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Online since: August 2020
Authors: Andrey Vishnevsky, Fedor L. Kapustin
The chemical-mineral and grain composition data, properties and their correspondence to Russian Standard 25818 in order to use ash in the production of concrete and products based on it are presented.
The environmental safety, chemical composition, content of combustibles and free calcium oxide, the grain composition and specific surface area are the main characteristics for assessment of possibility of ash using in concrete production.
It is known that the addition of gypsum stone accelerates the interaction of Ca(OH)2 and silica resulting in an increasing of number of low-basic calcium hydrosilicates and increases the strength of cement stone [6].
The environmental safety, chemical composition, content of combustibles and free calcium oxide, the grain composition and specific surface area are the main characteristics for assessment of possibility of ash using in concrete production.
It is known that the addition of gypsum stone accelerates the interaction of Ca(OH)2 and silica resulting in an increasing of number of low-basic calcium hydrosilicates and increases the strength of cement stone [6].
Online since: December 2014
Authors: Yu Dong Feng, Ming Yu Han, Yi Wang, Zhi Min Wang, Hu Wang, Miao Yang, Kai Zhao, Xiao Mei Su, Xue Lei Li
Vacuum evaporation was a process which heated material by using vaporization and made the evaporated grain to spray on the substrate and formed solid film finally [6].
Open-circuit voltage was likely to the more recombination occurred in grain boundaries because of smaller grain size in low-temperature process compared with high-temperature process.
According to relevant research, incorporating a small number of sodium into CIGS thin film was contribute to improve its performance, thus, sodium was important to fabricate efficient CIGS thin film solar cells [15].
CIGS grain was smaller and the concentration of carrier was lower and there was high resistivity (In0.68Ga0.32)2Se3 phase in low temperature compared with in high temperature were discovered [17].
Open-circuit voltage was likely to the more recombination occurred in grain boundaries because of smaller grain size in low-temperature process compared with high-temperature process.
According to relevant research, incorporating a small number of sodium into CIGS thin film was contribute to improve its performance, thus, sodium was important to fabricate efficient CIGS thin film solar cells [15].
CIGS grain was smaller and the concentration of carrier was lower and there was high resistivity (In0.68Ga0.32)2Se3 phase in low temperature compared with in high temperature were discovered [17].
Online since: January 2010
Authors: Pedro M. Faia, C.S. Furtado, Mario J. Santos
The grains, roughly round shaped, and grain
agglomerates that dominate the microstructure, seem to be in a random orientation.
Typically, the conduction mechanism of metal semiconductor oxides is controlled by the amplitude of the potential barrier, which electronic superficial states due to chemical adsorption of oxygen species, for instance − 2O , induce in the grain surface and in the region between grains, an area depleted of electrons.
However it is perceptible when comparing the real part of the impedance plots at 40Hz, that, for the same working temperatures, when RH increases, impedance also increases (as the number of the physisorbed layers of water gets higher, for the same operating temperature, the complex impedance plot area increases instead of decreasing).
Typically, the conduction mechanism of metal semiconductor oxides is controlled by the amplitude of the potential barrier, which electronic superficial states due to chemical adsorption of oxygen species, for instance − 2O , induce in the grain surface and in the region between grains, an area depleted of electrons.
However it is perceptible when comparing the real part of the impedance plots at 40Hz, that, for the same working temperatures, when RH increases, impedance also increases (as the number of the physisorbed layers of water gets higher, for the same operating temperature, the complex impedance plot area increases instead of decreasing).
Online since: March 2008
Authors: Jean Marie Dubois, V. Fournée, Marie Geneviève Barthés-Labrousse
Surface studies in UHV require the use of large single grains (few mm at least).
Most CMAs have a non-congruent melting and the growth of single grains is not an easy task.
As a result, only a limited number of systems have been studied so far.
The number of surface studies on periodic CMA is more limited so far.
