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Online since: January 2014
Authors: Ji Qi, Guan Gran Sun, Chen Niu, Bin Zhao, Naisen Yu
By comparing the results with V2O5 standard JCPDS card (PDF ID number 41-1426) of XRD data documents, there were no impurity peaks to be found in the diffraction pattern.
By comparing the results with standard JCPDS card (PDF ID number 43-1051) of XRD data documents, the product sample was a match to monoclinic phase group C2/m with lattice constants a = 5.743Å , b = 4.517Å, and c = 5.375Å.
Scanning electron microscope (SEM) results showed that the grain size distribution of the VO2 nanocrystal is mainly in rod-like and block-like as seen in Fig. 3.
By comparing the results with standard JCPDS card (PDF ID number 43-1051) of XRD data documents, the product sample was a match to monoclinic phase group C2/m with lattice constants a = 5.743Å , b = 4.517Å, and c = 5.375Å.
Scanning electron microscope (SEM) results showed that the grain size distribution of the VO2 nanocrystal is mainly in rod-like and block-like as seen in Fig. 3.
Online since: February 2014
Authors: Jin Huan Zhang, Hong Li Zhang
(4)
Where, The symbols of Nd is the number of dynamic and effective grinding in grinding zone; The symbols of is the average tangential grinding force in TUAG; The symbols of is the average normal grinding force in TUAG.
The grains of CBN grinding wheel are 140#, the density is 100% and the diameter is Ø50 mm.
Tabel 1 Test factors and levels Test number Grinding wheel speed n/(r·min-1) Workpiece speed vw/(mm·min-1) Grinding depth ap/mm 1 3000 150 0.005 2 4500 200 0.010 3 6000 350 0.015 4 7500 400 0.020 Analysis of Experiment Results.
The grains of CBN grinding wheel are 140#, the density is 100% and the diameter is Ø50 mm.
Tabel 1 Test factors and levels Test number Grinding wheel speed n/(r·min-1) Workpiece speed vw/(mm·min-1) Grinding depth ap/mm 1 3000 150 0.005 2 4500 200 0.010 3 6000 350 0.015 4 7500 400 0.020 Analysis of Experiment Results.
Online since: February 2014
Authors: Miao Wu, Xue Di Hao, Fu Yan Lv, Zheng Meng Xia, Jie Gao
Introduction
High concentrations and viscous solid wastes refer to solid-liquid two-phase wastes or byproducts with high solid content, viscosity, and fine grain size, which are produced in industry and municipal sewage treatment processes.
Suspensions are also prevalent in a number of natural settings such as debris flow, lava flow, and flood waves carrying extremely high concentration of sediments [2].
Apparent wall slip of particles is one such phenomenon and this has attracted large number of studies [3][4].
Suspensions are also prevalent in a number of natural settings such as debris flow, lava flow, and flood waves carrying extremely high concentration of sediments [2].
Apparent wall slip of particles is one such phenomenon and this has attracted large number of studies [3][4].
Online since: July 2010
Authors: Xiao Yong Zhang, Hui Lin Gao, Ling Kang Ji, Chuang Jing Zhuang
With the increase of the deformation, a large number of dislocations move along the slip surface, and
form dislocation tangles in the grain boundaries, lath boundaries and precipitated particles Fig.8
shows the dislocation cellular substructure under 6% prestrain.
The results show that, with the increase of strain, the number of cellular substructure increased and the size of cellular decreased, causing increase of strength and drop of plasticity and toughness.
The results show that, with the increase of strain, the number of cellular substructure increased and the size of cellular decreased, causing increase of strength and drop of plasticity and toughness.
Online since: August 2014
Authors: Li Zhi Gu, Sheng Jun Wei
Such wear will cause grain waste that located on the sides of the bead.
Of course, in practice the real number of the types may not be that high, but it at least provides smart clues and gross combinations for new types of DBWs with new features.
By observing and utilizing the spectrum, a great number of new types of DBW with novel combinations of different components may be designed and produced for even better and wider applications.
Of course, in practice the real number of the types may not be that high, but it at least provides smart clues and gross combinations for new types of DBWs with new features.
By observing and utilizing the spectrum, a great number of new types of DBW with novel combinations of different components may be designed and produced for even better and wider applications.
Online since: December 2010
Authors: Tian Lai Yu, Xing Guo Liu, Hong Xiang Zhang
Table 1 Properties of Steel
Name of the components
Steel specification
Thickness
(mm)
Yield strength
(MPa)
Tensile
Strength
(MPa)
Elongation(%)
Modulus of elasticity(MPa)
Temperature
coefficient
Mass Density
(kg/m3)
Steel plate
Q345q
14
345
510
21
2.06×105
12×10-6
7850
Bolt
45
——
355
600
16
Table 2 Properties of Glue
Name
Value
Tensile strength( MPa)
≥30
Yielding strength( MPa)
≥45
Compressive strength( MPa)
≥65
Modulus of elasticity( MPa)
≥3.6 × 103
elongation(%)
≥1.5
Table 3 Properties of Silicon Carbide
Mesh
Grain diameter()
Moh's hardness
Specific gravity (g/cm3)
8~320
3500~25
8
3.98
Experiment assembly.
