Development of a hybrid metal-oxides (Li2O-Al2O3-Al3Fe-Al3Fe5O12) reinforced polycaprolactone composite

MRS Advances ◽  
2019 ◽  
Vol 4 (63) ◽  
pp. 3485-3493
Author(s):  
N.N. Zurita-Méndez ◽  
J. Beltran-González ◽  
G. Carbajal-De la Torre ◽  
M.A. Espinosa-Medina
Keyword(s):  
Lithium Aluminum Hydride ◽  
Polymer Network ◽  
Aluminum Hydride ◽  
Lithium Aluminum ◽  
X Ray Diffraction ◽  
X Ray ◽  
Potential Applications ◽  
Nanometric Particles ◽  
Irregular Topography

ABSTRACTThis paper addresses the chemical synthesis and characterization of a composite formed by Li2O-Al2O3-Al3Fe-Al3Fe5O12/PCL which were obtained by the process of reduction of ferric chloride (FeCl3) with lithium aluminum hydride (LiAlH4) in an open atmosphere. The goal of the development of this hybrid material was to perform a superparamagnetic material with several potential applications. The results of the characterizations by scanning electron microscopy (SEM) and vibrating sample magnetometer showed a Li2O-Al2O3-Al3Fe-Al3Fe5O12 “desert rose stone”-like morphology 3D hierarchical powders formation when particles were sintered at 850 °C. Homogeneous nanometric particles after calcination at 1100 °C were observed. X-ray diffraction analysis were performed to determine their composition. Subsequently, the superparamagnetic powders were added by dispersion in a polycaprolactone (PCL) matrix, and then, were evaluated by SEM for the observation of their morphologies. The composite material presented a polymer network with an opened structure, a well dispersion of the oxides particles into the interstices with irregular topography and reliefs.

Synthesis of β-amino-α-ferrocenyl alcohols

2005 ◽  
Vol 2005 (11) ◽  
pp. 712-715 ◽  
Author(s):  
Hai-Ying Zhao ◽  
Zhan-Xi Bian ◽  
Bao-Guo Li
Keyword(s):  
Lithium Aluminum Hydride ◽  
Aluminum Hydride ◽  
Chain Structure ◽  
Lithium Aluminum ◽  
Polymeric Chain ◽  
X Ray ◽  
H Nmr ◽  
Hydrogen Bonding Interactions ◽  
Trimethylsilyl Ethers ◽  
New Compounds

β-Amino-α-ferrocenyl alcohols [FcC(OH)(R)CH2NH2] (R = Me, Et, nPr, iPr, Ph, p-MeOC6H4, o-ClC6H4, m-ClC6H4, p-ClC6H4, Fc; Fc = C5H4FeC5H5) were prepared by the reduction of cyanohydrin trimethylsilyl ethers of acylferrocenes with lithium aluminum hydride. All new compounds were characterised by elemental analysis, IR and 1H NMR spectroscopies. The X-ray crystal structure of β-amino-α,α-diferrocenylethanol shows that it has a polymeric chain structure with hydrogen bonding interactions between the OH proton and the N of NH2.

Photorearrangement of 2-cyanobicyclo[2.2.1]hept-2-ene. Observation of 1,2- and 1,3-sigmatropic shifts

1982 ◽  
Vol 60 (13) ◽  
pp. 1657-1663 ◽  
Author(s):  
Ikbal A. Akhtar ◽  
John J. McCullough ◽  
Susan Vaitekunas ◽  
Romolo Faggiani ◽  
Colin J. L. Lock
Keyword(s):  
Single Crystals ◽  
Lithium Aluminum Hydride ◽  
Aluminum Hydride ◽  
Major Product ◽  
Molecular Structures ◽  
Lithium Aluminum ◽  
Mercury Vapour ◽  
X Ray ◽  
Crystal And Molecular Structures ◽  
Mercury Vapour Lamp

Irradiation of 2-cyanobicyclo[2.2.1]hept-2-ene (2-cyanonorbornene, 4) in hexane, with the full arc of a mercury vapour lamp, gives the rearrangement products 1-cyanobicyclo[4.1.0]hept-2-ene 5 and 7-cyanotricyclo[4.1.0.03.7]heptane 6 in the ratio 20:1. These products were separated by preparative vpc. The structure of the major product 5 was determined by single crystal X-ray analysis. Reduction of 5 with lithium aluminum hydride gave the corresponding primary amine, which was converted to the p-bromobenzenesulfonamide 9, mp 150–151 °C, which gave single crystals from ethanol–water. The crystal and molecular structures are described. The minor product 6 was hydrogenated to give 7-cyanobicyclo[2.2. 1]heptane. Formation of 5 and 6 may involve concerted σ2s + π2s and σ2a + π2a processes respectively, which are photochemically allowed.

