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Introduction Nanometer technology changes with each passing day，nanometer material science is also unceasing and progressive.
Nanometer SiO2，as one of nanometer materials，its preparation method emerges continuously，such as Sol–gel technique, the vapor deposition, precursor, intercalation polymerization, and supermolecular self-assembly techniques[1-2].
Now, the high purity spherical nano-silica which is used in our country was almost importation, and its application scope is also extended continuously，such as materials of electronic encapsulation, photonic crystals, catalyst supports, accurate ceramic material, rubber, coating material etc[3].
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However, because of their hardness and chemical inertness, polishing of these materials is difficult.
The transformed materials are then removed mechanically by the rubbing between the disk and PCDC.
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Acknowledgement It is a project supported by National Natural Science Foundation of China(70872026, 70972096, 71002060), Postdoctor Science Foundation of China (20090450968), The Fundamental Research Funds for the Central Universities(HIT.HSS.201114), Research Fund for the Doctoral Program of Higher Education of China (20102302110058).
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Under the same stress level, elastic strain A showed little difference among the three materials.
Because of the improvement from the ultimate loading, the materials could afford more stress or get less deformation.
Untreated poplar fibers were connected by some amorphous shell materials like the semi cellulose and lignin et. al.
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Mudaliar 2 1.School of NAVAL Architecture and Ocean Engineering, 1.Huazhong University of Science and Technology, Wuhan, 430074, P.R.
Figure 1 show original regenerator and enlarge fiber materials.
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Materials and Method Materials.
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Chalid, “Micro-Fibrillated Cellulose Fabrication from Empty Fruit Bunches of Oil Palm,” Materials Science Forum, vol. 1000, pp. 272–277, 2020, doi: 10.4028/www.scientific.net/MSF.1000.272
Chalid, “Feasibility study of pressure boiled method on defibrillation stalk sweet sorghum fibres waste,” in Materials Science Forum, Trans Tech Publications Ltd, 2019, pp. 71–75. doi: 10.4028/www.scientific.net/MSF.951.71

Svensson Department of Physics/Centre for Materials Science and Nanotechnology, University of Oslo, P-O Box. 1048, N-0316, Oslo, Norway anaveengoud.ganagona@fys.uio.no (corresponding author) Keywords: Trivacancy, trivacancy-oxygen, Silicon, DLTS Abstract.
Introduction Vacancy related defects influence the electrical and optical properties of Si materials and can serve as effective recombination centres to reduce the minority charge carrier lifetime.
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Acknowledgements This research project is supported by Hebei Science Foundation in P.R China (No.
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This constrains the usage of discussed material.
The influence of X-ray and femtosecond radiation on the structure of phosphate glassy materials is well known (for example, [13-15]).
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