Search results

Structure and Performance of CalcinedBauxite Binzheng Fang1, a,*,Hui Li1,b, Jianwei Cao1,c, Jianfeng Wu2,d, Xiaohong Xu2,e, and Xidong Wang1,f,* 1Institute of Engineering (Baotou), College of Engineering Peking University, Baotou 014030, China 2State Key Laboratory of Silicate Materials for Architectures, Wuhan 430070, China afangbz@ie.pku.edu.cn, blih@ie.pku.edu.cn, ccaojw@ie.pku.edu.cn Keywords:Calcined bauxite, Physical and chemical properties, Thermal performance, Phase composition and microstructure Abstract.
Experimental Raw materials.Calcinedbauxite was provided by Henan Xinmi.
Table 1 The chemical composition of calcined bauxite（wt%） Materials SiO2 Al2O3 Fe2O3 TiO2 CaO MgO K2O Na2O I.L Total calcined bauxite 12.09 78.05 1.03 4.17 0.24 0.30 0.46 0.11 3.05 99.74 Experimental procedures.The calcined bauxite was ball milled in a zirconia pot with zirconia ball for 1 hand passed through 250 mesh sieve to get the desired powder.
Bulletin of Materials Science, 2008, 31(7): 995-999
Journal of the European Ceramic Society, 2009, 29(10):1887-1894

Introduction New technologies call upon increasingly powerful materials obtained thanks to the development, unceasingly growing, of composite materials.
However, the materials are assumed to be homogeneous.
Materials Science and Engineering: R: Reports, 2000, 28 (1-2): p. 1-63
Progress in Polymer Science, 2003, 28 (11): p. 1539-1641
Materials Chemistry and Physics, 2006, 96 (2-3): p. 244-252

However, in addition to environmental problems [6,7], conventional OBMs now used cannot perform well without colloidal materials such as organophilic clays and asphalts (filter reducer).
These colloidal materials are fine particles which adversely affects rate of penetration by causing excessive viscosity of drilling fluids [8].
In addition, other inorganic particles also have highly electronegative groups on their surface, such as barite, calcium carbonate powder or other materials.
Gel strengths are the shear stresses at low shear rates after the muds were set static for 10’ and 10’’, which implies the ability to suspend drill cuttings and weighting materials.
Barite, weighting materials for OBM, are small particles that can plug crack formation to some extent.

Wang2,b 1Electronic and information engineering，Nanjing Communications Institute of Technology，Nanjing 211188, China 2College of Science, HoHai University, Nanjing 210098, China akaijuzhang@126.com,b1072615510@qq.com Keywords: mismatch strain; MgxZn1-xO alloys; metastable; miscibility gap Abstract In this paper, a theoretical calculation of the miscibility gap taking modified interaction parameter and mismatch strain into account are performed for the MgxZn1-xO ternary compound system using the modified strictly regular solution model.
Introduction Zinc oxide(ZnO) and related semiconductor crystals are new and very attractive materials for their application in ultraviolet light-emitting device, deep ultraviolet sensors, transparent thin-film transitors, multifunctional integrated circuits, and so on.
So it is very important to clarify the unstable and stable-mixing regions of this material system.
El Haj Hassan, Computational Materials Science 40 (2007) 66–72 [9] Karpov S.
SPALDIN1, Journal of ELECTRONIC MATERIALS, Vol. 35, No. 4, 2006 [11] A.

Lee 2,d 1, Depart. of Electronic Materials Sunmoon University, 100 Kalsan-Ri Tangjeoung-Myun Asan Chungnam, 336-840 Korea 2 KAERI, Dukjin-Dong 150, Yusung-Gu, Daejeon, 305-353 Korea ayochoih@hanmail.net, byochoi@sunmoon.ac.kr,cbgkim1@kaeri.re.kr, dywlee@kaeri.re.kr Keywords: Coated Fuel, Silicon Carbide, Graphite, Nano-indentation.
Although various techniques were developed to analyze the coated layers such as chemical methods, one of the problems in production scale, it is necessary to find a conventional method to evaluate thin coated layers such as various mechanical properties and density.[2] Recently, kinetic indentation technique is proposed to evaluate mechanical properties of nanostructure materials.[3] The method is theoretically based on both the proportion of elastic and plastic deformation and the values obtained by micro-hardness test.
Hence, the objectives of this study are to apply the nano-indentation technique to evaluate mechanical properties of irradiated materials and establish the method for the development of nuclear materials.
Acknowledgements This study was supported by Korea Science and Engineering Foundation (KOSEF) and Ministry of Science and Technology (MOST), Korean government, though National Research Laboratory (NRL) Program.
Alekhin, Journal of Tambov State University, Vol. 3(3) (1998) p. 1

Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine, Prospekt Nauky 41, Kyiv 03028, Ukraine aczelenska@gmail.com, btsasaki@rie.shizuoka.ac.jp, cgnatyuk@ua.fm * corresponding author Keywords: terahertz spectroscopy, salicylic acid, fingerprint spectrum, Fourier transform infrared spectroscopy, solid-state density functional theory.
Introduction THz research is a powerful and promising branch for the application in characterization of materials [1] (for example, organic matter [2] and ion solutions [3], semiconductors [4, 5] and pharmaceutical drugs [6]), medical imaging [7], non-destructive testing and security.
Characteristic absorption lines in THz spectra of materials are considered as fingerprint spectra for exact matter and applied to distinguish compounds of various objects.
Populating the database with spectra of different substances is useful for identifying materials for various monitoring application.
Korter, Understanding the terahertz spectra of crystalline pharmaceuticals: terahertz spectroscopy and solid-state density functional theory study of (S)-(+)-Ibuprofen and (RS)-Ibuprofen, Journal of Pharmaceutical Sciences 100 (2011) 1116–1129

Research on Impact Fracture and Microstructure of 40Cr Steel under Different Tempering Conditions Yiqiang Xiao1, Shengxu Liu1, Minglong Kang1, Jianmin Zeng1, a Guoan Wang2, Qiuhong Meng2, Yingzhang Deng2 1Key Laboratory of New Processing Technology for Nonferrous Metal materials, Ministry of Education, Guangxi University, Nanning 530004, P.R.China 2Guangxi LiuGong Machinery Co., Ltd, Liuzhou, 545007, China azjmg@gxu.edu.cn Keywords: 40Cr, impact fracture, microstructure, tempering cooling medium Abstract.
Experimental methods Material.
Hot rolled 40Cr steel was used for test material.
Acknowledgements The authors sincerely thank the financial supports from Guangxi Science and technology project (1348010-1) and Natural Science Foundation of Guangxi (2011GXNSFF018001).
References [1] Zhengming Zeng: Iron and Steel Materials Manual (Beijing 2009) [2] Gao Weiguo, Dong Lijun, Hu Fenglan, Qin Bo: Journal of Hunan institute of engineering Vol. 18 (2008), p. 33 [3] Wang Ruiquan, Han Qiuhua, Liu Yanyan: Heat treatment technology and equipment, Vol. 31(2010), p. 29 [4] Zhang Hongying, Zhang Hongbing, Hu Jingxia: Hot working technology, Vol. 35(2006), p. 23 [5] Xiao Yiqiang, Liu Shengxu and Kang minlong: Advanced Materials Research Vol. 881-883 (2014), p. 1271

The research of Janus colloidal particles has attracted much attention in recent years because of its huge prospects and applications in materials, chemicals, medicine, catalysis, etc.
In addition, Janus particles have great prospects in many areas such as high-efficiency catalytic systems, fluorescent labels, and functional materials.
Therefore, it is significant and necessary for materials researchers to study it.
Corrosion of Ceramic Materials.
Computational Materials Science.

The work material was solution treated to a hardness of 32HRc.
I.A Choudhury, M.A El-Baradie (1998) Machinability of Nickel-based Super alloys: a general review, International Journal of Materials processing, 278-284, 1998. 2.
Study on the machinability characteristics of super alloy Inconel 718 during high speed turning, D.G.Thakur, B.Ramamoorthy, L.Vijayaraghavan, Materials and design.30, (2009), 1718-1725. 6.
M.Nalbant, H.Gokkaya, G.Sur, Application of Taguchi method in the optimization of cutting parameters for surface roughness in turning, Materials & Design,(2007),1379-1385. 8.
K.Palanikumar, K.Shanmugam,J.Paulo Davim, Analysis and optimization of cutting parameters for surface roughness in machining AL/SiC particulate composites by PCD tool, international journal materials and product technology, Inder science enterprises Ltd, Vol 37, 117-128,2010.

These events produced material bases for the formation of Chaohu Stone.
Xia: Journal of Anhui Normal University (Natural Science) Vol. 29 (2006), p. 290 [2] C.
Liu: Journal of Anhui Normal University (Natural Science) Vol. 31 (2008), p. 483 [11] X.
Tang: Environmental Archaeology (Science Press, Beijing 2007)
Hu: Journal of Stratigraphy Vol. 25 (2001), p. 69 [18] X.