Moreover, no effect of surface orientation or grain boundaries on the final (saturated) state was evidenced when comparing single grain Al63Cu24Fe13 and hot isostatically pressed (multiple grain) Al66Cu22Fe12 samples.
Most CMAs have a non-congruent melting and the growth of single grains is not an easy task.
As a result, only a limited number of systems have been studied so far.
The number of surface studies on periodic CMA is more limited so far.
Moreover, no effect of surface orientation or grain boundaries on the final (saturated) state was evidenced when comparing single grain Al63Cu24Fe13 and hot isostatically pressed (multiple grain) Al66Cu22Fe12 samples.
Online since: July 2018
Authors: Alain Portavoce, Khalid Hoummada
The number of atomic exchanges stays nevertheless relatively low and k ~ 1.
Once the phase nuclei formed, their growth involves a sufficient number of local atomic jumps to be diffusion-controlled and to follow a parabolic growth versus time.
(a) side view of the volume, and (b) NiSi grains located at the Ni2Si/Si interface in top view.
For example, in the case of columnar grains with a square section fg = L2/(L+d)2 and fgb = 1 - L2/(L+d)2 with L the grain lateral size and d the GB lateral size.
Gas, Lattice and grain boundary self‐diffusion in Ni2Si: Comparison with thin‐film formation, J.
Once the phase nuclei formed, their growth involves a sufficient number of local atomic jumps to be diffusion-controlled and to follow a parabolic growth versus time.
(a) side view of the volume, and (b) NiSi grains located at the Ni2Si/Si interface in top view.
For example, in the case of columnar grains with a square section fg = L2/(L+d)2 and fgb = 1 - L2/(L+d)2 with L the grain lateral size and d the GB lateral size.
Gas, Lattice and grain boundary self‐diffusion in Ni2Si: Comparison with thin‐film formation, J.
Online since: March 2014
Authors: Dashnor Hoxha, Duc Phi Do, Naima Belayachi
Two parameters and on the definition of Biot’s coefficient are bulk modulus of the drained medium and solid grains, respectively.
This is to say that the number of cycles Nc for the damage assessment for a period of N years Nc(N) is calculated by knowing the number of cycles for ten years (N10) by : Nc(N)= N10* N/10.
The number of stress cycles for the first ten years of the study is counted using rainflow method.
While many laboratory results are available for the white tuffeau the cyclic tests performed on this material are often limited to a number of only some hundreds cycles which makes impossible an identification of all model parameters.
Do (2013) Modeling of two phases flow in capillary porous medium by a microscopic discrete approach, European Journal of Environmental and Civil Engineering, Vol 17, Issue 6, pp. 444-452 [9] Van Xuan Tran (2013) Criteria for multiaxial fatigue inititation with grat number of cycles, Code_Aster documentation, R7.04.04, www.code-aster.org [10] XIAO, Jian-Qing Xiao, DING, De-Xin, JIANG, Fu-Liang, XU, GenXu.
This is to say that the number of cycles Nc for the damage assessment for a period of N years Nc(N) is calculated by knowing the number of cycles for ten years (N10) by : Nc(N)= N10* N/10.
The number of stress cycles for the first ten years of the study is counted using rainflow method.
While many laboratory results are available for the white tuffeau the cyclic tests performed on this material are often limited to a number of only some hundreds cycles which makes impossible an identification of all model parameters.
Do (2013) Modeling of two phases flow in capillary porous medium by a microscopic discrete approach, European Journal of Environmental and Civil Engineering, Vol 17, Issue 6, pp. 444-452 [9] Van Xuan Tran (2013) Criteria for multiaxial fatigue inititation with grat number of cycles, Code_Aster documentation, R7.04.04, www.code-aster.org [10] XIAO, Jian-Qing Xiao, DING, De-Xin, JIANG, Fu-Liang, XU, GenXu.
