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Online since: May 2011
Authors: Jian Kang Song, Ai Min Tang
Introduction Cellulose, a homogeneous polymer of b- (1, 4) glucose, one of the most plentiful renewable resources on Earth, is widely used in the field of paper-making, textile, functional materials and chemicals.
These extreme conditions can drive chemical reactions such as oxidation, reduction, dissolution, and decomposition, which have been exploited to prepare a variety of nano materials [8-12], such as nanocrystalline ZnO [8] , nano-sized lithium cobalt oxide [9], cobalt nano-particles [10], MoS2 nanorods [11] and many other nanoparticles [12].
Experimental Materials.
Acknowledgements This work was financially supported by National Nature Science Foundation of China (No.50573022) and the “973” Key Foundation of China (No.2010BC732206).
Morikawa: Japan Tappi Journal.
Online since: February 2013
Authors: Zong Fang Liu, Hong Xia Xie, Lian Zhi Guo, Yong Zhang
There are many scholars studying the ultrasonic nondestructive testing of spot-welded joint[1,2,3], but the ultrasonic non-destructive testing technology for testing spot welding quality has not achieved the satisfactory effect so far, especially in the test and identification for hazardous defect (for example, false welding), because the ultrasonic wave in the different materials has different propagation characteristics as well as its complexity of ultrasonic technique. 00Cr18Ni10N is a new type of ultra-low carbon and high strength austenitic stainless steel, which is characterized with high strength, good toughness, corrosion resistant and extensive applicability in the field of engineering.
Because the differences of density and speed of sound between the welded nugget and base material is less than one in a thousand, if the appreciable reflection is not generally produced from the interface of the welded nugget and base material, it indicates that this area locates inside the welded nugget and the developed columnar crystals in the nugget has a great influence on the ultrasonic attenuation; the amplitude of transmitted ultrasonic wave shown in Fig. 2e) becomes lower while the secondary transmitted wave hardly exists, from which it can be inferred that there could lie in the center of nugget and columnar crystals could be bulky.
The microstructure and appearance of false welding joint are similar to those of the base material, and density and speed of sound of false welding joint is almost same with those of the base material, so there isn’t a strong ultrasonic attenuation effect during the transmission. 1mm Fig.5 The Macrophotograph of the Specimen 2 3.3 Comparative Analyses of Test Results about Specimen 1 and 2.
Acknowledgements The authors would like to thank for the financial support from the National Natural Science Foundation of China through document 51275418.
Sonat , Ultrasonic examination of resistance spot welds, The e-Journal of Nondestructive Testing Ultrasonic. 8(2003)26-30
Online since: December 2014
Authors: Yi Cui, Zi Liu Xiong, Hong Qiang Liu, Xue Hui Wang, Jie Xue, Jian Ying Li
So it has some practicality value to study this material.
Coating material is Al-10%Si。
Lou, Journal of Chinese Society for Corrosion and Protection, 5 (1997) 464~469
Xiang, Transactions of Materials and Heat Treatment, 28 (2007) 130-133
Wu, science of the surface engineering.
Online since: January 2014
Authors: Yue Sun, Bing Han, Dong Bei Yue, Ting Yang
Methods and Materials Methane oxidation was determined with the stable isotope (13C) technique as a function of methane emission rate.
(eds.): Climate Change 2007: The Physical Science Basis.
Stern, Characterization of methane flux and oxidation at a solid waste landfill, Journal of Environmental Engineering. 132 (2006) 220-228
Hater, Improved field methods to quantify methane oxidation in landfill cover materials using stable carbon isotopes, Environ Sci Technol. 42 (2007) 665-670
Green, Effect of temperature and oxidation rate on carbon-isotope fractionation during methane oxidation by landfill cover materials, Environ Sci Technol. 42 (2008) 7818-7823
Online since: June 2017
Authors: Zi Ming Wang, He Qing Shen, Xiao Fan Pang, Long Xue
Putting Cement to Sleep with Sucrose and Waking it up with Ca(OH)2 Xiaofan Panga, Ziming Wangb, Heqing Shenc and Long Xued Department of Materials Science and Engineering, Beijing University of Technology, No.100 Pingleyuan, Chaoyang District, Beijing 100124, China.
Materials and Methods Materials.
Journal of the Chinese Ceramic Society, 1998, 26(2):164-170
Online since: March 2020
Authors: Xian Zhi Ye
This process and its complicated difficulties require a lot of manpower and material resources.
Researchers from the Institute of Organic and Biochemical Sciences of the Czech Academy of Sciences have developed a new methodology for facile preparation of affinity probes for the identification of unknown targets of biologically active small molecules3.
