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Online since: April 2015
Authors: Zhenis Kusainova, Ardak Sapieva, Nurlan Musabekov, Kuanyshbek Musabekov, Sagdat Tazhibayeva
Furthermore, polymer – surfactant complexes are widely used as stabilizers of industrial dispersions and structure formers of soil.
Introduction Create high molecular surface-active substances (HMSAS) remains one of the main problems of modern colloid chemistry and physico-chemical mechanics.
Hysteresis anomalies of individual polymer solutions take place due to the fact that appearance and disappearance of the polymer structure require some time for relaxation [9].
If immediately after preparation of the solution its viscosity is relatively small, then over time as the formation of the structure it becomes more.
Introduction Create high molecular surface-active substances (HMSAS) remains one of the main problems of modern colloid chemistry and physico-chemical mechanics.
Hysteresis anomalies of individual polymer solutions take place due to the fact that appearance and disappearance of the polymer structure require some time for relaxation [9].
If immediately after preparation of the solution its viscosity is relatively small, then over time as the formation of the structure it becomes more.
Online since: February 2012
Authors: Chao Bian, Jian Hua Tong, Shan Hong Xia, Bei Lei Deng, Yin Bai, Gui Li Yan, Hong Zhang
Xiao Dan et al. [[] Dan Xiao, Hong-Yan Yuan, Jun Li, and Ru-Qin Yu, Surface-Modified Cobalt-Based Sensor as a Phosphate Sensitive Electrode, Analytical Chemistry. 67 (1995) 288-291.
] developed a cobalt based phosphate sensor in 1995.
The system structure diagram is shown in Fig.2.
In this figure, the area covered by the dashed line is the detection circuit structure diagram.
The voltage follower is used to construct the isolated structure to eliminate the interference on front-end circuit.
The system structure diagram is shown in Fig.2.
In this figure, the area covered by the dashed line is the detection circuit structure diagram.
The voltage follower is used to construct the isolated structure to eliminate the interference on front-end circuit.
Online since: January 2012
Authors: Xiao Quan Li
Experimental details
A structure schematic diagram for the cathode faceplate with branched cathode electrode was illustrated in Fig.1.
Fig.1 Structure schematic diagram for the cathode faceplate with branched cathode electrodes Fig.2 The packaging schematic diagram for the diode FED panel with field emitters Results and discussion In a FED panel, the function of CNT field emitters was to supply the electrons.
Seen from the fabrication structure of branched cathode electrode, the one branched cathode electrode would be composed of one emitter conducting layer and much emitter supporting layers, which were the etched ITO film.
Materials chemistry and physics.
Fig.1 Structure schematic diagram for the cathode faceplate with branched cathode electrodes Fig.2 The packaging schematic diagram for the diode FED panel with field emitters Results and discussion In a FED panel, the function of CNT field emitters was to supply the electrons.
Seen from the fabrication structure of branched cathode electrode, the one branched cathode electrode would be composed of one emitter conducting layer and much emitter supporting layers, which were the etched ITO film.
Materials chemistry and physics.
Online since: May 2016
Authors: Wanna T. Saengchantara, Sutthima Sriprasertsuk, Phatthiya Suwannason
Because of the porosity, thermal and sound insulation, lightweight material has attracted interest and has become a popular material in construction and chemistry work [1,2].
The pozzolanic reaction occurred under the heat treatment of fly ash could increase the mechanical properties and durability during the sintering process while strengthen structure has been obtained [7-11].
Results and Discussion 3.1 The effects of borax on the pore structure With the fly ash percentage increasing, it was found that the size of pores decreased, for example, pores of samples with 20-30 wt% fly ash were larger than those with 40-50 wt% fly ash.
The cross section structure of sample: As shown in Fig. 1.
The pozzolanic reaction occurred under the heat treatment of fly ash could increase the mechanical properties and durability during the sintering process while strengthen structure has been obtained [7-11].
Results and Discussion 3.1 The effects of borax on the pore structure With the fly ash percentage increasing, it was found that the size of pores decreased, for example, pores of samples with 20-30 wt% fly ash were larger than those with 40-50 wt% fly ash.
The cross section structure of sample: As shown in Fig. 1.
