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Online since: April 2008
Authors: Bo Jonson, Björn Zethræus, Ruud Beerkens, Adriaan Lankhorst
The notation in the figures sieved means that the grain size fraction of all raw materials is between 63 - 125 µm.
Figure 2 shows the number of bubbles remaining after 30 minutes melting time
Bubbles per 100 g glass 0 200 400 600 800 1000 1200 1400 1600 Na-, CaCO3 Na-, K-, CaCO3 Na silicate CaCO3 Na, CaCO3 K silicate NaCO3, Ca silicate Na-, K-, Ca silicates Compound Number of bubbles Average non sieved Average sieved Average total Figure 2.
Number of bubbles, 30 min melting at 1400 ºC, for different batch components Figures 1 and 2 clearly show that substitution of carbonates in the batch would promote batch reactivity and increase the fining efficiency.
Online since: January 2018
Authors: Karel Kolář, Pavel Reiterman, Jiří Litoš, Miroslav Petrtýl
The level of reduced wheel pressure was gradually increased with number of cycles.
Compressive strength was determined on cubic specimens 100x100x100mm, flexural strength using prismatic specimens 40x40x160 mm commonly used for fine-grained composites.
Number of cycles Reduced wheel pressure [kN] Reduced axle pressure [kN] Age of MSC [days] 0 30 60 1 Up to 0.5 mil. 30 60 1. – 8. 0.5 – 1.0 mil. 60 120 8. – 14. 1.0 – 1.5 mil. 60 120 15. – 21. 1.5 – 2.0 mil. 60 120 22. – 28. 2.0 – 2.5 mil. 60 120 29. – 35. 2.5 – 3.0 mil. 60 120 36.
Measured area Reduced wheel load [kN] Number of cycles Maximal extortion [mm] kst [kN/mm] Left 30 0.5 mil. 1.378 21.8 Right 30 0.5 mil. 1.352 22.2 Left 60 1.0 mil. 1.672 35.9 Right 60 1.0 mil. 1.646 36.5 Left 60 1.5 mil. 1.662 36.1 Right 60 1.5 mil. 1.648 36.4 Left 60 2.0 mil. 1.670 35.9 Right 60 2.0 mil. 1.666 36.6 Left 60 2.5 mil. 1.787 33.6 Right 60 2.5 mil. 1.828 32.8 Left 60 3.0 mil. 1.672 35.9 Right 60 3.0 mil. 1.616 37.2 Determination of mechanical properties was carried out using non-destructive and destructive testing, of which detailed results are shown in Tab. 3.
Online since: October 2018
Authors: Aleksey V. Zhdanov, Anna A. Voznesenskaya, D.A. Kochuev
There is a large number of works devoted to the use of various carbon materials (nanotubes, nanocomposites, diamond-like films [2]) as a means of increasing the bio and hemocompatibility of a medical device.
The interaction of carbon with titanium occurs with the loss of energy of the plasma torch, with the partial formation of a chemical bond and the growth of germs of grains of titanium carbide [12].
The formation of "islands" occurs when CNTs are applied to the surface of polyurethane, with an increase in the number of passes in order to increase the uniformity of the distribution of CNTs on the surface of polyurethane.
Conclusion Several samples of coatings with different experimental parameters (concentration, distance from the nozzle to the substrate, the number of deposited layers) were obtained as a result of the work performed.
Online since: April 2012
Authors: Xian Li Liu, Cai Xu Yue, Ming Ming Yu, Jia Yi Zhang, Ming Yang Wu
Unit type and number of nodes are shown in Table 2.
Table 2 Unit set of simulation model Model type of unit Number of units Number of nodes Incident bar C3D8 45760 50799 Specimen C3D8 1536 1881 Exit pole C3D8 45760 50799 The meshed model is shown in Fig.2.
Ramesh , Mechanical behavior and dynamic failure of high-strength ultrafine grained tungsten under uniaxial compression.
Online since: February 2014
Authors: Karel Kubečka, Pavel Mec, Tereza Murínová
Nowadays there are also various libraries of thermal curves [8], and others can be found in a number of available scientific literatures [1].
