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Online since: January 2021
Authors: V.F. Kosarev, S.V. Klinkov, A.E. Chesnokov, A.V. Smirnov, T.M. Vidyuk
Butyagin, Power aspects of mechano-chemistry, Izv.
Report 3, Chemistry in Favor of Stable Development, 1996, Iss. 4, pp. 519-523.
Boldyrev, Mechanochemical Synthesis in Inorganic Chemistry, ed. by E.G.
Delaey, Structure and properties of Cu, Ni and Fe powders milled in a planetary ball mill, Scr.
Piller, Economic implications of 3D printing: Market structure models in light of additive manufacturing revisited, Int.
Report 3, Chemistry in Favor of Stable Development, 1996, Iss. 4, pp. 519-523.
Boldyrev, Mechanochemical Synthesis in Inorganic Chemistry, ed. by E.G.
Delaey, Structure and properties of Cu, Ni and Fe powders milled in a planetary ball mill, Scr.
Piller, Economic implications of 3D printing: Market structure models in light of additive manufacturing revisited, Int.
Online since: December 2011
Authors: Gao Feng Quan, Zhao Ming Liu, Ying Bo Zhang
The chemistry of metal powders is shown in Table 1.
The Mg-Al eutectic structure are shown in surface area, and the amount of the eutectic structure is decreasing with the depth.
At the position 1 there may be Mg12Al17 compound, and some eutectic structure of α-Mg+Mg7Zn3 shown at the vicinity of point 2 .
The alloyed surface layer is zigzagged microscopically, and eutectic structure showed up. 3.
The Mg-Al eutectic structure are shown in surface area, and the amount of the eutectic structure is decreasing with the depth.
At the position 1 there may be Mg12Al17 compound, and some eutectic structure of α-Mg+Mg7Zn3 shown at the vicinity of point 2 .
The alloyed surface layer is zigzagged microscopically, and eutectic structure showed up. 3.
Online since: May 2014
Authors: Zhong Yu Gao, Lan He Zhan, Hai Feng Zhang
Study of the influence of the electrocoagulation unit on activated sludge in membrane bioreactor
Haifeng Zhang1, a, Zhongyu Gao2, b, Lanhe Zhang2, c
1School of Chemistry Engineering, Northeast Dianli University, Jilin 132012, China
azhftju@163.com, bgofeigao@qq.com
Keywords: electrocoagulation, activated sludge
Abstract.
Zhang etc. studies have shown that a moderate amount of iron ions can improve the filterability of the sludge, it influences on supernatant and the nature of the sludge such as floc size, surface charge, floc structure and shape.
In general, The floc size greater and structure more compact, the corresponding fractal dimension value was greater, membrane fouling mitigation effect is more obvious.
The second stage is stabilization period, the fractal dimension of sludge floc changed little, indicating the presence of iron ions prevents floc size further increase, the size of the sludge flocs changed little in the 3-9 hours but a hollow structure can be observed in 9 hours in figure 4.
In the third stage, the fractal dimension continued to rise, the structure of composite flocs composed of the iron hydroxide flocs and sludge flocs was clear, tight and into strips. 0 h A C B 0 h 9 h 0 h 9 h 9 h 13h 13h 13h Fig.4 The change of floc images 2.
Zhang etc. studies have shown that a moderate amount of iron ions can improve the filterability of the sludge, it influences on supernatant and the nature of the sludge such as floc size, surface charge, floc structure and shape.
In general, The floc size greater and structure more compact, the corresponding fractal dimension value was greater, membrane fouling mitigation effect is more obvious.
The second stage is stabilization period, the fractal dimension of sludge floc changed little, indicating the presence of iron ions prevents floc size further increase, the size of the sludge flocs changed little in the 3-9 hours but a hollow structure can be observed in 9 hours in figure 4.
In the third stage, the fractal dimension continued to rise, the structure of composite flocs composed of the iron hydroxide flocs and sludge flocs was clear, tight and into strips. 0 h A C B 0 h 9 h 0 h 9 h 9 h 13h 13h 13h Fig.4 The change of floc images 2.
Online since: June 2011
Authors: Xian Zhi Qin, Shao Bin Xiang, Fu Heng Hao, Jing Tan, Qiu Guo Xiao, Shao Hua Shen
Research on the Al3+, V5+ Double Ionic Substitute Negative Thermal Expansion Compound Zr1-xAlxMoW1-yVyO8
Shaohua Shena, Xianzhi Qin, Shaobin Xiang, Fuheng Hao,
Jing Tan, and Qiuguo Xiaob
School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, China.
It undergoes an order-disorder phase transition at the temperature of 448 K[3], and thermal decomposition from 777 ℃ to 1105 ℃ or above 1257 ℃ and phase transition to a more dense structure at 0.21GPa[4].