Online since: September 2007
Authors: Ming Yi Zheng, Kun Wu, Chun Yan Wang
Compressive Deformation of ZK60 Magnesium Alloy at Elevated
Temperature
Chun Yan WANG1, 2, a, Kun WU
1, b and
Ming yi ZHENG1, c
1
School of Materials Science and Engineering, Harbin Institute of Technology,
Harbin, 150001, China
2
Department of Materials and Chemistry Engineering, Heilongjiang Institute of Technology,
Harbin, 150050, China
awangchunyanhit@163.com, bwukun@hit.edu.cn,
czhenghe@hit.edu.cn
Keywords: Compressive deformation; ZK60 magnesium alloy; Dynamic recrystallization.
This requires, for instance, an improved knowledge of the structure-process and the structure-properties correlations under plastic deformation of the material.
As result, sub-grain structure is formed in the mantle region.
This requires, for instance, an improved knowledge of the structure-process and the structure-properties correlations under plastic deformation of the material.
As result, sub-grain structure is formed in the mantle region.
Online since: January 2009
Authors: Yu Juan Wang, Yun Fei Chen, Chang Zheng Xiang
This is
due to their high surface-to-volume ratio and the greater importance of surface chemistry, adhesion
and surface structure or roughness [3].
The solid walls are modeled as silicon atoms in a diamond crystal lattice structure.
Although both wall structure and roughness have been found to affect lubrication in MD simulations of Couette flow, these effects will not be considered here [6].
The solid walls are modeled as silicon atoms in a diamond crystal lattice structure.
Although both wall structure and roughness have been found to affect lubrication in MD simulations of Couette flow, these effects will not be considered here [6].
Online since: October 2006
Authors: Vladimir Ilich Sankin, Rositza Yakimova
-Petersburg, Russia
2
Department of Physics, Chemistry and Biology, Linköping University, SE-581 83
Linköping, Sweden
a
email: sankin@pop.ioffe.rssi.ru, bemail: roy@ifm.liu.se
Keywords: natural superlattice, miniband, Wannier-Stark localization, electrical field, field
induced localisation, negative differential conduction.
A multi-step photolithography was used, and by dry etching mesa structures of 0.35 mm in diameter with window for light exposure were created.
Therefore we can restrict our task to an observation of any of the WSL phenomena in order to determine a presence of WSL process in this device structure.
At a relatively low quality of p-n structures one has to try to achieve the fields with the W-S ladder conditions.
A multi-step photolithography was used, and by dry etching mesa structures of 0.35 mm in diameter with window for light exposure were created.
Therefore we can restrict our task to an observation of any of the WSL phenomena in order to determine a presence of WSL process in this device structure.
At a relatively low quality of p-n structures one has to try to achieve the fields with the W-S ladder conditions.
Online since: May 2004
Authors: W.W. Chen, Yi Bing Cheng, De Sheng Yan, P.I. Wang
Fig.1 As-hot-pressed α-sialon samples
(25mm in diameter), from left to right
and from top to bottom, A, B, C, D and E
(b)
(a)
50μm
50μm
Fig.2 Optical images of Sample C in (a) opaque area
(pore denoted by arrow); (b) translucence area
α-Sialon has a hexagonal crystal structure and is consisted of randomly orientated grains,
around 1 to 5µm in size, in an amorphous grain boundary glassy matrix.
Compared to single crystals, the transmissivity (I/I0) of sialon ceramics is dependent not only on the crystal structure, but also on the grain boundary properties. )exp()1(/ 2 0 uxRII −−= (1) Where I is the intensity of transmitted light, I0 is the intensity of incident light, R is the reflectivity, µ is the absorption coefficient, and x is thickness of a sample body.
For α-sialon ceramics, Sop and Sim are always issues due to its hexagonal structure, and pores and glass phase in ceramic matrix.
Soc., (1981) p.119 [8] K.A.Gachneidner and L.R.Eyring, Handbook on the Physics and Chemistry of Rare Earth, Vol. 4, North-Holland Pub., Amsterdam, (1979), p.268 Y-sialon (0.7mm) Gd-sialon (0.7mm) Y-sialon (0.7mm) Gd-sialon (1.06mm) Fig.5 As hot-pressed thick α-sialon samples (25mm in diameter) 350 400 450 500 550 600 650 700 750 0 50 100 150 200 250 Account Wave length (nm) Dy-α-sialon 4 F9/2 � 6H15/2 Fig.6 Photo luminescence spectrum of Dy-α-sialon excited by 350nm light 4F9/2 � 6 H13/2
Compared to single crystals, the transmissivity (I/I0) of sialon ceramics is dependent not only on the crystal structure, but also on the grain boundary properties. )exp()1(/ 2 0 uxRII −−= (1) Where I is the intensity of transmitted light, I0 is the intensity of incident light, R is the reflectivity, µ is the absorption coefficient, and x is thickness of a sample body.
