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Online since: May 2011
Authors: Bai Yang Lou, Xiao Li, Xiao Dong He, Li Ma
In order to obtain the electrical steel with homogeneous silicon distribution and small grain size, the electrical steel was processed by high temperature rapid thermal annealing.
Table 1 Fe configurations of the electrical steel Fe sites Number of Si atoms in the nearest neighbor shell Number of Si atoms in the next nearest neighbor shell Ⅰ 0 0 Ⅱ 0 1-2-3-4-5-6 Ⅲ 1 0-1-2-3-4-5-6 Ⅳ 2 0-1-2-3-4-5-6 Ⅴ 3 0-1-2-3-4-5-6 Ⅵ 4 0-1-2-3-4-5-6 Table 2 Mössbauer parameters of as-prepared, as-annealed and as-rolled samples Samples Assigned subspectrum Δ[mm/s] △[mm/s] H [Koe] Γ [mm/s] Area ratio [%] As-prepared Ⅰ 0.04 0.06 333 0.14 12.6 Ⅱ 0.04 0.00 319 0.22 38.2 Ⅲ 0.06 -0.02 302 0.20 13 Ⅳ 0.09 -0.00 284 0.20 16.6 Ⅴ 0.21 0.02 249 0.20 14.2 Ⅵ 0.29 -0.05 196 0.20 5.4 As-annealed Ⅰ 0.08 0.02 330 0.19 14.1 Ⅱ 0.06 -0.00 317 0.21 34.2 Ⅲ 0.02 -0.00 299 0.20 14 Ⅳ 0.11 -0.00 281 0.20 21.2 Ⅴ 0.18 -0.00 240 0.20 16.5 As-rolled Ⅰ 0.06 0.10 330 0.19 15.2 Ⅱ 0.06 0.00 316 0.21 32.9 Ⅲ 0.03 -0.01 297 0.20 15.1 Ⅳ 0.10 -0.02 279 0.20 22.1 Ⅴ 0.19 -0.00 239 0.20 14.7 Table 3 The measured values of Fe site occupancies of the samples and theoretic results for random, B2 and DO3 at 13 at
Table 1 Fe configurations of the electrical steel Fe sites Number of Si atoms in the nearest neighbor shell Number of Si atoms in the next nearest neighbor shell Ⅰ 0 0 Ⅱ 0 1-2-3-4-5-6 Ⅲ 1 0-1-2-3-4-5-6 Ⅳ 2 0-1-2-3-4-5-6 Ⅴ 3 0-1-2-3-4-5-6 Ⅵ 4 0-1-2-3-4-5-6 Table 2 Mössbauer parameters of as-prepared, as-annealed and as-rolled samples Samples Assigned subspectrum Δ[mm/s] △[mm/s] H [Koe] Γ [mm/s] Area ratio [%] As-prepared Ⅰ 0.04 0.06 333 0.14 12.6 Ⅱ 0.04 0.00 319 0.22 38.2 Ⅲ 0.06 -0.02 302 0.20 13 Ⅳ 0.09 -0.00 284 0.20 16.6 Ⅴ 0.21 0.02 249 0.20 14.2 Ⅵ 0.29 -0.05 196 0.20 5.4 As-annealed Ⅰ 0.08 0.02 330 0.19 14.1 Ⅱ 0.06 -0.00 317 0.21 34.2 Ⅲ 0.02 -0.00 299 0.20 14 Ⅳ 0.11 -0.00 281 0.20 21.2 Ⅴ 0.18 -0.00 240 0.20 16.5 As-rolled Ⅰ 0.06 0.10 330 0.19 15.2 Ⅱ 0.06 0.00 316 0.21 32.9 Ⅲ 0.03 -0.01 297 0.20 15.1 Ⅳ 0.10 -0.02 279 0.20 22.1 Ⅴ 0.19 -0.00 239 0.20 14.7 Table 3 The measured values of Fe site occupancies of the samples and theoretic results for random, B2 and DO3 at 13 at
Online since: April 2007
Authors: Xiao Ning Zhang, Fan Yong Ran, Yan Hong Li, Wen Bin Cao
Both the grain sizes of the N-doped and non-doped TiO2 powders were about 20 nm
and 11 nm respectively by Scherrer's method.
It indicates that the number of bacterial plagues decreases quickly with the elapsing of time.
The grant number is 50472094.
It indicates that the number of bacterial plagues decreases quickly with the elapsing of time.
The grant number is 50472094.