Online since: December 2014
Authors: Shu Fang Qian
As the price of reform, one of reforms, the government has increased the purchase price of grain, cotton, oil, fuel, and other 18 kinds of agricultural products and the ex-factory price of coal, iron ore, pig iron, steel ingots, billets, non-ferrous metals, cement and other industrial products.
Gradual momentum of the faster rate appreciation after the 2006 year, and gradually formed a firm expectation of RMB appreciation, so that made a large number of international capital flow into the country.
Affected by the U.S. financial crisis, the global financial crisis, China's economy has suffered a serious impact, at the same time, the exports dropped sharply, a large number of import and export enterprises are facing a severe test, unemployment has risen sharply.
Journal of Economic Perspectives, Volume 3, Number 3, Summer 1989, Pages 51-77
Journal of Economic Perspectives-Volume 12, Number 1—Winter 1998—Pages 27-36
Gradual momentum of the faster rate appreciation after the 2006 year, and gradually formed a firm expectation of RMB appreciation, so that made a large number of international capital flow into the country.
Affected by the U.S. financial crisis, the global financial crisis, China's economy has suffered a serious impact, at the same time, the exports dropped sharply, a large number of import and export enterprises are facing a severe test, unemployment has risen sharply.
Journal of Economic Perspectives, Volume 3, Number 3, Summer 1989, Pages 51-77
Journal of Economic Perspectives-Volume 12, Number 1—Winter 1998—Pages 27-36
Online since: December 2003
Authors: Maria Vallet-Regí, J. Peña, Isabel Izquierdo-Barba
All types of coatings are characterized by a porous morphology that
increases with the number of layers.
The number of coatings does not only affect the porosity of the annealed layers, it also determines their roughness and particle size.
The AFM characterization allows to quantify the diminution in the roughness (rms) and in the particle size with the number of layers deposited.
In fact, the roughness profile is composed by sharp peaks and valleys attributable to the particles of the calcium phosphate layer and by less defined curves caused by the coarse grains of Al2O3.
These coatings present different roughness (rms), particle size and thickness as a function of the number of layers deposited.
The number of coatings does not only affect the porosity of the annealed layers, it also determines their roughness and particle size.
The AFM characterization allows to quantify the diminution in the roughness (rms) and in the particle size with the number of layers deposited.
In fact, the roughness profile is composed by sharp peaks and valleys attributable to the particles of the calcium phosphate layer and by less defined curves caused by the coarse grains of Al2O3.
These coatings present different roughness (rms), particle size and thickness as a function of the number of layers deposited.
Online since: April 2004
Authors: Sukky Jun, Young Min Lee, Sung Youb Kim, Se Young Im
With the help of growing performance of modern computers, there have been an increasing
number of recent atomic-resolution simulations of incipient plasticity in nanoindentation [1-10],
mostly employing molecular dynamics or molecular mechanics.
Furthermore, comprehensive studies of pile-up profiles [10], surface step effects [3], grain boundaries effects [7,8], dislocation nucleation criterion [5,9], and so on, have been performed.
Perfect bulk atoms of which the atomic coordination number equals to 12 of the perfect face-centered cubic (FCC) crystal, are eliminated in the following figures.
Total number of atoms is 1,512,000 and the film thickness is 21 (nm) (Model 1); t = (1) 0.2455, (2) 0.2475, (3) 0.2500, (4) 0.2515, (5) 0.2520, (6) 0.2525 (ns).
Total number of atoms is 504,000 and the film thickness is 7 (nm) (Model 3); t = (1) 0.0800, (2) 0.0825, (3) 0.0850 (ns).
Furthermore, comprehensive studies of pile-up profiles [10], surface step effects [3], grain boundaries effects [7,8], dislocation nucleation criterion [5,9], and so on, have been performed.
Perfect bulk atoms of which the atomic coordination number equals to 12 of the perfect face-centered cubic (FCC) crystal, are eliminated in the following figures.