Cubic ZrMo2O8 and ZrW2O8 are isomorphism compounds with the same crystal structure, the NTE coefficient of Cubic ZrMo2O8 is -5.0×10-6K-1 from 0 K to 660 K [5].
As a result, it indicates that the double substitute of Al and V has affected the crystal structure and the thermal expansion coefficient of ZrMoWO8.
Fig. 6 Thermal shock resistance of samples Summary In this paper, samples with the ZrW2O8 structure are synthesized by coprecipitation and sintering method.
It undergoes an order-disorder phase transition at the temperature of 448 K[3], and thermal decomposition from 777 ℃ to 1105 ℃ or above 1257 ℃ and phase transition to a more dense structure at 0.21GPa[4].
Cubic ZrMo2O8 and ZrW2O8 are isomorphism compounds with the same crystal structure, the NTE coefficient of Cubic ZrMo2O8 is -5.0×10-6K-1 from 0 K to 660 K [5].
As a result, it indicates that the double substitute of Al and V has affected the crystal structure and the thermal expansion coefficient of ZrMoWO8.
Fig. 6 Thermal shock resistance of samples Summary In this paper, samples with the ZrW2O8 structure are synthesized by coprecipitation and sintering method.
Online since: February 2015
Authors: Zi Yi Wang, Rong Zhao
The profiles of the pale structure morphology in the Sanzhao sag during each geological period show that the structures were gentle and tectonic activities were weak during the Nen-2 member, Nen-3 member and Nen-4 member periods.
During this period the line of Weixing-Songfangtun-Mofantun tends to uplift, the indication of the disordered migration direction become definite, this proved the structure paleotopography is important to the oil & gas accumulation in the Sanzhao sag (Fig. 3). 1-Sanzhao sag 2-Daqing placantieline 3-Mingshui terrace 4-Suiling anticline belt 5-Suihua sag 6-Chaoyanggou terrace Fig.3 Ancient tectonic morphology and fluid migration direction of northern Songliao Basin in geological history Conclusion Tectonic movements caused the strata crooked, cracked, subsidence and uplifted, and the inclined strata which caused by the tectonic movements become crucial to the production of buoyancy.
On the other hands, while the hydrocarbon migration distance is short and hydrocarbon accumulation amount is small in the area with the gentle inclined strata and simple structures, which would cause the trap unsaturated and the oil & water distribution complicated, such as the Sanzhao sag.
Physics and Thermodynamics of Capillary Action in Porous Media & Industrial and Engineering Chemistry, (1970)no.2,p.32-56
During this period the line of Weixing-Songfangtun-Mofantun tends to uplift, the indication of the disordered migration direction become definite, this proved the structure paleotopography is important to the oil & gas accumulation in the Sanzhao sag (Fig. 3). 1-Sanzhao sag 2-Daqing placantieline 3-Mingshui terrace 4-Suiling anticline belt 5-Suihua sag 6-Chaoyanggou terrace Fig.3 Ancient tectonic morphology and fluid migration direction of northern Songliao Basin in geological history Conclusion Tectonic movements caused the strata crooked, cracked, subsidence and uplifted, and the inclined strata which caused by the tectonic movements become crucial to the production of buoyancy.
On the other hands, while the hydrocarbon migration distance is short and hydrocarbon accumulation amount is small in the area with the gentle inclined strata and simple structures, which would cause the trap unsaturated and the oil & water distribution complicated, such as the Sanzhao sag.
Physics and Thermodynamics of Capillary Action in Porous Media & Industrial and Engineering Chemistry, (1970)no.2,p.32-56
Online since: May 2012
Authors: Peng Wang
The design and use of structures and components made from fibre composite materials has become an important aspect of engineering presently.
The mechanical properties are not strongly dependent on composition, but chemical behaviour which is reflected in terms of durability and strength retention in corrosive environments is influenced by chemistry.
If the structure is designed for stiffness rather than strength then carbon will be lighter than aramid.
This may be a disadvantage for structures for which a very long design life is required [8].
Eckold: Design and Manufacture of Composite Structures, edited by Woodhead Publishing, British (1994), in press
The mechanical properties are not strongly dependent on composition, but chemical behaviour which is reflected in terms of durability and strength retention in corrosive environments is influenced by chemistry.
If the structure is designed for stiffness rather than strength then carbon will be lighter than aramid.
This may be a disadvantage for structures for which a very long design life is required [8].