Online since: January 2012
Authors: T.D. Mercy, S. Aravamuthan, G. Balachander, K.P. Kamalakaran, Rahul Sharma, V.F. Kaladharan
Table-1 Brinell hardness values
Positions on the bottom of extruded can (Fig.5)
Brinell hardness number
Required Brinell hardness number
A1
55
40
A2
54
A3
52
A4
54
The hardness values show that uniform properties have been achieved throughout the bottom of the can and confirm to the required temper condition.
3.2 Tensile Properties: Extruded cell-can has been cut and standard tensile samples were fabricated as per the standard ASTM B-557 for tensile property evaluation.
Figure 6 shows the optical photomicrograph which reveals the stretched grains and precipitate of Al6 (MnFe).
Figure 6 shows the optical photomicrograph which reveals the stretched grains and precipitate of Al6 (MnFe).
Online since: October 2012
Authors: Juan Ping Wang
Fig. 3 The circuit of the L—light emitting diode Q—photosensitive diode
photoelectric sensor A—seed tube B—corn grain
Fig. 4 The compare of the number of the fixed sensor
Photoelectric Sensor Installation.
As shown in figure 8, ADC0809 was a successive approximation 8 bit A / D conversion chip, and had 8 analog input channels of IN0~IN7, Each channel had an address which was selected by the channel selection lines ADDA,ADDB and ADDC, Because A / D chip was equivalent to a peripheral chips in the system, there was taken P2.7 low level as a chip select signal, then the 8 channel’s address number of IN0~IN7 were 7FF8H~7FFFH.When P2.7 and could match, using the drop edge to make START and ALE signal into a high level to latch the address signal.On the rising edge START signal from high level to low level that started A / D conversion.
As shown in figure 8, ADC0809 was a successive approximation 8 bit A / D conversion chip, and had 8 analog input channels of IN0~IN7, Each channel had an address which was selected by the channel selection lines ADDA,ADDB and ADDC, Because A / D chip was equivalent to a peripheral chips in the system, there was taken P2.7 low level as a chip select signal, then the 8 channel’s address number of IN0~IN7 were 7FF8H~7FFFH.When P2.7 and could match, using the drop edge to make START and ALE signal into a high level to latch the address signal.On the rising edge START signal from high level to low level that started A / D conversion.
Online since: June 2021
Authors: Yu Qing Zhang, Lu Yan Wang, Cao Bing Li, Shan Yu Liu
By contrast, when the raw powder was treated by jet classification, the number of holes in tungsten products decreased significantly.
It was analyzed that the raw powders which didn’t pretreated through jet grading contained a large number of large agglomerated particles and fine particles.
References [1] Yucheng Wu, Qingqing Hou, Laima Luo, Preparation of ultrafine-grained/nanostructured tungsten materials: An overview, Journal of Alloys and Compounds. 779(2019) 926–941
It was analyzed that the raw powders which didn’t pretreated through jet grading contained a large number of large agglomerated particles and fine particles.
References [1] Yucheng Wu, Qingqing Hou, Laima Luo, Preparation of ultrafine-grained/nanostructured tungsten materials: An overview, Journal of Alloys and Compounds. 779(2019) 926–941
Online since: January 2016
Authors: Rosliza Sauti, Bakar Meh, Nurazilah Mohd Zainon, Noorsyakirah Abdulah, Mohd Afian Omar, Norazlan Roslani, Mohd Nizam Abdul Jalil, Ahmad Zahid Omar
The speed was then adjusted to the desired value and the revolution counter (or equivalent) was set to the desired number of revolutions.
Finally the test was stopped when the desired number of revolutions is achieved.
WHEN THE CO BASED ALLOY IS SINTERED, ITS GRAIN BOUNDARIES WILL CHANGE DUE TO THE TEMPERATURE EFFECT.
Finally the test was stopped when the desired number of revolutions is achieved.
WHEN THE CO BASED ALLOY IS SINTERED, ITS GRAIN BOUNDARIES WILL CHANGE DUE TO THE TEMPERATURE EFFECT.
Online since: May 2012
Authors: Liang Chen, Zheng Qing Wang, Yan Shi Xie, Wei Huang
Warm and humid climatic conditions in which the ancient terrestrial plants and aquatic life in lakes of high productivity, but because of basin subsidence in a stable phase of the early basin size is limited, detrital mineral handling short distance, resulting in sediment grain size is relatively thick, deposited mainly silty mudstone and muddy siltstone.
