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Online since: December 2022
Authors: Dong Feng Guo, Xiao Jun Ma, Xiao Yan Ma, Jian Hong Fang
The molecular weight of asphalt phase increases due to the association of structure, and its ability to resist high-temperature shear deformation and deformation recovery are enhanced.
As its high spatial resolution, as well as the ability to test Nano Mechanics and physical properties of materials, Atomic Force Microscope (AFM) has been widely applied in physics, chemistry and other fields in recent years.
With the increase of UV aging and radiation, the number of peak structure clusters on the surface of rubber asphalt decreases continuously.
With the further prolong of UV aging time, the peak structure cluster in the micro morphology of rubber asphalt gradually widens, the fluctuation degree becomes weaker, the area of flat area further increases, and the color of the area outside the structure cluster also changes significantly.
Evolution of the Structure and Properties of Crumb Rubber Modified Asphalt in Aging Process.
As its high spatial resolution, as well as the ability to test Nano Mechanics and physical properties of materials, Atomic Force Microscope (AFM) has been widely applied in physics, chemistry and other fields in recent years.
With the increase of UV aging and radiation, the number of peak structure clusters on the surface of rubber asphalt decreases continuously.
With the further prolong of UV aging time, the peak structure cluster in the micro morphology of rubber asphalt gradually widens, the fluctuation degree becomes weaker, the area of flat area further increases, and the color of the area outside the structure cluster also changes significantly.
Evolution of the Structure and Properties of Crumb Rubber Modified Asphalt in Aging Process.
Online since: October 2022
Authors: Jindřich Melichar, Ámos Dufka, Tomáš Melichar, Jiří Bydžovský
In contrast, metakaolin geopolymers have a much denser structure, thus achieving greater strength.
Cracks are limited in the structure.
Fig. 3: View of the matrix structure based on alkali activated fly ash - reference.
The relatively compact structure and the as yet unreacted ash grain are evident.
References [1] DAVIDOVITS J.: Chemistry of geopolymeric systems, Terminology.
Cracks are limited in the structure.
Fig. 3: View of the matrix structure based on alkali activated fly ash - reference.
The relatively compact structure and the as yet unreacted ash grain are evident.
References [1] DAVIDOVITS J.: Chemistry of geopolymeric systems, Terminology.
Online since: September 2011
Authors: Roland Grössinger, Nasir Mehmood, Rieko Sato Turtelli, Muhammad Aamir Raza, Sohail Afzal Khan, Sajid Raza Choudry
The XRD pattern shows that all samples exhibit a single phase spinel structure and improvement and sharpness in intensity of peaks with increasing annealing temperature.
Cobalt ferrite, with a partially inverse spinel structure with cubic phase having space group Fd3m, is one of the most important and most abundant magnetic materials.
Refinement of X-ray data shows that samples are composed of 100 % spinel structure, no additional peaks and impurity phases were found.
Erman, "Optical, magneto-optical and mössbauer spectroscopy on Co3+……. substituted cobalt ferrite" Journal of Physics and Chemistry of Solids, vol. 46, (1985) 411-416
Cobalt ferrite, with a partially inverse spinel structure with cubic phase having space group Fd3m, is one of the most important and most abundant magnetic materials.
Refinement of X-ray data shows that samples are composed of 100 % spinel structure, no additional peaks and impurity phases were found.
Erman, "Optical, magneto-optical and mössbauer spectroscopy on Co3+……. substituted cobalt ferrite" Journal of Physics and Chemistry of Solids, vol. 46, (1985) 411-416
Online since: January 2013
Authors: Marco Mauceri, Danilo Crippa, Francesco La Via, Andrea Severino, Andrea Canino, Massimo Camarda, Carmelo Vecchio, Antonino La Magna
This process gives several advantages because it gives the opportunity to increase the throughput and consequently to reduce the cost of epitaxy, using new reactor structures, and to reduce several kind of defects (Basal Plane Dislocations, Stacking Faults, Threading Dislocations) and to decrease the surface roughness at the same time.
The standard chemistry for the CVD growth of SiC has been extensively studied and reviewed elsewhere[] R.F Davis, G.
In this paper epitaxial growth by chlorinated precursors will be reviewed in detail and the effect of the high growth rate process on the throughput of different epitaxial reactor structures will be shown.
