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Online since: July 2023
Authors: Budhy Kurniawan, Trians Aprilianto, Dicky Rezky Munazat, Maykel Manawan
The average grain size based on SEM characterization is larger than the W-H calculation.
The formation of Mn3+-O2--Cr3+ interactions can occur because Cr3+ has the same number of electrons (isoelectronic) as Mn4+ (3d3, t32g↑ e0g↑) ions [10].
Online since: October 2012
Authors: Rengapillai Subadevi, P. Prahasini, Fu Ming Wang, Marimuthu Sivakumar
From the diffraction pattern, it is observed that the sample has α-NaFeO2 structure with R3m space group [JCPDS file number: 500653] which depicts the layer structure of LiCoO2 [6].
The particles with an average grain size of 150 nm are distributed inhomogenously and well dispersed without any agglomeration.
Online since: October 2017
Authors: Zakaria Azmi, Mohamed Kamari Halimah, Abdul Halim Shaari, Laoding Hasnimulyati, Mansor Ishak
Introduction Glass materials have attracted the attention of many research due to their properties, which are different as compared to crystalline materials, such as isotropic conduction, absence of grain boundaries, ease of fabrication into complex shapes, wide compositional flexibility, and high ionic coupled with low electronic conductivity [1].
Atomic ring size was calculated based on the value of the first order stretching force constant and coordination number of each chemical oxide used in the experiment and also bulk modulus of the glasses.
Online since: August 2009
Authors: Ya Li Hou, Bing Heng Lu, Chang He Li, Yu Cheng Ding
A number of researchers have described relationships between factors affecting the performance of the delivery grinding fluid to grinding zone.
The grinding wheel is a porous solid disk consisting of abrasive grain, bond materials and pores of irregular shapes and different sizes.
Online since: December 2006
Authors: De Jin Hu, Da Ping Wan, Hai Feng Wang, Yong Hong Zhang
The digital image processing is performed in the detection thread to estimate the amount of wear, which decides the dressing depth to remove the worn abrasive grain.
Table 1 Experimental conditions Parameters Value/Specification Model of Machine MD9040 Number of control axis 6 Grinding method Dry point-grinding Grinding wheel 1A1/T2 200×6×32×4 MBD3 120/140 M75 CCD camera COSTAR M3501/2" B&W 752™582 Diamond dresser Single-point diamond tool Accelerometer 333B32 (PCB)
Online since: December 2010
Authors: Zhi Yong Ji, Jun Sheng Yuan, Fei Li, Hui Ru Han
A great number of zeolite structures without natural counterpart have been constructed by human beings.
The results of the test show that the permeation ratio of N2 through the membrane was 0 before calcined, for the templates has filled the channels of zeolite membrane and the gaps between crystal grains.
Online since: May 2012
Authors: Zhong Shan Shen, Bai Quan Yan, Hong Qing Kang, Long Wang
It is distinguished by significant sedimentary characteristics of offshore interdistributary mud and offshore distributary channel, the main features: offshore interdistributary is characterized by relative small number of thin sand, thick layer of pure purple, mottled, gray-green, massive bedding, calcium tables, root, wormhole, less animal fossils.
As shown in fig.1-(b), silty mudstone is above the weak flooded fine-grained sandstone.
Online since: January 2005
Authors: Dezső L. Beke, S. Szabó, R. Juhász, Z. Kátai, F. Bakos
For getting useable circuit parameters (e.g. number of secondary turns on the core) at least a medium permeability level is necessary (~ 100.000 at 50Hz).
Understanding of the relationship between microstructure and magnetic parameters requires more detailed investigations because the results cannot be explained by simple grain size or internal stress effect: the most important changes in the magnetic parameters could be detected after the amorphous-nanocrystalline transformation seemed to be finished.
Online since: May 2011
Authors: Da Guang Li, Zhi Wu, Chun Yang Pan, Wei Qin Fu, Qiu Hong Wang
In 3Y-TZP, the grain size must be less than 0.8 and 0.3μm to attain 100%tetragonality in air and in hot (200-300˚C) humid atmosphere respectively.
Nano-sized powders of Zirconia-based ceramics have been synthesised through various wet chemical methods such as sol-gel synthesis[3], polymeric precursor route[4], combustion synthesis[5], hydrothermal treatment[6] and co-precipitation from metal aqueous solutions[7], which are difficult to control the powder size because of during wet chemical processing of the preparation, gels of zirconium hydroxide are interlinked three dimensionally through the oxo- and the hydroxyl bridging and there is entrapment of a large number of water molecules within this gel network.
Online since: July 2011
Authors: Liang Fan, Xiao Jin Song, Yu Zhen Zhang
Table 3 Aggregates physical index Tests Value Requirement[5] crushing index[% ] 7.2 ≤26 Soundness[%] 1 ≤12 Acicular and flaky grain in aggregate[%] 4.6 ≤15 Polished stone value 46 ≥42 Los Angeles abrasion[% ] 9.1 ≤30 The same aggregate gradation as shown in Fig.1 was used in all different modified asphalt pavement evaluation, and specimen fabrication and determination of the optimum asphalt content were based on the standard Marshall Compaction test (JTJ 052-2000).
These specimens are cylindrical, with diameter of 101.6 mm, height of 63.5 mm, compacted with double 50 numbers.
Showing 25331 to 25340 of 28673 items