[Tan, Ying; Hou, Qing-Lin] Key Laboratory of New Packaging Materials and Technology, Hunan University of Technology, China;[Wang, Ji-Qing; Hou, Qing-Lin; Wu, Ming-Ming] Key Laboratory of Green Packing and Biological Nanotechnology, Hunan University of Technology, Zhuzhou 412007, China
[ Hou, Qing-Lin ; Duan, Hai-Ting ] College of Packaging and Material Engineering, Hunan University of Technology, Zhuzhou 412007, China;[ Hou, Qing-Lin ; Liu, Yue-Jin ; Duan, Hai-Ting ] College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China
Macromolecular Chemistry and Physics,2013年214(16):1829-1835 ISSN：1022-1352
[Chen, Xianhong ; Tu, Xi ; Wu, Xiaoli ; Zhou, Mi ] College of Materials Science and Engineering, Hunan University, Changsha, 410082, China;[Chen, Xianhong ; Hou, Qinglin ] College of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou, 412007, China
[Chen, XH] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.
Nie, Libo;Yang, Yun;Li, Song;Wang, Jiqing;Hou, Qinglin
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY,2007年7(8):2927-2929 ISSN：1533-4880
[Nie, Libo] Zhongshan Polytechnic, Zhongshan 528436, China;[Nie, Libo; Li, Song; Wang, Jiqing; Yang, Yun; Hou, Qinglin] Hunan Key Laboratory of Green-Packaging and Application of Biological Nanotechnology, Hunan University of Technology, Zhuzhou 412008, China
[Nie, LB] Hunan Univ Technol, Hunan Key Lab Green Packaging & Applicat Biol Nan, Zhuzhou 412008, Peoples R China.
(e ,3e) process - (I ,J) conditions - Colloidal gold - DNA hybridizations - DNA immobilization - frequency shifting - nano gold - Oligo nucleotides - Quartz crystal microbalance (QCMB) - Real time
This article studies on flotation of quartz using magnesium ion as activator in the system of dodecyl sulphate, studies of magnesium ion on ZETA potential of the quartz surface and the flotation recoveries of the quartz through flotation experiment, ZETA potential measurement and infrared spectroscopy and solution chemistry of magnesium calculation. The results show that ZETA potential of the quartz surface showed negative charge when the pH>2, is not conducive to the adsorption of the anionic collector dodecyl sulphate. When adding magnesium ion, ZETA potential began to rise sharply, and the recovery rate of the quartz began to increase sharply at pH = 8. ZETA potential of quartz surface show positive charge, and the recovery rate of the quartz is corresponding to the maximum within pH=10-12. Combined with the solution hydrolysis of magnesium ion, it can be determined, Mg(OH)(+) is the main active ingredient that activate flotation of quartz in the system of anionic collector dodecyl sulphate, and when magnesium hydroxide reaches a certain concentration, flotation of quartz began to be inhibited.
In this article, the technology for removing fluid inclusions in quartz by the microwave method was investigated, and the influences of the main technical factors on the removal efficiency were studied using the orthogonal test. The quartz samples under different microwave conditions were characterized employing Fourier transform infrared spectroscopy (FT-IR), Leica polarizing microscope, and differential thermal analysis (DTA). Finally, the microstructure and surface morphology of the quartz samples were characterized by X-ray diffraction (XRD). The results showed that the optimal microwave frequency, holding temperature and holding time for removing fluid inclusions were 1900 w, 1000 degrees C and 1 h, respectively. In addition, the phase transformation from beta-quartz to alpha-quartz was determined by the thermogravimetric analysis and XRD.
Effect of Y_2O_3-MgO addition on heterogeneous precipitation-thermal reduction synthesis and the sintering of Fe-Mo/Si_3N_4 powders has been investigated. It was found that the whiskers-like β-Si_3N_4, good wettability phases on Si_3N_4 surface, and high toughness Fe phase appeared in Fe-Mo/Si_3N_4 cermets with Y_2O_3-MgO additives. The results show that Y_2O_3-MgO additives can effectively optimize the microstructures of Fe-Mo/ Si_3N_4 cermets, and improve the material mechanical properties. Therefore, it indicated that Y_2O_3-MgO additives can be used for strengthening of sintered cermets, and the dual function of whiskers self-toughening and different metal-composition toughening can be achieved in Fe-Mo/Si_3N_4 cermets with Y_2O_3-MgO additives.