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Online since: June 2019
Authors: Abdelaziz Drici, Amina Laskri, Amor Boulouma, Abdelaziz Amara, Jean Christian Bernede
X-ray diffraction showed that the films have a monoclinic structure with a preferential orientation along the (031) direction.
These oxides have different crystalline structures leading to a variety of physiochemical, electrochemical, electronic, and optical properties.
In the Ag3O4 monoclinic structure, the plane spacing is related to the lattice constants a, b, c, by the following equation: dhkl=1h2a2+l2c2-2hlaccosβ1sin2β+k2b2 (2) Fig.1.
McMillan Magnetic properties and crystalline structure of AgO, Journal of Inorganic and Nuclear Chemistry, Volume 13, Issues 1–2, April 1960, Pages 28-31 [3] B.
El-Nahass, Study of structure and electro-optical characteristics of indium tin oxide thin films, Advances in Condensed Matter Physics 2013 (2013) 408182-408189
These oxides have different crystalline structures leading to a variety of physiochemical, electrochemical, electronic, and optical properties.
In the Ag3O4 monoclinic structure, the plane spacing is related to the lattice constants a, b, c, by the following equation: dhkl=1h2a2+l2c2-2hlaccosβ1sin2β+k2b2 (2) Fig.1.
McMillan Magnetic properties and crystalline structure of AgO, Journal of Inorganic and Nuclear Chemistry, Volume 13, Issues 1–2, April 1960, Pages 28-31 [3] B.
El-Nahass, Study of structure and electro-optical characteristics of indium tin oxide thin films, Advances in Condensed Matter Physics 2013 (2013) 408182-408189
Online since: August 2011
Authors: Fei Sun, Jian Xin Zhang
There is no octahedral interstice, only tetrahedral interstice in crystallographic structures of TCP phases[3-5].
Although the chemistries of the TCP phases are dependent upon the composition of the parent alloy, some common phases can be distinguished by their distinct crystallographic structures (Table 1).
The unit cell contains 30 atoms with coordination number as high as 15, which structure is familiar with that of M23C6.
The structure of μ phase belongs to rhombohedral system.
The unit cell contains 39 atoms with complicated structure.
Although the chemistries of the TCP phases are dependent upon the composition of the parent alloy, some common phases can be distinguished by their distinct crystallographic structures (Table 1).
The unit cell contains 30 atoms with coordination number as high as 15, which structure is familiar with that of M23C6.
The structure of μ phase belongs to rhombohedral system.
The unit cell contains 39 atoms with complicated structure.
Online since: October 2002
Authors: Jindřich Musil, J. Vlček, F. Regent, F. Kunc, H. Zeman
They are composed of at least two separated phases
with a nanocrystalline and/or amorphous structure.
The structure of alloy films depends on the amount and type of elements added to the base, one element material.
This means that not all combinations of different elements form automatically nanocrystalline structure.
Superhard films with the same value of H can, however, exhibit a very different structure.
R16(1996), 161 [6] J.Musil and J.VlNek: Materials Chemistry and Physics 54(1998), 116 [7] S.Veprek: J.Vac.Sci.Technol.
The structure of alloy films depends on the amount and type of elements added to the base, one element material.
This means that not all combinations of different elements form automatically nanocrystalline structure.
Superhard films with the same value of H can, however, exhibit a very different structure.
R16(1996), 161 [6] J.Musil and J.VlNek: Materials Chemistry and Physics 54(1998), 116 [7] S.Veprek: J.Vac.Sci.Technol.
Online since: June 2022
Authors: Ehsan Omaraa, Ali A. Mnati, Kadhim K. Resan
The structure of ductile iron is formed from the cast iron melt.
The chemistry of all the materials used was obtained from the manufacture’s analysis, State Company for Steel Industries and The General Iron and Steel Company of Basra, at the conditions of 24°C and 20% humidity, as shown in Table 3.
The structure of product sample B also contains graphite spheroids in a matrix of pearlite with few ferrites, in accordance with (Robert F.
The count of spheroids and the evolved structures nodularity are the virtuous pointers of the good mechanical characteristics in the ductile irons, in accordance with (Z.
