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Online since: March 2015
Authors: Magdalena Popczyk, Grzegorz Dercz, Bożena Łosiewicz
The structure of graphite [13].
The structure of glass-like carbon has long been a subject of discussion.
Cobalt oxide (Co3O4) possesses the spinel structure and is a p-type semiconductor.
Particular role is attributed to mixed metal oxides of spinel and perovskite structures.
Gopalakrishnan: New Directions in Solid State Chemistry, Second Edition, Cambridge University Press, 1997, Cambridge
Online since: July 2019
Authors: M. Staszuk
In the case of WC coatings, a multilayered structure was observed (Fig. 2b).
Substrate II Cr/W exhibits a layered structure with variable concentration of chromium and tungsten (Figs. 3b,f).
The chromium in both sublayers has a crystalline structure (Figs. 4c,d).
This is undoubtedly associated with the structure of the coating material, which shows a nearly amorphous structure (Figs. 2b,4,5).
Sammelselg, Chemical resistance of TiO2 and Al2O3 single-layer and multilayer coatings atomic layer deposited from hydrogen-free precursors on silicon and stainless steel, Materials Chemistry and Physics 228 (2019) 285-292
Online since: March 2008
Authors: Maria Cristina Menziani, Ginaluca Malavasi, Gigliola Lusvardi, Ledi Menabue
A combined experimental-computational strategy for the design, synthesis and characterization of bioactive zinc-silicate glasses Gigliola Lusvardi, Gianluca Malavasi, Ledi Menabue, Maria Cristina Menziani Department of Chemistry, University of Modena and Reggio Emilia, Via G.
Glass structure determination Several methods have been developed for generating models for the structure of amorphous materials at atomic level.
Models of crystalline or random structures are heated at high temperature in order to generate simulated melts which are subsequently quenched, freezing the structure into a disorder glassy phase.
In our studies MD simulations have been performed on input structures made of a 2800 ions, representatives of the studied glass compositions, randomly distributed in a cubic box.
The input structures are cooled down from 5000 to 300 K, decreasing the temperature with steps of 500 K, using the constant volume NVT simulation.
Online since: March 2006
Authors: Yuriy S. Nechaev
It can be noted that FeAl6 structure is very close to structures [28] of MnAl6 and α-CuFe4Al23, and that of FeAl3 is close to Co4Al13.
Hence, the above results are applicable to these structures, as well [29].
Bernal, The structure of liquids, Proc.
Pinskner, The structure of amorphous films, Izv.
Pearson, The crystal chemistry and physics of metals and alloys, New York - London - Sydney - Toronto: Wiley,1977, Part 1. 29.
Online since: November 2025
Authors: Haldun Kurama
NCs (NanoComposites) have many advantages compared to common bulk composite structures (Table 1).
1–100 nm in size, act as a bridge between bulk materials and atomic or molecular structures, making them worthy of scientific interest as engineered nanomaterials that are produced in large quantities for various applications such as chemistry, electronics, medicine, biology, and materials science.
If the packing density of the chains is low and the chain structure is parallel to the silicate surfaces, this represents a monolayer structure.
However, this precursor process forms the composite structure.
Unlike the paraffin structure, if it continues in layers (bi-layer structure), it can be said that an intermediate composite structure can be formed which will have regions of very high and very low reinforcement concentration for the final product.
Online since: June 2010
Authors: O.A. Olafuyi
These factors include pore structure and wettability of the porous medium.
However, a number of theoretical investigations have indicated significant effects of the pore structure on capillary pressure curves [57 - 59].
The degree of this alteration is determined by the interactions of the oil constituents, the mineral surface, and the brine chemistry.
Spanne,, Media Axis Analysis of Void Structure in 3-D Tomographic Images of Porous Media.
Relationships of Pore Structure to Fluid Behaviour in Low Permeability Gas Sands.
Online since: October 2006
Authors: Caroline Bonafos, G. Benassayag, Michele Perego, A. Mouti, S. Schamm, Marco Fanciulli
The synthesis of ncs has been achieved by many different techniques, such as laser ablation [3], colloidal chemistry [4], sol-gel processes [5], chemical vapor deposition [6], molecular beam epitaxy [7], ion beam synthesis [8], evaporation and subsequent annealing of multilayered structures [9-10].
A similar structure was fabricated using HfO2 instead of Al2O3.
The 1000°C annealed sample shows a similar structure.
The HREM image does not show any crystalline structure in this silicon rich layer.
Figura 9: Defocused bright field (left) and HREM (right) images of the 900°C annealed HfO2/SiO/HfO2 multilayer structure The TOF-SIMS profiles of the as-deposited and annealed HfO2/SiO/HfO2 multilayer structure are shown in figure 8.
Online since: February 2007
Authors: Bin Zhu, Jin Rui Xu, Xiang Rong Liu, Jun Cai Sun, Z.Q. Mao
Mao 5 1 Department of Chemical Engineering & Technology, Royal Institute of Technology (KTH), S-100 44 Stockholm, Sweden 2 Goeta Technology Developer International, S-171 60, Solna, Sweden 3 Department of Physical Chemistry, Norwegian University Science and Technology, 7491 Trondheim, Norway 4 Institute of Materials and Technology, Dalian Maritime University, Dalian 116026, P.
After sintering, the carbon was removed from the mixture in order to form a porous structure in the anode.
Online since: October 2011
Authors: Mei Shan Gao, Shi He Wang, Xiao Ming Wang, Ming Chun Guo
The pressure sensors are equipped at inlet and outlet of flue gas and upstream and downstream side of eliminator to get the pressure loss of device. 1-inlet of flue gas; 2-MRU flue gas analyzer; 3-temperature sensor; 4-pressure sensor; 5-filler; 6-eliminator; 7-outlet of flue gas; 8- seawater tank Fig.1 Experimental device Axis Sea water inlet; Smoke gas outlet Sea water outlet; Smoke gas inlet Wall Fig. 2 Schematic diagram of computational region Simulation Fig. 2 is schematic diagram of computational domain, entire region is axis metric structure, top and bottom is seawater inlet condition and gas inlet condition respectively, the right boundary condition is the walls.
,Kunesh,J.G,Industrial & Engineering Chemistry research,l995,34(4):l273-1279
Online since: July 2012
Authors: Xiao Min Luo, Dong Qiu Wu, Fei Fei Yang
Study on biological safety of TiO2 nanomaterials Xiaomin Luo1, a, Dongqiu,Wu2, b and Feifei Yang3, c 1 College of Resource and Environment, Shaanxi University of Science &Technology, Xi’an 710021, China 2 College of Chemistry and Chemical Engineering, Shaanxi University of Science &Technology, Xi’an 710021, China aluoxiaomin@sust.edu.cn, bwudongqiu2006@126.com, c513084032@qq.com Keywords: TiO2 nonmaterial, Biological safety, Exposure routes, Health.
TiO2 nanometer particles have highly redox ability in daylight and swallowed by phagocyte in normal structure.