Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: October 2014
Authors: Ping He, Yan Yi, Bo Li Zhai
But the process also exist some problems: the substrate after heat treatment at higher temperature, the film thickness uniformity is not easy to control, low resistivity, the existence of a large number of variables and the process, such as the PH value, reactant concentration ratio, temperature, organic impurities will affect gel or grain size and specific surface area, make its physicochemical properties affected, thus affecting the quality of the films.
Acknowledgements Kunming University of field projects: Complex shape optical microcavity disappear field research (Project number: XJL13004) References [1] liShun Cheng, Benshuang Sun, Jingming Zhong, Lijun He, Dongxin Wang, Huanming Chen.research progress of transparent conductive ITO thin films.
Acknowledgements Kunming University of field projects: Complex shape optical microcavity disappear field research (Project number: XJL13004) References [1] liShun Cheng, Benshuang Sun, Jingming Zhong, Lijun He, Dongxin Wang, Huanming Chen.research progress of transparent conductive ITO thin films.
Online since: July 2015
Authors: Bei Zhi Li, Chong Jun Wu, Jian Guo Yang, Steven Y. Liang
TABLE 1 MECHANICAL PROPERTIES OF SIC
SiC properties
density
Bending strength
Hardness Fracture Toughness
Elastic modulus
Poisson rate
Grain Size
ρ[g/cm3]
σb[MPa]
Hv[GPa]
KIC[MPa.m1/2]
E[GPa]
R[-]
dg[μm]
SiC
3.05
430
23
3.0
350
0.16
50
The grinding contact zone temperature was measured by a grindable thermocouple technique[17].
Table 2 gives 8 random experiment number to verify the model in formula (1).
Salomon, Process for machining metals of similar acting materials when being worked by cutting tools, German patent, Number 523594, 1931
Table 2 gives 8 random experiment number to verify the model in formula (1).
Salomon, Process for machining metals of similar acting materials when being worked by cutting tools, German patent, Number 523594, 1931
Online since: April 2005
Authors: Alain Barbu, Frédéric Christien
Woo modified the usual expressions of the sink strengths of planar sinks (surfaces or grain
boundaries) and linear sinks (dislocation lines) so as to take the SIA diffusion anisotropy into
account [2].
dCni dt = [βi(n−1)C1i]C(n−1)i + [βv(n+1)iC1v + αi(n+1)i]C(n+1)i − [αini + βvniC1v + βiniC1i]Cni dC1i dt = G − RivC1iC1v − KidC1i − KisC1i − 2β1iC1iC1i + 2αi2iC2i + βv2iC1vC2i − C1i ∞X n=2 βiniCni − C1i ∞X n=2 βinvCnv + ∞X n=3 αiniCni (1) dC2i dt = βi1iC1iC1i − αi2iC2i − βi2iC1iC2i + αi3iC3i − βv2iC1vC2i + βv3iC1vC3i n is the number of monomers (vacancies or SIA) included in a cluster of size n, Cnθ is the concentration of the clusters of size n per unit volume (with θ = i for interstitials (SIA) and θ = v for vacancies), βθ0 nθC1θ0 is the frequency at which a cluster θ absorbs a defect θ0, αθnθ is the frequency at which a cluster θ emits a defect θ, Riv is the vacancy-SIA recombination rate, KθdC1θ is the absorption rate of the defects θ by the dislocation lines, KθsC1θ is the absorption rate of the defects θ by the surfaces.
G is the point defect creation rate, i.e. the number of Frenkel pairs (1 Frenkel pair = 1 vacancy + 1 SIA) created under electron irradiation per second and per cm3.
dCni dt = [βi(n−1)C1i]C(n−1)i + [βv(n+1)iC1v + αi(n+1)i]C(n+1)i − [αini + βvniC1v + βiniC1i]Cni dC1i dt = G − RivC1iC1v − KidC1i − KisC1i − 2β1iC1iC1i + 2αi2iC2i + βv2iC1vC2i − C1i ∞X n=2 βiniCni − C1i ∞X n=2 βinvCnv + ∞X n=3 αiniCni (1) dC2i dt = βi1iC1iC1i − αi2iC2i − βi2iC1iC2i + αi3iC3i − βv2iC1vC2i + βv3iC1vC3i n is the number of monomers (vacancies or SIA) included in a cluster of size n, Cnθ is the concentration of the clusters of size n per unit volume (with θ = i for interstitials (SIA) and θ = v for vacancies), βθ0 nθC1θ0 is the frequency at which a cluster θ absorbs a defect θ0, αθnθ is the frequency at which a cluster θ emits a defect θ, Riv is the vacancy-SIA recombination rate, KθdC1θ is the absorption rate of the defects θ by the dislocation lines, KθsC1θ is the absorption rate of the defects θ by the surfaces.