The value of Brinell hardness was found to rise by raising the content of the pearlite of the structure of the matrix of the investigated current alloy.
The chemistry of all the materials used was obtained from the manufacture’s analysis, State Company for Steel Industries and The General Iron and Steel Company of Basra, at the conditions of 24°C and 20% humidity, as shown in Table 3.
The structure of product sample B also contains graphite spheroids in a matrix of pearlite with few ferrites, in accordance with (Robert F.
The count of spheroids and the evolved structures nodularity are the virtuous pointers of the good mechanical characteristics in the ductile irons, in accordance with (Z.
The value of Brinell hardness was found to rise by raising the content of the pearlite of the structure of the matrix of the investigated current alloy.
Online since: May 2018
Authors: Mauricio Pacio, Héctor Juárez, Abraham Pacio, José Alberto Alvarado, Cesia Guarneros, Rene Pérez-Cuapio, Carlos Bueno
The ZnO films deposited showed diffraction peaks corresponding to the hexagonal wurtzite structure.
The relationship between d-spacing and lattice parameters for a hexagonal structure is given by [8]: 1d2=43h2+hk+k2a2+l2c2
The average dimensions of the pores and the thickness of the skeleton depend upon the structure that exists at the gel point and the extent of the collapse or distortion of this structure that results from the drying [29].
XRD patterns showed that the ZnO films exhibited a hexagonal wurtzite structure with a c-axis preferred orientation.
Scherer, Sol-Gel Science, The physics and chemistry of sol-gel processing, Academic Press Inc., San Diego CA. (1990) pp 453-477
The relationship between d-spacing and lattice parameters for a hexagonal structure is given by [8]: 1d2=43h2+hk+k2a2+l2c2
The average dimensions of the pores and the thickness of the skeleton depend upon the structure that exists at the gel point and the extent of the collapse or distortion of this structure that results from the drying [29].
XRD patterns showed that the ZnO films exhibited a hexagonal wurtzite structure with a c-axis preferred orientation.
Scherer, Sol-Gel Science, The physics and chemistry of sol-gel processing, Academic Press Inc., San Diego CA. (1990) pp 453-477
Online since: May 2016
Authors: Evangelos Hristoforou, E.D. Metaxa, K. Berkesi, D. Musmarra, Athanasios G. Mamalis
These units are interlinked by α-1,4glycosidic bonds which results in its cyclic structure.
Fig. 1b Chemical structure of β-cyclodextrin [10-12].
Moreover, the sharpness of these peaks is attributed to the good arrangement as well as to the long-chain hydrocarbon structure of oleic acid [25].
Hofmann, Nanoparticles: structure, properties, preparation and behaviour in environmental media, Ecotoxicology 17 (2008) 326
Szejtli, Introduction and general overview of cyclodextrin chemistry, Chem.
Fig. 1b Chemical structure of β-cyclodextrin [10-12].
Moreover, the sharpness of these peaks is attributed to the good arrangement as well as to the long-chain hydrocarbon structure of oleic acid [25].
Hofmann, Nanoparticles: structure, properties, preparation and behaviour in environmental media, Ecotoxicology 17 (2008) 326
Szejtli, Introduction and general overview of cyclodextrin chemistry, Chem.
Online since: April 2009
Authors: Mark T. Smith, Philip S. Sklad, Joseph A. Carpenter, Dean M. Paxton
Mass compounding means that, in addition to the fuel economy increase due to the direct loss of
weight by the given component or structure, other mass may be shed elsewhere in other vehicle
components or structures such as the powertrain, the suspension and the braking.
The purpose of the project is the concurrent development of key enabling materials and manufacturing technologies and the accompanying performance knowledge base to permit design and implementation of Mg-intensive automotive body front-end structures having greatly reduced mass, but with performance and cost comparable to sheet-steel baseline structures.
The development of a fine grain microstructure that remains stable at SPF temperatures generally requires a combination of alloy chemistry adjustment together with combinations of hot and cold rolling into sheet.
This is a direct result of the hexagonal close-packed (hcp) structure of Mg that requires the sheet to be rolled in small increments, often with annealing steps between rolling passes.
L., Twarog, D. and Daniels, E.J. (1991) "The Effect of Trace Amounts of Antimony on the Structure and Properties of Aluminum Alloy A356.2," Transactions of the American Foundrymen's Society.
