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Effect of Calcium Leaching on the Properties of Cement-based Composites

Journal of Wuhan University of Technology(Materials Science) 2011年第5期26卷 990-997页

作者：林威廷鄭安 Institute of Nuclear Energy Research Atomic Energy Council Dept.of Civil Engineering National Ilan University

Leaching is one of the major factors that alter the mechanical properties of cement-based *** study is aimed to investigate the effect of leaching on the properties of cement-based *** with two water/cementitious ratios and two mineral admixtures were *** electrical potential was applied to accelerate the leaching *** strength test,scanning electronic microscopy,thermogravimetric analysis and X-ray diffraction analysis were *** results demonstrated that the calcium leaching reduced compressive strengths of concrete specimens,and such effect was prominent on the specimens without mineral *** leaching resistance increased with a decrease in water/cementitious ratio and an increase in amount of mineral *** mineral admixtures would reduce the amount of calcium hydroxide and refine the pore structure through pozzolanic reactions.A fair relationship was found between the calcium leaching and the compressive strength.

关键词： leaching slag silica fume X-ray diffraction analysis thermo gravimetric analysis

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Synthesis, Growth and Characterization of Nonlinear Optical Single Crystal of Serine Succinate

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Journal of Minerals and Materials Characterization and Engineering 2021年第1期9卷 75-89页

作者： S. Akilandeswari L. Jothi Department of Physics Namakkal Kavignar Ramalingam Government Arts College for Women Namakkal India Periyar University Salem Tamilnadu India

Nonlinear optical single crystal of Serine Succinate (SSA) was grown from a mixed solvent of water, ethanol and methanol. Since amino acid exhibits nonlinear optical property, it is of interest to dope them in serine. The overwhelming success of molecular engineering in controlling nonlinear optical properties in last decade has prompted better initiative in crystal engineering. In the present study single crystals of serine doped with succinic acid in different ratios have been grown by slow evaporation solution growth method. Grown serine succinate crystals were subjected to various characterization techniques. The cell parameters of the grown crystals were characterized by X-ray diffraction analysis. FT-Raman spectral studies were carried out on the SAA grown material to confirm the synthesized compound and the functional groups of serine succinate single crystal were identified from FTIR analysis. The optical transparency and upper cut off value of UV transmission spectrum of SSA crystal were recorded. Fluorescence study was also carried out for the grown materials. The mechanical hardness was estimated by Vickers’s micro hardness tester. The second harmonic generation (SHG) of the grown crystal was confirmed by Kurtz powder technique. Thermal properties of serine succinate crystal were evaluated with thermogravimetric, differential thermal and differential scanning calorimetric analyses. The SEM studies were also reported.

关键词： Crystal Growth Slow Evaporation Technique thermo gravimetric analysis

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Liquid crystalline Graphene Oxide based Advanced Materials

Liquid crystalline Graphene Oxide based Advanced Materials

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2013年全国高分子学术论文报告会

作者： Kunal Das Dagang Liu Department of Chemistry School of Environmental Science and EngineeringNanjing University of Information Science and Technology

＜正＞There is an extensive thrust to develop liquid crystal of graphene oxide and it’s advanced materials in the fields of physics,chemistry and materials *** is a single atomic plane of graphite,constructed with sp... 详细信息

关键词： Graphene oxide Liquid crystal thermo gravimetric analysis

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