Synthesis and Characterization of Copper-Iron Nitride Thin Films

MRS Advances ◽  
2015 ◽  
Vol 1 (3) ◽  
pp. 203-208 ◽  
Author(s):  
Hrishikesh Kamat ◽  
Xingwu Wang ◽  
James Parry ◽  
Yueling Qin ◽  
Hao Zeng
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Iron Nitride ◽  
X Ray Diffraction ◽  
Copper Nitride ◽  
X Ray ◽  
Structure Morphology ◽  
Layer Stacking ◽  
Potential Applications

ABSTRACTIron nitride thin films have potential applications in the biomedicine and energy. The magnetic properties of these films can be tuned by incorporating copper nitride. In this study, iron copper nitride thin films have been fabricated by magnetron sputtering technique either by co-sputtering iron nitride and copper nitride or by layer stacking of the materials. The structure, morphology and magnetic properties of the films have been studied by scanning electron microscopy, x-ray diffraction, x-ray reflectivity and vibrating sample magnetometry.

scholarly journals Preparation and Characterization of Few Layered MoS2 Nano Flakes

2019 ◽  
Vol 8 (2S3) ◽  
pp. 146-148
Keyword(s):  
Layered Materials ◽  
Transition Metal Dichalcogenide ◽  
Two Dimensional ◽  
Thermal And Mechanical Properties ◽  
X Ray Diffraction ◽  
Molybdenum Disulphide ◽  
X Ray ◽  
Potential Applications ◽  
Layered Mos2

Two dimensional layered materials have become a prominent area of current research and development due to the significant properties exhibited by them. Exploiting graphene's layered structure have led to the property enhancement and thereby making it a good candidate for potential applications. MoS2 (Molybdenum disulphide), a transition metal dichalcogenide possess exceptional electrical, thermal and mechanical properties which can be well exploited on exfoliation. The present work report the exfoliation of pristine MoS2. The layers of pristine MoS2 are held together by weak van der Waals interaction, which is disturbed by the addition of a suitable modifier facilitating the exfoliation process. The modifier treated MoS2 is elucidated by powder X-ray diffraction, Photoluminesence and Raman spectroscopy

Characterization of a system that combines energy dispersive X-ray diffraction with X-ray fluorescence and its potential applications in archeometry

2019 ◽  
Vol 126 (4) ◽  
pp. 044901 ◽  
Author(s):  
Hellen C. Santos ◽  
Tiago F. Silva ◽  
Alisson R. Leite ◽  
Renan F. Assis ◽  
Pedro H. O. V. Campos ◽  
...  
Keyword(s):  
Energy Dispersive ◽  
X Ray Diffraction ◽  
X Ray ◽  
Potential Applications

Characterization of kaolin from Mankon, northwest Cameroon

Clay Minerals ◽  
2018 ◽  
Vol 53 (4) ◽  
pp. 563-577 ◽  
Author(s):  
A. Nzeukou Nzeugang ◽  
M. El Ouahabi ◽  
B. Aziwo ◽  
J.R. Mache ◽  
H.S. Mefire Mounton ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Raw Materials ◽  
Clay Fraction ◽  
Mineralogical Composition ◽  
X Ray Diffraction ◽  
X Ray ◽  
Potential Applications ◽  
Kaolin Deposit ◽  
Scanning Electron

ABSTRACTA kaolin deposit from Mankon (northwest Cameroon) was prospected and studied for potential applications in ceramics. Six samples were investigated with X-ray diffraction (XRD), infrared (IR) spectroscopy and scanning electron microscopy (SEM) to determine the mineralogical composition and with X-ray fluorescence (XRF) to determine the chemical composition and properties for ceramic applications. The main minerals in the clays are kaolinite/halloysite and anatase associated with alunite, illite, gibbsite and maghemite. The kaolin samples have abundant organic matter (4–10%) and low absorption of methylene blue (0.2–2.5 meq/100 g), while SiO2 (33.28–56.31%) and Al2O3 (19.26–35.87%) are major oxides. The particle-size distribution derived from sieving and the hydrometer method indicates that 12–38% of the samples are in the <2 μm clay fraction. The clays have low to moderate plasticity (7–21%). One sample with K-feldspar and plagioclase displays the necessary properties for red ceramic products. SEM confirmed the occurence of halloysite in sample M9. The high kaolinite/halloysite content (64–97%), associated with low Fe2O3 content (0.5–1.4%) demonstrates that five samples are suitable raw materials for white firing industrial kaolin.