Eckold: Design and Manufacture of Composite Structures, edited by Woodhead Publishing, British (1994), in press
Online since: August 2019
Authors: Shivkumari Panda, Dibakar Behera, Tapan Kumar Bastia
Graphite/UPE Nanocomposite: Transport, Thermal, Mechanical
and Viscoelastic Properties
Shivkumari Panda1,a*, Dibakar Behera2,b and Tapan Kumar Bastia3,c
1Research scholar (chemistry), School of Applied Sciences, KIIT University, Bhubaneswar, Odisha, 751024, India
2Associate professor (chemistry), School of Applied Sciences, KIIT University, Bhubaneswar, Odisha, 751024, India
3Assistant Professor (chemistry), School of Applied Sciences, KIIT University, Bhubaneswar, Odisha, 751024, India
ashivkumaripanda@gmail.com, bdibakarkiit@gmail.com, cdrtkbastia@gmail.com
Keywords: UPE matrix, Graphite flakes, nanocomposite, transport properties, viscoelastic properties.
So by introduction of a small quantity of graphite endow the new class of multiphase nanocomposites with inimitable structure and tremendous application.
Scanning electron microscopy (SEM)- Fig.2 shows the morphological structure analysis of (a) UPE/ Graphite (1wt %) (b) UPE/ Graphite (2wt %) (c) UPE/ Graphite (3wt %) nanocomposites.
The presence of these nanofiller with optimum concentration of 2wt% results compactly packed structure without any cracks and voids and induces thermal resistance.
So by introduction of a small quantity of graphite endow the new class of multiphase nanocomposites with inimitable structure and tremendous application.
Scanning electron microscopy (SEM)- Fig.2 shows the morphological structure analysis of (a) UPE/ Graphite (1wt %) (b) UPE/ Graphite (2wt %) (c) UPE/ Graphite (3wt %) nanocomposites.
The presence of these nanofiller with optimum concentration of 2wt% results compactly packed structure without any cracks and voids and induces thermal resistance.
Online since: November 2012
Authors: Guo Ming Wang, Wen Jun Li, Zeng Zin Li
A comparative research on different preparation methods of furfural hydrogenation non-chromium catalysts
Zengxin Li1,a, Guoming Wang2,b and Wenjun Li3,c
1,2,3Department of Chemistry Teacher’s College of Qingdao University, Qingdao, China
alizx57@126.com, bgmwang_pub@163.com, cwenjun_li_happy@126.com
Keywords: furfural hydrogenation, non-chromium catalyst, furfuryl alcohol, amorphous alloy
Abstract: Furfuryl alcohol is an important organic chemical material.
Some environmental-friendly non-chrome catalysts, such as copper catalysts, CuO-CaO/SiO2 catalysts, Cu-Zn-Al catalysts, load Ni and ultra-fine Ni-B amorphous alloy catalysts, had been discussed and their preparations and structure characterizations were described.
CuO-CaO/SiO2 catalysts Wu Jing adopted other solution - gel to prepare ultrafine CuO-CaO/SiO2 catalysts and the catalyst structure were characterized by XRD, BET, TEM, XPS, and TPR [7]
Chemistry World, 1998, 39 (5) :268-271 [2]H.Adkins,R.Conner.
Some environmental-friendly non-chrome catalysts, such as copper catalysts, CuO-CaO/SiO2 catalysts, Cu-Zn-Al catalysts, load Ni and ultra-fine Ni-B amorphous alloy catalysts, had been discussed and their preparations and structure characterizations were described.
CuO-CaO/SiO2 catalysts Wu Jing adopted other solution - gel to prepare ultrafine CuO-CaO/SiO2 catalysts and the catalyst structure were characterized by XRD, BET, TEM, XPS, and TPR [7]
Chemistry World, 1998, 39 (5) :268-271 [2]H.Adkins,R.Conner.
Online since: September 2013
Authors: Teik Cheng Lim
Lakes: International Journal of Solids and Structures Vol.39 (2002), p.4825
Evans: Industrial & Engineering Chemistry Research Vol.39 (2000), p.654
Leng: International Journal of Solids and Structures Vol.50 (2013), p.996
Leng: Smart Materials and Structures Vol.22 (2013), art.045005
Evans: Industrial & Engineering Chemistry Research Vol.39 (2000), p.654
Leng: International Journal of Solids and Structures Vol.50 (2013), p.996
Leng: Smart Materials and Structures Vol.22 (2013), art.045005
Online since: November 2008
Authors: O. Šauša, Emília Illeková, Jozef Krištiak, Martina Iskrová, V. Majerník, D. Berek
Introduction
The dynamics of liquids and polymers confined in mesoscopically small (1-10nm) pores or
tubes has become a field of increasing interest in experimental physics and chemistry.
This assumption is supported by the observation of two different structures at higher temperatures (~280K) for ~10nm pores.
The existence of structure of the free volume was confirmed by calorimetric DSC measurements, see Fig.2.
No structure of free volume (τo-Ps) was observed for 3nm pore or bulk system in studied temperature region.
This assumption is supported by the observation of two different structures at higher temperatures (~280K) for ~10nm pores.
The existence of structure of the free volume was confirmed by calorimetric DSC measurements, see Fig.2.
No structure of free volume (τo-Ps) was observed for 3nm pore or bulk system in studied temperature region.