In this paper has been shown that the high growth rate process using chloride precursors can reduce the high cost of silicon carbide epitaxy, increasing the wafer throughput using new reactor structures.
The standard chemistry for the CVD growth of SiC has been extensively studied and reviewed elsewhere[] R.F Davis, G.
In this paper epitaxial growth by chlorinated precursors will be reviewed in detail and the effect of the high growth rate process on the throughput of different epitaxial reactor structures will be shown.
In this paper has been shown that the high growth rate process using chloride precursors can reduce the high cost of silicon carbide epitaxy, increasing the wafer throughput using new reactor structures.
Online since: November 2014
Authors: Miao Shi, Ye Yuan, Yi Nok Ng, Bing Song Yu, Ying Guo
DTA study demonstrates that the structure of tremolite was destroyed at 900 – 1100°C, while TG study demonstrates the tremolite has such little water that it lost only 0.89 – 1.33% of its weight when heated to 900 – 1100°C.
Introduction Nephrite, a form of the two precious jade(nephrite and jadeite), is almost a monomineralic rock of amphibole in the tremolite(Ca2Mg5Si8O22(OH)2)-actinolite(Ca2(Mg, Fe2+)5Si8O22(OH)2) series; it is famous for its high toughness and fine compactness which from the interlocking-felted texture formed by cryptocrystalline structure[1].
Besides of the structure characterization, nephrite samples were analyzed by EPMA for mineral chemistry.
DTA curves demonstrate that the structure of tremolite was destroyed at 900 – 1100°C, while TG curves show that samples have been undergone a weight loss about 0.89 – 1.33% of its weight between 900 – 1100°C.
Structures of tremolite was started to destroy when heated to the temperature of 900°C, and meanwhile the mineral underwent a weight loss of about 0.89 – 1.33% of its own weight.
Introduction Nephrite, a form of the two precious jade(nephrite and jadeite), is almost a monomineralic rock of amphibole in the tremolite(Ca2Mg5Si8O22(OH)2)-actinolite(Ca2(Mg, Fe2+)5Si8O22(OH)2) series; it is famous for its high toughness and fine compactness which from the interlocking-felted texture formed by cryptocrystalline structure[1].
Besides of the structure characterization, nephrite samples were analyzed by EPMA for mineral chemistry.
DTA curves demonstrate that the structure of tremolite was destroyed at 900 – 1100°C, while TG curves show that samples have been undergone a weight loss about 0.89 – 1.33% of its weight between 900 – 1100°C.
Structures of tremolite was started to destroy when heated to the temperature of 900°C, and meanwhile the mineral underwent a weight loss of about 0.89 – 1.33% of its own weight.
Online since: July 2017
Authors: Bedra Mahmoudi, Ahmed Mouhoub, Brahim Mahmoudi, Hamid Menari, Abdennour Mougas
In all PS applications, information about the pore size and their distribution and surface chemistry and their dependence on the fabrication conditions plays a decisive role.
We investigate the structure and the optical properties of moderately boron-doped Si wafers.
This structure is suitable for its use in light trapping and light-diffusing.
Note the presence of a doublet structure separated by 40 meV.
Yang, Reflectivity of porous pyramids structured silicon surface.
We investigate the structure and the optical properties of moderately boron-doped Si wafers.
This structure is suitable for its use in light trapping and light-diffusing.
Note the presence of a doublet structure separated by 40 meV.
Yang, Reflectivity of porous pyramids structured silicon surface.
Online since: June 2014
Authors: Yong Liang Zhang, Yuan Xin Qu, Xiao Chun Liu, Bo Cong
(2) For structure model of blackout plasma it is very complex.
It needs a great amount of simulation experiment and data analysis to build and test blackout plasma structure model
(3) For effects of blackout plasma on EW propagation its structure model changes without intermission.
Appropriate excitation wave transmitted from vehicle should accord to plasma’s structure model.
Flamn: Plasma diagnosis: discharge parameter and chemistry, Beijing, Science Press (2001) [4] Zeng Zhaoxian, Wang Shijin, Zeng Li: Shanghai Space, 5 (2006), p. 41-45 (in Chinese) [5] A.
It needs a great amount of simulation experiment and data analysis to build and test blackout plasma structure model
(3) For effects of blackout plasma on EW propagation its structure model changes without intermission.