To verify the utility of the method, the Researchers from the Institute of Organic and Biochemical Sciences of the Czech Academy of Sciences used fibroblast activation protein (FAP) inhibitors, type II glutamate carboxypeptidase II (GCPII) inhibitors and aspartame.
Proceedings of the National Academy of Sciences 2009, 106 (51), 21984-21989
Journal of the American Chemical Society 2007, 129 (4), 873-880
Online since: January 2013
Authors: Shi Xiong Hao, Zhu Xiao Yu, Qing Shan Fu
Electrochemical behaviors of different gradesof pure aluminum in alkaline solution Zhuxiao YU 1,2,a, Shixiong HAO 1,2,b*, Qingshan FU 1,2,c* 1College of Material and Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000 China; 2 the Material Corrosion and Protection Key Laboratory of Sichuan Province,Zigong 643000 China ayuzhuxiao@126.com, bshxionghao@126.com, csendysan@126.com * Corresponding authors.
Aluminum and its alloys have long been attractive as an anode material of batteries, due to its high capacity (2.98Ah/g) and negative potential (-2.35V vs.SHE).
Acknowledgments This work was supported by the Material Corrosion and Protection Key Laboratory of Sichuan Province (Project 2010CL03) and the Financial Support of the Department of Education of the Sichuan Province, China (09ZC056).
Materials Chemistry and Physics, 2002, 77: 305 –309 [6] A.
WANG, et al, Electrochemical properties of anodes based on Al alloys in alkaline medium, Chinese journal of power sources, 26 (2002) 365-368 [9] J.
Online since: April 2021
Authors: Alla A. Gerasimova, Oleg Kobelev, Lilya M. Valeeva
Methods and Materials Modern reactor plants have a higher level of safety and technical and economic characteristics.
Vessel material - 15H2NMFA reactor steel.
Sim, Analysis of special foring processies for heavy ingost, International journal of Machine tools manufacturing. 2 (1988) 173-179
Chichenev, Designing lines for the production of composite materials based on the object-oriented approach, Heavy Engineering. 6 (1999) 16-20
Slobodyanik, Numerical modeling of the material layer upset forging with extrusion under the stiffening rib into the forging cavity, Springer International Publishing. 2 (2019), 1071-1077
Online since: June 2004
Authors: Robert S. Okojie
Introduction Internal stresses in semiconductor substrate materials have over several years been recognized to be deleterious to the yield and reliability of electronic devices and have remained a major research topic in silicon and the III-V semiconductors [1].
It further shows that off-axis wafers consistently exhibited larger initial radii of Journal Title and Volume Number (to be inserted by the publisher) 3 Sample Polytype/ Orientation ρ (Ω-cm) Ro (m) Rcool (m) 1/R (m-1) σ500C (MPa) 1 4H/n-type/8 o 0.022 20.72 26.92 -0.011 1.14 2 4H/n-type/8 o 0.01 13.17 15.56 -0.012 1.28 3 4H/n-type/8 o 0.022 22.66 36.37 -0.017 1.86 4 4H/n-type/0.2 o 0.007 6.87 6.41 0.01 -0.71 5 4H/n-type/.05 o 0.022 5.32 6.16 -0.027 1.80 6 4H/n-type/.17 o 0.065 5.83 7.13 -0.031 2.14 7 6H/p-type/3.5 o 1.7 19.11 22.82 -0.01 0.91 8 6H/p-type/3.5 o 2.3 14.6 18.01 -0.01 1.32 9 6H/p-type/3.3 o 2.7 16.12 23.73 -0.012 2.11 Table 1: Summary of changes in radius of curvature of the on- and off-axis 4H- and 6H-SiC substrates after thermal excursions to 500 oC and cooling.
Electronic Materials, 30(3), p. 188 (2001)
Ohring, The Materials Science of Thin Films, Academic Press, Inc., New York (1992)
Online since: October 2007
Authors: Jatindra K. Rath, Ruud E.I. Schropp, Hongbo Li, Ronald Franken, Robert L. Stolk
Schropp Surfaces, Interfaces, and Devices, Faculty of Sciences, Utrecht University P.O.
The structure of this material consists of nano-sized silicon crystallites, typically with sizes of tens of nanometer, embedded in amorphous silicon (a-Si:H) tissue.
More seriously, as can be seen from Fig.3b, there are stripe-like voids formed in the silicon layers originating from this area, through which conductive materials such as ITO from the sputtered front contact may defuse through them and make direct connection to the Ag/ZnO layer, and therefore, create a short circuit path for the n-i-p junction.
In the cases where these voids are not fully filled with ITO, or the conductive element is not ITO but another material with a lower conductivity, the minimum density for m to cause short-circuiting will increase.
Schropp, Journal of Non-Crystalline Solids, Vol. 352 (2006) p.1941.
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