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Online since: January 2009
Authors: Bai Xiang Ren, Hong Hui Teng
The results show that the process of phase transfer of TiO2 from anatase to rutile was promoted by doping Fe, 1.5% Fe 3+-doped TiO2 nanoparticles formed many defects at grain boundaries, inhibited effectively the recombination of the photoproduced e-/h+, improved the efficiency of photons, enhanced the absorbing water function of catalyst, and 1.5% Fe 3+-doped TiO2 revealled strongly absorption in UV and widened obviously absorption in Vis.
Since the radius Fe 3+ and Ti4+ for coordination number 6 are 0.79A and 0.75A, respectively[11], it is easy for Fe 3+ ions to cooperate with the matrix of the TiO2 particles without causing a significant crystalline distortion.
Red shift associated with the presence of iron ions can be attributed to a charge tran- sfer transition between the iron ions electrons and the TiO2 conduction or Fig.2 TEM micrographs of TiO2 and Fe 3+-TiO2 (A-pure TiO2; B-0.25%; C-0.50%; D-1.00%; C-1.50%; D-2.00%) C B A D E F 200 300 400 500 600 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0.00%-(1) 0.25%-(2) 0.50%-(3) 1.00%-(4) 1.50%-(5) 2.00%-(6) 5 3 2 1 Absorbance Wavelenth / (nm) 4 6 Fig.3 UV-Vis spectra of TiO2 and F3+-TiO2 4000 3500 3000 2500 2000 1500 1000 500 2.00%-(1)Fe-TiO2 0.50%-(2)Fe-TiO2 0.00%-(3)TiO2 0.50%-(4)Fe-TiO2 1.50%-(5)Fe-TiO2 1.00%-(6)Fe-TiO2 T% Wave number/cm-1 6 2 5 3 1 4 Fig.4 FT-IR spectra of TiO2 and Fe 3+ -TiO2 valence band [14].
Online since: April 2012
Authors: Halima Chemani
Waste is used as additive in the production of a certain number of products.
Thus, number of industries uses it in the manufacture of various materials.
Increasing resistance of ceramic materials - glass is especially a result of their finesse grain and uniform microstructure.In the mixtureVIII there is a decrease in rate of 50% feldspath,this seems to be very interesting at the industriel level.
Online since: July 2012
Authors: Shu Xia Li, Shi Huan Qin
And the concept of "Industrial economic belt of high-grade highways" was introduced in the General Introduction of Industrial-economic belt of high-grade highways and development along the Yangtze River in Jiangsu Province [3], and its specific function and role profiles of was discussed, and on this basis, a number of targeted recommendations has been made for future development of Industrial-economic belt along the Yangtze River in Jiangsu Province with practice.
At this stage,the decrease in the number of geographical latent region was taken as the principal thing ,the amount of the regions was considerable and started decreasing, growing region began to appear and the number of diffusion regions kept the same. 2) Growth Stage Since Harbin-Daqing freeway opened to Public,agricultural industry structure of the towns along it has undergone tremendous changes.
The main features of this stage is the appearance of the diffusion region and the disappearance of latent types, as well as the decrease or even the disappearance of the output types, and teemed with a large number of growth types whose rate of increase slows down.
Zhaodong Focus on the development of the biotechnology industry and agricultural products, grain deep-based Chinese herbal medicine deep processing industry.
Figure 1 Changes of gross industrial production along Harbin-Daqing-Qiqihar Industry Corridor and in the project area It can be seen from Figure 1, since the construction of Harbin-Daqing-Qiqihar Industry Corridor the number of enterprises relying on convenient transportation conditions provided by Harbin-Daqing freeway increased with continuous expansion of the construction scale.
Online since: September 2016
Authors: S.P. Samoilov, A.O. Cherniavsky
Two numbers of force-controlled cycles N1 = 50 and N2 = 500 were specified for work softening tests.
If specimen fractured within the specified number of cycles, the test was treated as LCF-test and used for fatigue curve determination.
Tensile strength under monotonic loading may be treated as a fracturing maximum stress with unit number of cycles.
Also it was assumed that residual tension strength decreases linearly through the number of cycles due to damage accumulation.
Ciulik, Creep and Dynamic Abnormal Grain Growth of Commercial-Purity Molybdenum: Ph.D.
Online since: March 2020
Authors: De Cai Mi, Qiong Yao Ye, Guan Hua Sun, De Qiang Chen, Jun Hui Luo
It can be seen that there are a large number of thin pages on the surface of the carbonaceous mudstone, and the arrangement is tight but the order is not uniform, resulting in a large number of voids on the entire surface.
The crystal is to form a agglomerate, which is unevenly arranged, and there are a large number of gaps between the agglomerates, and the structure is poor.
The flakes are joined by face, the thickness of the flakes is substantially the same, but the length is different, resulting in a large number of voids on the rock surface.
The compactness is general and the crystal grains are rare.
