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Growth of AgGaS_2 single crystal by descending crucible with rotation method and observation of properties

Chinese Science Bulletin 2001年第23期46卷 2009-2013页

作者： ZHAO Beijun, ZHU Shifu, LI Zhenghui, YU Fengliang, ZHU Xinghua & GAO DeyouDepartment of Materials Science, Sichuan University, Chengdu 610064, China Department of Materials Science Sichuan University Chengdu China

This note reports a new procedure of polycrystalline synthesis and a new technique of single crystal growth on AgGaS2, i.e. two-zone temperature oscillation vapor transporting and descending crucible with rotation. A single phase dense AgGaS2 polycrystalline ingot was synthesized, and a crack-free AgGaS2 single crystal with 15 mm in diameter and 30 mm in length was grown by the techniques mentioned above. Structure integrity of the crystal was studied by the X-ray diffraction technique. Six order X-ray spectra from the {011} face of the crystal were obtained, and an anomalous phenomenon was observed for the first time that intensity of the higher order diffraction peak is much stronger than that of the lower order diffraction peak. Etch-pits of the crystal were observed by the scanning electron microscopy (SEM).

关键词： infrared nonlinear crystal AgGaS2 polycrystalline syn-thesis crystal growth X-ray diffraction etch-pits observation.

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Catalyst Free One-Pot synthesis of Chromeno Quinolines and Their Antibacterial Activity

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Green and Sustainable Chemistry 2017年第2期7卷 141-151页

作者： Sruthi Vasamsetty Sunitha Medidi Satheesh Ampolu Ravi Kumar Majji Mastan Rao Kotupalli Chikurumilli China Satyanarayana Annapurna Nowduri Paul Douglas Sanasi Department of Engineering Chemistry AU College of Engineering (A) Andhra University Visakhapatnam India SKR College for Women Rajamahendravaram India Department of Chemistry Dodoma University Dodoma Tanzania SKBR College Amalapuram India

An efficient greener one pot synthesis of dimethyl-dihydro-7H-chromeno[3, 2-h]quinolin-8(9H)-one derivatives has been synthesized through cyclization of aromatic aldehyde, dimidone and 8-hydroxy-quinoline through one-pot condensation method is described. The synthesized compounds are screened for further biological activities against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus subtilis, Bacillus using cut plate method and disc diffusion method.

关键词： Dimethyl-Dihydro-7H-Chromeno[3 2-h]Quinolin-8(9H)-One Derivatives syn-thesis Biological Activity and One-Pot Condensation

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Effect of Al Source and Starting Materials Additions on synthesis of Al_8B_4C_7

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China's Refractories 2013年第3期22卷 18-22页

作者： CUI Peng DENG Chengji ZHU Hongxi YUAN Wenjie The Key State Laboratory Breeding Base of Refractories and Ceramics Wuhan University of Science and Technology

Hexagon plate-like Al8B4C7 powders were success- fully synthesized using a mixture of diboron trioxide, ac- tivated carbon and aluminum or alumina by a carbotherreal reduction process. The effect of A1 source and start- ing materials additions on synthesis of Al8B4C7 was in- vestigated. The phase composition and microstructure of Al8B4C7 powder were characterized by means of XRD, SEM and EDS. The main phase compositions of the products synthesized Jkom A1, B2O3 and activated carbon are Al8B4C7 and A120C. Al2O3 can replace Al to synthe- size Al8B4C7. AlsB4C7 grains synthesized from Al2O3, B2O3 and activated carbon are hexagon plate-like and have a thickness of 10 tzm and a size of about 100 tzm.

关键词： AlsB4CT diboron trioxide alumina syn-thesis carbothermal reduction

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