scholarly journals Spirolucidine, a new Lycopodium alkaloid

1984 ◽  
Vol 62 (2) ◽  
pp. 298-302 ◽  
Author(s):  
William A. Ayer ◽  
Leslie F. Ball ◽  
Lois M. Browne ◽  
Motoo Tori ◽  
Louis T. J. Delbaere ◽  
...  
Keyword(s):  
Spectroscopic Data ◽  
Lithium Aluminum Hydride ◽  
Aluminum Hydride ◽  
Lithium Aluminum ◽  
X Ray ◽  
Hydride Reduction ◽  
Crystallographic Study ◽  
Lycopodium Alkaloid ◽  
Relative Stereochemistry ◽  
New Type

The structure of spirolucidine, a new type of Lycopodium alkaloid related to the lucidines, has been determined. Chemical and spectroscopic data, together with biogenetic considerations, led to the correct constitution of spirolucidine. An X-ray crystallographic study of tetrahydrodeoxyspirolucidine, the lithium aluminum hydride reduction product of spirolucidine, confirmed the constitution and established the relative stereochemistry of the alkaloid.

The Use of Advanced Analytical Techniques for Characterization of the Chemical, Physical, and Crystallographic Nature of a Surface

1973 ◽  
Vol 31 ◽  
pp. 132-133 ◽  
Author(s):  
R. E. Herfert
Keyword(s):  
Surface Characterization ◽  
Analytical Techniques ◽  
X Ray Diffraction ◽  
Depth Of Penetration ◽  
X Ray ◽  
The Past ◽  
Transmission Electron ◽  
Scanning Electron

Studies of the nature of a surface, either metallic or nonmetallic, in the past, have been limited to the instrumentation available for these measurements. In the past, optical microscopy, replica transmission electron microscopy, electron or X-ray diffraction and optical or X-ray spectroscopy have provided the means of surface characterization. Actually, some of these techniques are not purely surface; the depth of penetration may be a few thousands of an inch. Within the last five years, instrumentation has been made available which now makes it practical for use to study the outer few 100A of layers and characterize it completely from a chemical, physical, and crystallographic standpoint. The scanning electron microscope (SEM) provides a means of viewing the surface of a material in situ to magnifications as high as 250,000X.

High Resolution Replication of Organoclay Surfaces

1982 ◽  
Vol 40 ◽  
pp. 576-577
Author(s):  
W. W. Barker ◽  
W. E. Rigsby ◽  
V. J. Hurst ◽  
W. J. Humphreys
Keyword(s):  
Clay Mineral ◽  
Organic Molecule ◽  
Organic Molecules ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Naturally Occurring ◽  
Silicate Layers ◽  
Mineral Identification

Experimental clay mineral-organic molecule complexes long have been known and some of them have been extensively studied by X-ray diffraction methods. The organic molecules are adsorbed onto the surfaces of the clay minerals, or intercalated between the silicate layers. Natural organo-clays also are widely recognized but generally have not been well characterized. Widely used techniques for clay mineral identification involve treatment of the sample with H2 O2 or other oxidant to destroy any associated organics. This generally simplifies and intensifies the XRD pattern of the clay residue, but helps little with the characterization of the original organoclay. Adequate techniques for the direct observation of synthetic and naturally occurring organoclays are yet to be developed.

Synthesis and characterization of TiN / Ti / AISI 410 coatings

2018 ◽  
Vol 2 (1) ◽  
pp. 7
Author(s):  
S Chirino ◽  
Jaime Diaz ◽  
N Monteblanco ◽  
E Valderrama
Keyword(s):  
Synthesis And Characterization ◽  
Photoemission Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Columnar Grains ◽  
Tin Thin Films ◽  
Steel Aisi ◽  
Interacting Surfaces ◽  
Stainless Steel Aisi

The synthesis and characterization of Ti and TiN thin films of different thicknesses was carried out on a martensitic stainless steel AISI 410 substrate used for tool manufacturing. The mechanical parameters between the interacting surfaces such as thickness, adhesion and hardness were measured. By means of the scanning electron microscope (SEM) the superficial morphology of the Ti/TiN interface was observed, finding that the growth was of columnar grains and by means of EDAX the existence of titanium was verified.  Using X-ray diffraction (XRD) it was possible to observe the presence of residual stresses (~ -3.1 GPa) due to the different crystalline phases in the coating. Under X-ray photoemission spectroscopy (XPS) it was possible to observe the molecular chemical composition of the coating surface, being Ti-N, Ti-N-O and Ti-O the predominant ones.

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