The purpose of the project is the concurrent development of key enabling materials and manufacturing technologies and the accompanying performance knowledge base to permit design and implementation of Mg-intensive automotive body front-end structures having greatly reduced mass, but with performance and cost comparable to sheet-steel baseline structures.
The development of a fine grain microstructure that remains stable at SPF temperatures generally requires a combination of alloy chemistry adjustment together with combinations of hot and cold rolling into sheet.
This is a direct result of the hexagonal close-packed (hcp) structure of Mg that requires the sheet to be rolled in small increments, often with annealing steps between rolling passes.
L., Twarog, D. and Daniels, E.J. (1991) "The Effect of Trace Amounts of Antimony on the Structure and Properties of Aluminum Alloy A356.2," Transactions of the American Foundrymen's Society.
Online since: August 2019
Authors: Mohamed Samuel Moriah Conté, Abdellah Boushaba, Ali Moukadiri
It is made up of porous parts with the structure of intercrossed fibers or roots (Table 3, result 5).
Analysis of this structure gave a high peak of carbon (C) followed by iron (Fe) and oxygen (O2) (Fig. 35a).
This structure seems to represent siderite (Fig. 35b).
Fig. 38 Magnetite (Mag) with strike structures (seen in polished section).
Haskin, An accurate procedure for the determination of the rare earths by neutron activation, Journal of Radioanalytical Chemistry, 1, 1968, pp.337-348
Analysis of this structure gave a high peak of carbon (C) followed by iron (Fe) and oxygen (O2) (Fig. 35a).
This structure seems to represent siderite (Fig. 35b).
Fig. 38 Magnetite (Mag) with strike structures (seen in polished section).
Haskin, An accurate procedure for the determination of the rare earths by neutron activation, Journal of Radioanalytical Chemistry, 1, 1968, pp.337-348
Online since: December 2023
Authors: Abd Elouahab Noua, Khedidja Chehhat, Dogan Kaya, Imed Eddine Zerrouk, Ahmet Ekicibil, Dhikra Bouras, Lazhar Foughali, Abla Mecif
Structural analysis of the X-ray diffraction spectra revealed a hexagonal wurtzite structure for ZnO and mullite/cristoballite structures for substrates.
The crystalline structures of the samples were determined by ARL.
The XRD spectrum of the ZnO film revealed a polycrystalline hexagonal wurtzite structure (JCPDF card no. 36-1451) [41].
Chemistry, Effect of glass substrate and deposition technique on the properties of sol gel TiO2 thin films, J.
Liu, Low-temperature synthesis of highly porous whisker-structured mullite ceramic from kaolin, Ceram.
The crystalline structures of the samples were determined by ARL.
The XRD spectrum of the ZnO film revealed a polycrystalline hexagonal wurtzite structure (JCPDF card no. 36-1451) [41].
Chemistry, Effect of glass substrate and deposition technique on the properties of sol gel TiO2 thin films, J.
Liu, Low-temperature synthesis of highly porous whisker-structured mullite ceramic from kaolin, Ceram.
Online since: January 2012
Authors: Mikael Syväjärvi, Rositza Yakimova, Remigijus Vasiliauskas, Jens Eriksson
Initial stage of 3C formation and structure evolution.
Besides the development of superior MOSFETs, the heteropolytype structure 3C/6H(4H) holds a high potential for novel devices.
Understanding structure evolution is crucial to obtain low defect density material.
It is shown that in device structures SFs are electrically active but they can be passivated by UV light.
Reza Yazdi, Nut Sritirawisarn, and Mikael Syväjärvi, Structure Evolution of 3C-SiC on Cubic and Hexagonal Substrates, Mater.
Besides the development of superior MOSFETs, the heteropolytype structure 3C/6H(4H) holds a high potential for novel devices.
Understanding structure evolution is crucial to obtain low defect density material.
It is shown that in device structures SFs are electrically active but they can be passivated by UV light.
Reza Yazdi, Nut Sritirawisarn, and Mikael Syväjärvi, Structure Evolution of 3C-SiC on Cubic and Hexagonal Substrates, Mater.