Indoor wax seal method to measure density results Sample serial number 1 2 3 4 Average density (g/cm3) 2.66374 2.72924 2.69066 2.77247 Table 3 shows the density measurement results of the laboratory wax seal method.
Online since: May 2012
Authors: Lei Liu, Guo Hua Wang, Xu Guang Wang, Hanglong Wang
No.2. when the floors are replaced by flange and sealing head. advantage: Having good relief performance; disadvantage:Relatively complex structure, more need to welding position, the number of repeat use is limited; No.3: The cylinder walls are thicker than two design schemes, cylinder and bottom need double welding. advantage: Simple structure, convenient operation, less welding parts. disadvantage: Pressure relief less, the cylinder body easy damage.
(6) —pressure inside the container wall Pa;n—explosive gas mole number,mol;R—Molar gas constant 8.3145J·mol-1·K-1 ;T—explosive temperature,K;V—volume of container,m3.
Screw parameter : select the 40MnB low alloy steel as the screw material , the design temperature is 20oC, equal to 196MPa, using formula (9) to calculate the screw diameter, 3 is safety coefficient , number of screw n equal to 8, then diameter 178mm could be get by formula calculation.
(9) —Main Screw Diameter,m;—Number of Main Screw ;—The Allowable Stress of Screw Material under Design Temperature,Mpa.
By the curve in figure 4, in the early stage, 3 kinds of explosive's compression performance level differences are not obvious, when pressure value increases to a certain degree, the order of 3 kinds of explosives from good performance to bad on preferential treatment is 3 #explosive, 1 # explosive, 2# explosives, but three of the curve of close by comparison, though increase sodium nitrite sensitization agent can improve the content of the antioxidant, static pressure performance, but is not obvious By the curve in figure 5 can be seen, the 2 # explosive's explosion performance relatively optimal, 1 # ,3 # explosives explosive performance curve almost coincidence, overall three explosive performance curve by comparison close-grained, that when sodium nitrite content to a certain value, and then continue to increase its content on the explosion of the explosives' little effect on performance.
Online since: December 2010
Authors: Tobias Björklind, Lennart Elmquist, Attila Diószegi
These changes are influenced by a number of parameters, and shrinkage porosity is formed not only because of one of these parameters but a combination thereof.
When solidification starts, grains are formed and feeding ability starts to decrease.
The cell size was measured as the diameter of a number of cells and the result is the average of at least 12 measurements in each region, depending on the number of cells visible in the field of view.
A small cell size means a high number of cells.
A large number of manganese sulfide particles was found on the dendrites, as shown in Fig. 8.
Online since: December 2023
Authors: Na Chen, Tao Zhang, Yu Zhang Jiao, Xin Chao Wang, Ke Fu Yao, Zheng Jun Zhang
Under such condition, the significantly increased resistivities of these FAOs indicate a drastic decrease in their charge carrier numbers.
Therefore, Ms of these FAOs decreases significantly with decreasing the charge carrier number.
Meanwhile, the decreased charge carrier number means a short charge screening length when subjected to an external electric field.
In this way, the ferromagnetism in terms of Ms varies with the tuned charge carrier number.
Masumoto, High saturation magnetization and soft magnetic-properties of bcc Fe-Zr-B alloys with ultrafine grain-structure, New bulk amorphous Fe-(Co,Ni)-M-B (M=Zr, Hf, Nb, Ta, Mo, W) alloys with good soft magnetic properties, J.
Online since: June 2021
Authors: Nan Ji, Jie Feng, Yan Long
There were numbers of etch pits on the inner wall and weld of the tee, and some were extremely obvious, and the depth of thus pit could be as deep as 2.1 mm (see Fig. 2).
The metallographic structure of the tee was ferrite and pearlite, and the grain size of the tee was 9.5, the nonmetallic type was thin A0.5, B1.0 and D0.5, there were no excessive defects in the tee material.
Analysis on Cause of Internal Corrosion The above test and analysis results show that the corrosion condition of the inner wall of was very severe, and there are numbers of etch pits on it.
There were numbers of cracks started form the bottom of some etch pits of the weld on the inner wall, and show a characteristic of SSC cracking.
The formation water composition analysis results show that there are a number of sulfate reducing bacteria in it, and the content is as much as 7000 individual/ml.
Online since: October 2014
Authors: Nina Koneva, Tatyana Kunitsyna, Ludmila A. Teplyakova
The role of the slipping plane numbers in the substructure evolution was revealed.
Investigation of the monocrystals makes possible to understand the nature of the dislocation structure formation in “clean” state that is without other factors, for example such as the presence of grain boundaries.
At this stage all octahedral slip planes work in a crystal but as a rule their number in local volumes is less than four.
Conclusion Summarizing the conducted experimental investigations of the dislocation structure is possible to make a number of conclusions.
In spite of the fact that in the monocrystals with the axial loading orientations [11] and [001] the number of equally loading planes is higher than in [011] monocrystals, the number of locally acting planes as a rule does not exceed two.
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