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Introduction Porous silica, a kind of amorphous inorganic solid materials, has large specific surface area, abundant pores, excellent adsorption ability, and chemical stability, and is widely used as pollutant adsorbent, gas separation materials, catalyst carrier, HPLC packing, et al.
Acknowledgment This work was supported by the National Natural Science Foundation of China (20636030, 20706011) and the Natural Science Foundation of Hebei province (B2010000023).
Lin, “The Effect of Catalysts on TEOS Hydrolysis-Condensation Mechanism,” Journal of Inorganic Materials, Vol. 12 (3), Jun. 1997, pp. 363-369
Sun, “The Mechanism of Hydrolysis and Condensation of Organic Silicon Oxygen Alky,” Chinese Journal of Colloid & Polymer.
Yuan, “The Dynamic Laser Scattering(DLS) Investigation on the Hydrolytic Polycondensation of Tetraethylorthosilicate(TEOS)”, Materials Review.Vol. 20 (6), Jun. 2006, pp. 144-146

Aluminium Alloy Matrices Reinforced with Coated Particulate Silicon Carbide Pengyuan Yang1,a, Yuhong Chen2,b and Bin Chen3,c 1,2,3Key lab of advanced ceramics and powder materials, Materials science and engineering school,BeiFang university of nationalities,Yinchuan, NingXia,China 750021 apengyuan.polymer@gmail.com, b lyhchen@163.com, c1151347108@qq.com Keywords: pressureless sintering; particles; copper-coating; fracture characteristics Abstract: The low-cost production and performance of 6061-aluminium alloy matrices reinforced with coated silicon carbide particulate has been studied.
Introduction The physical and mechanical properties that can be obtained with metal matrix composites (MMCs) have made attractive candidate materials for aerospace, automotive and numerous other applications.
In the process of mixing materials, the dispersion of oxidated SiC and Al is best.
Journal of the Electrochemical Society, 1985. 132(6): p. 1277-1281
Composites Science and Technology, 2000. 60(6): p. 865-869

When the force of impact disappears, the impact point restores to liquid state, and the materials become soft again.
These standards set rules for test equipment, testing tool, backing materials, etc.
Composites Science and Technology.
Textile Research Journal.
Vol. 218 Part L: Journal of Materials Design and Applications [14] I.

Numerical Simulation of the Formation Process of the Keyhole in Laser deep Penetration Welding Renping Wang, Yongping Lei and Yaowu Shi School of Material Science and Engineering, Beijing University of Technology, Beijing, China wrp520@gmail.com Keywords: Laser welding, Keyhole, Recoil pressure, Numerical simulation Abstract.
Katayama: Dynamics of Keyhole and Molten Pool in Laser Welding, Journal of Laser Applications, Vol.10 No.6, pp 247-254, 1998 [2] P.
Negro: A study of the effect of multiple reflections on the shape of the keyhole in the laser processing of materials, Jouranl of Physics D: Applied Physics, Vol.30, pp 3216-22, 1997 [3] U.
Mordike: CO2 laser beam welding of magnesium-based alloys, Welding Journal, Vol.77, pp 149s-154s, 1998 [5] C.
Nichols: Volume of fluid method for the dynamics of free boundaries, Journal of Computational Physics, Vol.39, pp201-225, 1981

Based on this, we chose pakchoi as the materials in this experiment and study the effect on the output ,quality and the content of Cd by adding the straw ash, sewage and the mixture to the cadmium contaminated soil .
Materials and methods Selected materials.
Turnip Production and Quality and Mineral Assimilation Influenced by Complex Pollution of Cadmium and Lead in a Grey Chao Soil of Wuhan [J] journal of agro-environment science, 24(2)(2005) 231-235
LI Jia-jia，FU Qing-ling，LU Yi，HU Hong-qing .Absorption of Heavy Metals Cadmium, Lead and Their Complex Pollution by Pepper Grown on Grey Chao Soil[J] journal of agro-environment science, 24(2)(2005) 236-241
A Effects of Heavy Metal Cadmium on Nutrition Quality Indicators of Non-Headi ng Chinese Cabbage in a Polluted Cinnamon Soil[J] journal of agro-environment science, 23(4)(2004) 678-682 [14].

Materials and methods Study area The study was conducted in Shilou town of Fangshan district.
Journal of Agro-Environment Science, 2005, 24（2）：266-269(in Chinese ) [4] J Yang, T B Chen, Y M Zheng, J F Luo, H L Liu, W Y Wu, Y C Chen.
Journal of agro-environment science, 2011, 30 (2): 263-270 (in Chinese ) [8] T B Chen, Y Zheng, H Chen, G D Zheng.
Journal of agro-environment science, 2009, 28(1): 66-71 (in Chinese ) [10] H Fu, Y H Wu, L H Wei.
Journal of agro-environment science, 2006, 25(1): 182-185(in Chinese ) [11] K L Hu, F R Zhang, Y Z Lv, R Wang, Y Xu.

Ningbo Branch of Academy of Ordnance Science, Ningbo 315103, China; 2.
The study results can provide reference for the research and development of new photocatalytic materials.
Materials Review, 2009, 23(z1): 79-83
Journal of Crystal Growth, 2004, 261:566-570
Journal of Material Science &Engineering, 2011, 29（2）:267-232.

Raman spectra were a useful tool to observe the stress of semiconductor materials without damaging the sample.
There existed big mismatch of lattice between AlGaN and GaN materials.
Raman spectra were a useful tool to observe the stress of semiconductor materials without damaging the sample.
Elastic deformation in strained nitride semiconductor materials can change states of binding atom and the frequencies of the phonon modes.
While the excited laser was switched to 325nm, Raman peaks related GaN and AlGaN materials were observed.

Materials and Experimental details Materials.
Chemical composition of commercial MK (Maoming Kaolin Science and Technology Co.
McWhinnie, The solid state chemistry of metakaolin-blended ordinary Portland cement, Journal of Materials Science, 35 (2000) 2701-2710
Wang, Dominant Factors on the Early Hydration of Metakaolin-Cement Paste, Journal of Wuhan University of Technology-Materials Science Edition, 25 (2010) 849-852
Shen, Influence of metakaolin on pore structure-related properties and thermodynamic stability of hydrate phases of concrete in seawater environment, Construction and Building Materials, 36 (2012) 947-953.

Experimental 2.1 Materials.
The materials of beet pulp were purchased from the sugar plant of Baotou.
Journal of Cellulose Science and Technology, 2010, 18(2): 15-21
Polymer Materials Science & Engineering, 2003, 19(3):194-197
Journal of Applied Polymer Science, 2008, 109(1): 23-31.