickness, k12 values can be determined experimentally from thin standards (3) or calculated (4,6). Both experimental and calculated k12 values have been obtained for K(11<Z>19),kα(Z>19) and some Lα radiation (3,6) at 100 kV. The object of the present series of experiments was to experimentally determine k12 values at voltages between 200 and 1000 kV and to compare these with calculated values.The experiments were carried out on an AEI-EM7 HVEM fitted with an energy dispersive X-ray detector.

scholarly journals Characterization of a Mahamayuri Vidyarajni Sutra excavated in Lu’an, China

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Liu Liu ◽  
Decai Gong ◽  
Zhengquan Yao ◽  
Liangjie Xu ◽  
Zhanyun Zhu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tang Dynasty ◽  
Optical Microscope ◽  
Lead White ◽  
Scientific Methods ◽  
X Ray ◽  
Micro Raman Spectroscopy ◽  
Scanning Electron

Abstract Historically, sutras played an important role in spreading Buddhist faith and doctrine, and today these remain important records of Buddhist thought and culture. A Mahamayuri Vidyarajni Sutra with polychrome paintings was found inside the cavity on top of the Nanmen Buddhist pagoda, built in the early Tang dynasty (618–627 CE) and located in Anhui Province, China. Textile was found on the preface which is strongly degraded and fragile. Unfortunately, the whole sutra is under severe degradation and is incomplete. Technical analysis based on scientific methods will benefits the conservation of the sutra. Optical microscopy (OM), micro-Raman spectroscopy combined with optical microscope (Raman), scanning electron microscopy in combination with energy dispersive X-ray analysis (SEM–EDS) and Fourier Transform Infrared Spectroscopy (FTIR) were used to characterize the pigment and gilded material, as well as the paper fiber and textile. Pigments such as cinnabar, minium, paratacamite, azurite, lead white were found. Gilded material was identified as gold. A five-heddle warp satin, made of silk, was found as the textile on the preface of the sutra. The sutra’s preface and inner pages were made of paper comprised of bamboo and bark. As a magnificent yet recondite treasure of Buddhism, the sutra was analyzed for a better understanding of the material. A conservation project of the sutra will be scheduled accordingly.

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