The equation for skid resistance coefficient is given by: (1) Where:——slippage load tested from experiment (KN); ——number of interfaces; ——measured value of bolt preload on one-side (KN); ——number of bolts on one side.
The equation for skid resistance coefficient is given by: (1) Where:——slippage load tested from experiment (KN); ——number of interfaces; ——measured value of bolt preload on one-side (KN); ——number of bolts on one side.
Online since: September 2012
Authors: Yi Huang, Feng Miao, Jian Ma
Microwave sintering has many advantages, such as rapid heating rate, lower sintering temperature, enhanced densification, smaller average grain size, short processing time, low power requirement and so on [15].
Theoretical calculation and discussion In the γ-LiAlO2:Co3+ ceramic, the oxygen ions can form tetrahedrons with Co3+ ions which substitute the Al3+ in tetrahedral centers, and the coordination number of oxygen is four.
Local structural parameters of γ-LiAlO2:Co3+ (Ref. 19: ,,) Ligand numbers 1 2 3 4 Co-O bond lengths , , , which are shown in Table 1.
Theoretical calculation and discussion In the γ-LiAlO2:Co3+ ceramic, the oxygen ions can form tetrahedrons with Co3+ ions which substitute the Al3+ in tetrahedral centers, and the coordination number of oxygen is four.
Local structural parameters of γ-LiAlO2:Co3+ (Ref. 19: ,,) Ligand numbers 1 2 3 4 Co-O bond lengths , , , which are shown in Table 1.
Online since: October 2013
Authors: Wei Na Xue, Yan Bo Peng
The mycelium of such filamentous fungi as A.niger, used for manufacturing citric acid glucoamylase, is found to has high adsorption ability toward many metal cations because of a large number of chemically active hydroxyl and amino groups, high hydrophilicity, and flexible polymer chains on the cell wall that make fungi mycelium compatible with the adsorption of metal ions.
As shown in the figure, the percentage removal increased with the increase of biosorbent dose before 20g/L, this is due to the increased surface area of the biosorbent, which in turn increases the number of binding sites.
The higher biosorbent loading could produce a ‘screen’ effect on the cell wall, protecting the binding sites, thus resulting in lower As3+ ions adsorption per unit of sorbent may be due to the adsorbent overlap and polymerization, adsorbent grain size increases, the relative surface area is reduced, or effective adsorption sites decreases,so adsorption rate to decrease.
As shown in the figure, the percentage removal increased with the increase of biosorbent dose before 20g/L, this is due to the increased surface area of the biosorbent, which in turn increases the number of binding sites.
The higher biosorbent loading could produce a ‘screen’ effect on the cell wall, protecting the binding sites, thus resulting in lower As3+ ions adsorption per unit of sorbent may be due to the adsorbent overlap and polymerization, adsorbent grain size increases, the relative surface area is reduced, or effective adsorption sites decreases,so adsorption rate to decrease.
Online since: October 2014
Authors: Emi Zurima Bt Ismail, Nuriziani Hussin, Dina Maizana
This transformer consists of 254 turns for both primary and secondary winding. 3% SiFe Cold Rolled Grain Oriented, (CRGO) M5 is used as core lamination and total number of layer is 35.
The equation used to get the input voltage is shows below: V = 4.44 x B x N x f x A (2) Where: V = Voltage, 4.44 = Constant, B = Flux density (Tesla), N = Number of winding turn = 254 turns, f = Frequency = 50 Hz Table 1 shows the calculation result by using Equation 2 for input voltage from 0.2T until 2.0T at 50 Hz.
The equation used to get the input voltage is shows below: V = 4.44 x B x N x f x A (2) Where: V = Voltage, 4.44 = Constant, B = Flux density (Tesla), N = Number of winding turn = 254 turns, f = Frequency = 50 Hz Table 1 shows the calculation result by using Equation 2 for input voltage from 0.2T until 2.0T at 50 Hz.
Online since: August 2013
Authors: Xing Li Zhang, Peng Tian, Wei Jun Hui, Rui Guo Bai, Zhi Yong Zhong, Hai Gao, Fu Xing Guo
Deformation results in increased material deformation stored energy ( ΔGD ) mainly including the rise of the dislocation density, the increase of vacancy and the grain boundary energy of unit volume.
Fig.5 shows the quadratic fitting relationship between ΔGD and InZ, ΔGD ranged from 10-50 J/mol, deformation stored energy increases with increasing Z, then established a quadratic fitting expression as follows: ΔGD=295.4-16.2(InZ)+0.22(InZ)2 (9) Fig. 5 and Eq. 9 implied that the value of first partial derivative for lnZ was a positive number and the value of secondly partial derivative for lnZ was also a positive number.
Fig.5 shows the quadratic fitting relationship between ΔGD and InZ, ΔGD ranged from 10-50 J/mol, deformation stored energy increases with increasing Z, then established a quadratic fitting expression as follows: ΔGD=295.4-16.2(InZ)+0.22(InZ)2 (9) Fig. 5 and Eq. 9 implied that the value of first partial derivative for lnZ was a positive number and the value of secondly partial derivative for lnZ was also a positive number.