For α-sialon ceramics, Sop and Sim are always issues due to its hexagonal structure, and pores and glass phase in ceramic matrix.
Soc., (1981) p.119 [8] K.A.Gachneidner and L.R.Eyring, Handbook on the Physics and Chemistry of Rare Earth, Vol. 4, North-Holland Pub., Amsterdam, (1979), p.268 Y-sialon (0.7mm) Gd-sialon (0.7mm) Y-sialon (0.7mm) Gd-sialon (1.06mm) Fig.5 As hot-pressed thick α-sialon samples (25mm in diameter) 350 400 450 500 550 600 650 700 750 0 50 100 150 200 250 Account Wave length (nm) Dy-α-sialon 4 F9/2 � 6H15/2 Fig.6 Photo luminescence spectrum of Dy-α-sialon excited by 350nm light 4F9/2 � 6 H13/2
Online since: June 2012
Authors: Wan Hui Wang, Ji Hu
Department of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang, Henan 471023, People’s Republic of China
aemail: librahuj@gmail.com, bemail: gracewong11@126.com
Keywords: Hyperbranched polyurethane; Solid–solid phase change material; Polyethylene glycol; Heat storage
Abstract.
They offer an opportunity of modification of the structure of the synthesized materials in a controlled way.
It is observed that both micrographs show obvious cross-extinction patterns, which imply that both of them are crystalline and their crystal structures are spherulites, but HB-PUPCM’s spherulites size is much smaller than that of PEG, indicating that the soft segment PEG’s crystallization in HB-PUPCM is confined by the hard segment, and the crystalline perfection of PEG has been destroyed.
At last, the spherulite structure is destroyed completely, and the visual field of POM is dark, but no liquid is observed at the heating process, which is indicated that the PEG soft segment has been transferred from crystal solid to amorphous solid.
They offer an opportunity of modification of the structure of the synthesized materials in a controlled way.
It is observed that both micrographs show obvious cross-extinction patterns, which imply that both of them are crystalline and their crystal structures are spherulites, but HB-PUPCM’s spherulites size is much smaller than that of PEG, indicating that the soft segment PEG’s crystallization in HB-PUPCM is confined by the hard segment, and the crystalline perfection of PEG has been destroyed.
At last, the spherulite structure is destroyed completely, and the visual field of POM is dark, but no liquid is observed at the heating process, which is indicated that the PEG soft segment has been transferred from crystal solid to amorphous solid.
Online since: June 2014
Authors: Hai Yan Bie, Meng Zhu Yang
Thermal Stress Analysis of Fiber Wrapped High-pressure Hydrogen Vessel
Haiyan Bie1,a, Mengzhu Yang1,b
1College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China
ahaiyanbie@163.com, bmzyangouc@163.com
Keywords: high-pressure hydrogen vessel, thermal stresses, simulation
Abstract.
During the modeling process, the physical model is divided into small pieces in order to maintain desirable grid structure.
And Fig. 2 is the grid structure.
Fig. 1 Physical model of the vessel Fig. 2 Grid structure of the vessel Numerical simulation and analysis 2.1 Stresses under pure mechanical loads In order to reveal the influence of thermal on the stress distribution of fiber wrapped high-pressure hydrogen vessel, it is necessary to know the stress and strain distributions of the vessel under pure mechanical load first.
During the modeling process, the physical model is divided into small pieces in order to maintain desirable grid structure.
And Fig. 2 is the grid structure.
Fig. 1 Physical model of the vessel Fig. 2 Grid structure of the vessel Numerical simulation and analysis 2.1 Stresses under pure mechanical loads In order to reveal the influence of thermal on the stress distribution of fiber wrapped high-pressure hydrogen vessel, it is necessary to know the stress and strain distributions of the vessel under pure mechanical load first.