Appropriate excitation wave transmitted from vehicle should accord to plasma’s structure model.
Flamn: Plasma diagnosis: discharge parameter and chemistry, Beijing, Science Press (2001) [4] Zeng Zhaoxian, Wang Shijin, Zeng Li: Shanghai Space, 5 (2006), p. 41-45 (in Chinese) [5] A.
Online since: January 2015
Authors: Qiang Li, Cheng Zhi Chuai, Zhe Wang, Hui Liu
Radiation dose and polymer structure determine which is preferred response between the degradation and cross-linking reaction.
High dose radiation is beneficial to the degradation of the polymer structure, while low dose radiation is beneficial to the cross-linking of the polymer structure in generally.
The structure of polymer is determined by low dose radiation to the type of polycondensation polymer (such as polyester, polyamide and polysiloxane, etc.)
Groups with active points in combination with each other, large molecular chain formed, chain and chain entanglement between each other, thus a three-dimensional network structure formed.
European Journal of Medicinal Chemistry, 2004, 12(85):689-695
High dose radiation is beneficial to the degradation of the polymer structure, while low dose radiation is beneficial to the cross-linking of the polymer structure in generally.
The structure of polymer is determined by low dose radiation to the type of polycondensation polymer (such as polyester, polyamide and polysiloxane, etc.)
Groups with active points in combination with each other, large molecular chain formed, chain and chain entanglement between each other, thus a three-dimensional network structure formed.
European Journal of Medicinal Chemistry, 2004, 12(85):689-695
Online since: March 2012
Authors: T.L. Liu, S.J. Cheng, Y.C. Liou, J.M. Miao
Besides, a micro-mixer should be easy to operate and convenient to carry around, and its light structure can substantially bring down the manufacturing cost.
Judging from the development towards integrated analytical system on a chip, such as lab-on-a-chip, the development of high-efficiency micro-mixers with parallelized capacity would have a great influence on chemistry and biotechnology fields.
To achieve this, different flow channel configurations and wall structures are designed and tested in the past ten years.
Lin et al. [8] observed that a combination of square-wave structure and a cyclical cubic groove could be used to strengthen mixing effect.
Their efforts are intended to destroy laminar flow structure to be vortex flow, thereby to speed up the mixing process of two or more fluids within the micro-channels.
Judging from the development towards integrated analytical system on a chip, such as lab-on-a-chip, the development of high-efficiency micro-mixers with parallelized capacity would have a great influence on chemistry and biotechnology fields.
To achieve this, different flow channel configurations and wall structures are designed and tested in the past ten years.
Lin et al. [8] observed that a combination of square-wave structure and a cyclical cubic groove could be used to strengthen mixing effect.
Their efforts are intended to destroy laminar flow structure to be vortex flow, thereby to speed up the mixing process of two or more fluids within the micro-channels.
Constitutive Equation for Thermal Strain in the Mushy Zone during Solidification of Aluminium Alloys
Online since: March 2006
Authors: Aage Stangeland, Dmitry G. Eskin, Asbjørn Mo
Constitutive Equation for Thermal Strain in the Mushy Zone
During Solidification of Aluminium Alloys
Aage Stangeland1, a, Asbjørn Mo
1,b, Dmitry Eskin
2,c
1
SINTEF Materials and Chemistry, P.O.
During cooling of the alloy, solid coherent structures will first be formed at the bottom and walls near both the left and right ends of the mould [12].
This coherent structure will now be fixed to the left end of the casting mould due to the T-shape of the cavity.
The coherent structure will also be connected to the moving block as described previously.
The temperature at the position where the two coherent structures is merged into one coherent structure is measured continuously, and the temperature when the moving block starts to move leftwards is in this work called the temperature at the onset of contraction, Tth.
During cooling of the alloy, solid coherent structures will first be formed at the bottom and walls near both the left and right ends of the mould [12].
This coherent structure will now be fixed to the left end of the casting mould due to the T-shape of the cavity.
The coherent structure will also be connected to the moving block as described previously.
The temperature at the position where the two coherent structures is merged into one coherent structure is measured continuously, and the temperature when the moving block starts to move leftwards is in this work called the temperature at the onset of contraction, Tth.