At present, construction materials are relatively well understood with regard to thermal behavior and number of the phenomena has been well described.
The number of changes and their size can be determined in this way.
The grains of portlandite (Ca(OH)2) react with carbon dioxide (CO2) to form calcium carbonate (CaCO3) during concrete carbonation [2,5,6,7].
Online since: September 2013
Authors: Heng Qin Xu, Cheng Lin Ma
It showed that the first generation of carbon emitters was generate electricity and the number of vehicle emissions was also very impressive, especially in 2009, over 13 million car sales, in 2010, far more than in 2009.
The number of recent remained plant life energy was small and its quality was low.
The life energy utilization obtained a large number of applications.
Residual stresses caused by growth stresses within a stem with radially varying spiral grain angle - two numerical solution approaches: finite element method and transfer matrix method.
Online since: June 2015
Authors: Claudiu Nicolicescu, Iulian Ştefan, Bebe Adrian Olei
So, their reactivity is determined by the fineness of the powder particles and the number of point contacts between the particles.
Fig. 1 Homogeneous mixture BaCO3x6α-Fe2O3 As shown in the homogeneous mixture image, hematite particles being much finer than those of BaCO3 are spread as a powder on the barium carbonate pellet, increasing in this way the number of contact points at mixture heating for the ferrite formation.
Therefore, it should be mentioned that if for SM standard mixture were used powders with micron grain size, in the case of the 5SM and 20SM mixtures the majority granulation of hematite powders is in the submicron domain.
The decreases of firing temperature can be explained by increasing the number of the contact points between the small particles of hematite and BaCO3 particle according to the diagram from figure 1.
Online since: January 2013
Authors: Xin Tan, Xiao Long Shao, Qiong Qiong Liu
With the development of sewage treatment technology, a number of methods are now available for the elimination of ammonia nitrogen, each having its own advantages, disadvantages, and limitations.
Sathy Chandrasekhar[8] believes that the essence of activation is to deprive kaolin of its hydroxyls in the aluminum-oxygen octahedron so that the coordination number of aluminum atoms in kaolin changes from 6 to 4 or 5.
The ammonium ion exchange capacity of the material may be given as the total CEC, which is defined by the number of equivalents of fixed charges per amount of the material.
The mesh-like pore canals run through the material, which has fine and evenly-distributed grains.
Online since: October 2013
Authors: Yi Zhu He, Yu Wan Cen, Jian Qing Jiang, Hong Wei Zhou
Optical micrograph with prior austenite grains (nearly 50 mm) is shown in Fig. 1.
The fatigue life, Nf, is defined as the number of cycles corresponding to a 25% drop in cyclic stress response curves at half-time.
Hong et al. [4] found that above strain amplitude of 0.4% in the LCF of 316L ASS, gradual softening was observed up to some number of cycles, followed by secondaryhardening until failure.
The parameters of cyclic stress response are shown in Table 2, including εae (elastic strain amplitude), εap (plastic strain amplitude) and sa (stress amplitude), all of which are abtained at half-life. 2Nf represents number of reversals to failure.
Online since: July 2020
Authors: Junichiro Sameshima, Hideki Sako, Ai Hashimoto, Takayuki Kobayashi, Masayuki Nakamura, Shinichi Motoyama, Yuji Otsuka
Plan-View STEM Analysis In this sample, it was considered difficult to obtain a clear atomic resolution HAADF-STEM image due to crystal defects and grain boundaries in cross-sectional observation, so plan-view STEM observation was performed.
As the HAADF image intensity strongly depends on the atomic number, heavy atoms are observed brighter, and light atoms such as oxigen are difficult to be observed.
Considering the difference in the number of overlapping Ga atoms along the observation direction (<001>direction), k-Ga2O3 produces a contrast difference in the atomic columns in the HAADF image.
In Fig. 3(b), the yellow atomic columns have higher contrast intensity than red columns because the number of overlapping atoms at the yellow columns is larger in observation from <001> direction.
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