G is the point defect creation rate, i.e. the number of Frenkel pairs (1 Frenkel pair = 1 vacancy + 1 SIA) created under electron irradiation per second and per cm3.
Online since: November 2005
Authors: Ji Ho Song, Chung Youb Kim, Chang Seung Lee, Woo Seong Che, Sung Hoon Choa, Jun Hyub Park
Micro-Electro Mechanical Systems (MEMS) is a new manufacturing technology to make complex
electro-mechanical systems using batch fabrication processes at a relatively low cost while ensuring
the uniformity of a number of repetitive structures.
Fig. 3 is the allocation of specimen and Table 1 shows the size composition and numbers of specimen disposed on a wafer.
Johnson: Microtensile test of free-standing polysilicon fibers of various grain sizes, J.
Fig. 3 is the allocation of specimen and Table 1 shows the size composition and numbers of specimen disposed on a wafer.
Johnson: Microtensile test of free-standing polysilicon fibers of various grain sizes, J.
Online since: November 2005
Authors: Jae Do Kwon, Suk Chull Kang, Ho Sang Shin, Choon Yeol Lee, Seung Wan Woo
General
welding (Fig. 2 [a]) is carried out automatically,
where diameters of external and internal tracks and
total number of passes are 763mm, 753mm and 82,
respectively.
Repair welding (Fig. 2 [b]) is applied automatically up to 30mm depth from base metal surface, where treatment width and total number of passes are 13.2mm and 70, respectively.
Even though CAWH and CRWH after PWHT are a little bit different in grain size, there are not much differences in morphologic construction.
Repair welding (Fig. 2 [b]) is applied automatically up to 30mm depth from base metal surface, where treatment width and total number of passes are 13.2mm and 70, respectively.
Even though CAWH and CRWH after PWHT are a little bit different in grain size, there are not much differences in morphologic construction.
Online since: May 2012
Authors: Xiu Fen Li, Hui Qin Chen
number
cement(g)
nano kaolin (g)
Substitution rate
(%)
overall water demand (ml)
Water requirement (%)
1
500
0
0
140.00
28
3
495
5.00
1%
149.00
29.8
4
490
10.00
2%
161.00
32.2
5
485
15.00
3%
166.00
33.2
6
480
20.00
4%
173.00
34.6
7
475
25.00
5%
163.00
32.6
8
470
30.00
6%
167.00
33.4
9
465
35.00
7%
177.00
35.4
10
460
40.00
8%
181.00
36.2
11
455
45.00
9%
189.00
37.8
Cement setting time and final setting time were detected by national standard detection method, the water demand detection method is also by the national standard GB / T1346-2001《Test method for Standard consistency water needed, setting time and stability test》.
Tab.2 Setting time test results of cement mixed with nanometer kaolin number cement(g) nano kaolin (g) Substitution rate (%) Initial setting time Final setting time 1 500 0 0 3:32 4:46 3 495.00 5.00 1% 3:52 5:04 4 490.00 10.00 2% 4:35 6:01 5 485.00 15.00 3% 4:56 6:09 6 480.00 20.00 4% 4:58 6:12 7 475.00 25.00 5% 4:45 6:22 8 470.00 30.00 6% 4:50 6:08 9 465.00 35.00 7% 5:12 6:32 10 460.00 40.00 8% 5:26 6:52 11 455.00 45.00 9% 5:35 7:20 12 450.00 50.00 10% 5:54 7:44 note Cement and nano kaolin unit for g;Initial and final setting time units for h:min As you can see, with the increasing of the nano-kaolin, the initial setting time and final setting time are increased, and indicates that the nano-kaolin ash activity is not strong, is also a very good proof of the volcanic ash activity test.
These nanoscale subtle pore can use the nano kaolin grain to fill which have no enough time to participate in ash reaction , thus make cement stone density increase, micro structure improve, and increase its strength.Compared with ordinary ore, kaolin nanoparticles in the early filling effect is good[4].