Total number of atoms is 1,512,000 and the film thickness is 21 (nm) (Model 1); t = (1) 0.2455, (2) 0.2475, (3) 0.2500, (4) 0.2515, (5) 0.2520, (6) 0.2525 (ns).
Total number of atoms is 504,000 and the film thickness is 7 (nm) (Model 3); t = (1) 0.0800, (2) 0.0825, (3) 0.0850 (ns).
Online since: February 2022
Authors: Aisylu Sagitova, Asgat Gazizov, Elena Popova, Vadim Abzalilov
At temperatures above 250-300°C, the strength of the cement binder starts to deteriorate and at temperatures above 550°C, the quartz grains that make up the aggregates, sand and gravel, change their modification with increased volume, which causes the formation of micro-cracks [3].
Sample data by weight before and after treatment Sample number Drying time, [h] Weight of metal plate before machining, [g] Weight of the metal plate after machining, [g] 1 96 49 88 2 50 89 3 49 87 4 50 88 5 50 89 6 49 88 7 49 89 8 50 89 9 49 88 10 50 88 11 49 118 12 50 120 13 48 119 14 50 118 15 50 120 16 49 122 17 49 120 18 49 119 19 49 120 20 49 87 After 96 hours of drying (Fig. 6, 7, Table 2), fire tests were carried out on a building material ignition apparatus with samples, Nos. 1-5.
(1) Where m1i is the mass of the sample before the test, g; m2i - mass of the sample after the test, g; i - is the sample number.
Weight of samples before and after experiments Sample number Drying time of the samples, [h] Weight of specimens before test, [g] Weight of specimens after the test, [g] Sample mass loss Pi, % 1 96 88 71 19,3 2 89 75 15,7 3 87 70 19,5 4 88 73 17,0 5 89 72 19,1 6 88 60 31,8 7 89 58 34,8 8 89 57 35,9 9 88 60 31,8 10 88 57 35,2 11 118 105 11,0 12 120 101 15,8 13 119 96 19,3 14 118 104 11,8 15 120 98 18,3 16 122 74 39,3 17 120 78 35,0 18 119 75 36,9 19 120 40 66,6 20 87 64 26,4 The Results of the Tests Test result for 6% TES mortar.
Khafizov, Optimal temperature and time of wood impregnation with Bioperin antiseptic MIG-09, Oil and Gas Business, number 1, 2020, p.126-139.
Sample data by weight before and after treatment Sample number Drying time, [h] Weight of metal plate before machining, [g] Weight of the metal plate after machining, [g] 1 96 49 88 2 50 89 3 49 87 4 50 88 5 50 89 6 49 88 7 49 89 8 50 89 9 49 88 10 50 88 11 49 118 12 50 120 13 48 119 14 50 118 15 50 120 16 49 122 17 49 120 18 49 119 19 49 120 20 49 87 After 96 hours of drying (Fig. 6, 7, Table 2), fire tests were carried out on a building material ignition apparatus with samples, Nos. 1-5.
(1) Where m1i is the mass of the sample before the test, g; m2i - mass of the sample after the test, g; i - is the sample number.
Weight of samples before and after experiments Sample number Drying time of the samples, [h] Weight of specimens before test, [g] Weight of specimens after the test, [g] Sample mass loss Pi, % 1 96 88 71 19,3 2 89 75 15,7 3 87 70 19,5 4 88 73 17,0 5 89 72 19,1 6 88 60 31,8 7 89 58 34,8 8 89 57 35,9 9 88 60 31,8 10 88 57 35,2 11 118 105 11,0 12 120 101 15,8 13 119 96 19,3 14 118 104 11,8 15 120 98 18,3 16 122 74 39,3 17 120 78 35,0 18 119 75 36,9 19 120 40 66,6 20 87 64 26,4 The Results of the Tests Test result for 6% TES mortar.
Khafizov, Optimal temperature and time of wood impregnation with Bioperin antiseptic MIG-09, Oil and Gas Business, number 1, 2020, p.126-139.