At the same time a large number of freshwater input, making the lake water salinity is low, carbonate is more difficult to settle down, and the corresponding low carbonate content.
At this point the lake caused by strong evaporation and further concentrated, resulting in a large number of carbonate precipitation, showing a high content of carbonate, or limestone, marl deposition.
At the same time a large number of freshwater input, making the lake water salinity is low, carbonate is more difficult to settle down, and the corresponding low carbonate content.
At this point the lake caused by strong evaporation and further concentrated, resulting in a large number of carbonate precipitation, showing a high content of carbonate, or limestone, marl deposition.
Online since: November 2011
Authors: Yan Lin Chen, Ying Chang, Jiu Xin Jiang, Ming Yan
At 800℃ and 900℃, the specific mass grains of A and B are relatively small, curve (a) and curve (d) coincided, curve (b) and curve (e) coincided.
Fig. 1 Weight gain per unit area as a function of number of cycles for A and B cyclically oxidized, (a)A800℃, (b)A900℃, (c)A1000℃, (d)B800℃, (e)B900℃, (f)B1000℃ Fig. 2 The corresponding weight gains squared as a function of numbers of cycles for A and B, (a)A800℃, (b)A900℃, (c)A1000℃, (d)B800℃, (e)B900℃, (f)B1000℃ Phase composition and microstructure of oxide product.
Fig. 1 Weight gain per unit area as a function of number of cycles for A and B cyclically oxidized, (a)A800℃, (b)A900℃, (c)A1000℃, (d)B800℃, (e)B900℃, (f)B1000℃ Fig. 2 The corresponding weight gains squared as a function of numbers of cycles for A and B, (a)A800℃, (b)A900℃, (c)A1000℃, (d)B800℃, (e)B900℃, (f)B1000℃ Phase composition and microstructure of oxide product.
Online since: June 2005
Authors: Bo Young Hur, Soo Wohn Lee, Ho Seob Kim, Eun Ah Lee, Huang Chen, Tae Ho Kim, Ho Sung Aum, Jae Heyg Shin
Since Fujishima first discovered the
photooxidation of water by TiO2 electrodes [1], a large number of applications of TiO2 in
photocatalytic technology have been developed [2].
Compared with the 90%TiO2-10%CeO2 coating and the 90%TiO2-10%SnO2 coating, many grains on the surface of the 90%TiO2-10%ZnO coating has grown up to 100nm as can be seen from Fig. 2a.
It was reported that TiO2 photoactivity was proportional to the number of hydroxyl groups on its surface [5].
Compared with the 90%TiO2-10%CeO2 coating and the 90%TiO2-10%SnO2 coating, many grains on the surface of the 90%TiO2-10%ZnO coating has grown up to 100nm as can be seen from Fig. 2a.
It was reported that TiO2 photoactivity was proportional to the number of hydroxyl groups on its surface [5].
Online since: January 2010
Authors: Xiang Zhong Ren, Pei Xin Zhang, Dong Yun Zhang, Li Gao, Qiu Hua Yuan, Hai Lin Peng
At 1350 °C, as the crystallization continued to
increase, a large number of crystal phases were arranged regularly and closely, crowding out mostly
the interspaces within the microporous materials, which led to comparatively low porosity, high
tightness density and flexural strength.
Up to 1355 °C, although the crystallization increased, the grains grew rapidly, arraying randomly and even agglomerating, the aperture also grew, which made the porosity rise, therefore the density and flexural strength was both reduced. 1320 1330 1340 1350 1360 100 150 200 250 sintering temperature/℃ flexural strength /MPa 3.3 Influence on internal structure with sintering temperatures Fig.5 and Fig.6 show the changes in the micropores inside the material with the sintering temperatures.
As the temperature rises to 1350 °C, a large number of small granular α-cordierites arise, and distribute randomly throughout the material inside, while the glass phase nearly disappears.
Up to 1355 °C, although the crystallization increased, the grains grew rapidly, arraying randomly and even agglomerating, the aperture also grew, which made the porosity rise, therefore the density and flexural strength was both reduced. 1320 1330 1340 1350 1360 100 150 200 250 sintering temperature/℃ flexural strength /MPa 3.3 Influence on internal structure with sintering temperatures Fig.5 and Fig.6 show the changes in the micropores inside the material with the sintering temperatures.
As the temperature rises to 1350 °C, a large number of small granular α-cordierites arise, and distribute randomly throughout the material inside, while the glass phase nearly disappears.