Tab.2 Setting time test results of cement mixed with nanometer kaolin number cement(g) nano kaolin (g) Substitution rate (%) Initial setting time Final setting time 1 500 0 0 3:32 4:46 3 495.00 5.00 1% 3:52 5:04 4 490.00 10.00 2% 4:35 6:01 5 485.00 15.00 3% 4:56 6:09 6 480.00 20.00 4% 4:58 6:12 7 475.00 25.00 5% 4:45 6:22 8 470.00 30.00 6% 4:50 6:08 9 465.00 35.00 7% 5:12 6:32 10 460.00 40.00 8% 5:26 6:52 11 455.00 45.00 9% 5:35 7:20 12 450.00 50.00 10% 5:54 7:44 note Cement and nano kaolin unit for g;Initial and final setting time units for h:min As you can see, with the increasing of the nano-kaolin, the initial setting time and final setting time are increased, and indicates that the nano-kaolin ash activity is not strong, is also a very good proof of the volcanic ash activity test.
These nanoscale subtle pore can use the nano kaolin grain to fill which have no enough time to participate in ash reaction , thus make cement stone density increase, micro structure improve, and increase its strength.Compared with ordinary ore, kaolin nanoparticles in the early filling effect is good[4].
Online since: December 2013
Authors: Yong Liu, Le Bin Yin, Liang Zhong Zhao, De Yong Zhang, Song Bai Zhang, Kai Xiao
According to Singh et al. [3] weeds can reduce the grain yield of dry-seeded paddy by 75.8%, wet seeded paddy by 70.6% and transplanted paddy by 62.6%.
A 1425-bp fragment of the 16S rRNA of strain S5-1 was sequenced and the sequence was deposited in the Genebank database under accession number GQ429218.
The GeneBank accession numbers for each bacteria used in the analysis is shown in parentheses.
A 1425-bp fragment of the 16S rRNA of strain S5-1 was sequenced and the sequence was deposited in the Genebank database under accession number GQ429218.
The GeneBank accession numbers for each bacteria used in the analysis is shown in parentheses.
Online since: June 2018
Authors: Martin Vyšvařil, Michaela Hegrová, Tomáš Žižlavský
Increasing number of coarse pores can lead to higher frost resistance of mortar, better accumulation of salts and better water vapour permeability.
Materials The fine grained mortars consisted of commercial-hydrated lime powder (CARMEUSE CZECH REPUBLIC, s.r.o.) of the class CL90 S according to EN 459-1, normalized siliceous sand (EN 196-1, with constant granulometry ≤0.5 mm) and one of the CEs.
In lime-based mortars, the extremely large amount of Ca(OH)2 crystals would provide a huge number of points where the CEs could be adsorbed, thus decreasing the entanglement between different chains and producing a drop in viscosity.
Materials The fine grained mortars consisted of commercial-hydrated lime powder (CARMEUSE CZECH REPUBLIC, s.r.o.) of the class CL90 S according to EN 459-1, normalized siliceous sand (EN 196-1, with constant granulometry ≤0.5 mm) and one of the CEs.
In lime-based mortars, the extremely large amount of Ca(OH)2 crystals would provide a huge number of points where the CEs could be adsorbed, thus decreasing the entanglement between different chains and producing a drop in viscosity.
Online since: February 2020
Authors: Qun Hu Xue, Yi Jun Liu, Li Min Pan, Li Biao Xiao, Dian Zhang
Acknowledgements
This work was supported by the National Natural Science Foundation of China, grant number 51372193 and the Natural Science Basic Research Program of Shannxi province, grant number 2014JM6224.
Ding, Effects of the precipitation of stabilizers on the mechannism of grain fracturing in a zirconia metering nozzle, Int.
Ding, Effects of the precipitation of stabilizers on the mechannism of grain fracturing in a zirconia metering nozzle, Int.
Online since: July 2020
Authors: Francesco La Via, Peter J. Wellmann, Marcin Zielinski, Marco Mauceri, Michael Schöler, Philipp Schuh, Johannes Steiner, Manuel Kollmuss
Additionally, the samples were polished with a diamond solution with ¼ µm grain size to reduce contamination on the growth front introduced by the merging process.
In order to grow thick 3C-SiC material and to study the impact of the necessary supersaturation that keeps the cubic polytype stable, we have carried out a number of growth experiments and simulations in which the source-to-seed distance was varied between 0.75 mm, 2 mm and 3 mm, respectively.
Acknowledgments This work is funded by the European H2020 framework program for research and innovation under grant agreement number 720827 (CHALLENGE).
In order to grow thick 3C-SiC material and to study the impact of the necessary supersaturation that keeps the cubic polytype stable, we have carried out a number of growth experiments and simulations in which the source-to-seed distance was varied between 0.75 mm, 2 mm and 3 mm, respectively.
Acknowledgments This work is funded by the European H2020 framework program for research and innovation under grant agreement number 720827 (CHALLENGE).