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Zou G.-L.,University of Science and Technology Beijing | Zou G.-L.,Jiangxi University of Science and Technology | Wu Y.-D.,Jiangxi University of Science and Technology | Deng Z.-M.,Ganzhou Nonferrous Metallurgy Research Institute | Cai S.-J.,University of Science and Technology Beijing
Energy Education Science and Technology Part A: Energy Science and Research | Year: 2014

In-Situ leaching technology is the latest method of leaching weathered crust elution deposited rare earth ore by arranging liquid injecting and collecting liquid system such as lixiviant solution of ammonium sulfate injection hole, ammonium sulfate and rare earth ion chemical reaction on ore surface, the leach liquor was collected from the liquid supply hole, the leach liquor of rare earth was precipitated. However, for the deposit base stunted ionic rare earth mine, the adoption of this method is often caused due to leakage of deposit base and resources of groundwater contamination leaching solution seepage losses. In-Situ leaching method based on the basic principle of weathered crust elution deposited rare earth ore constructed liquid injecting and collecting allocation model. The leakage area can be determined by using the model, thus reduce or even avoid seepage of groundwater pollution and resource loss. © Sila Science. All rights reserved. Source

Hao C.,Jiangxi University of Science and Technology | Hao C.,HIGH-TECH | Yuan D.,Jiangxi University of Science and Technology | Yuan D.,Ganzhou Nonferrous Metallurgy Research Institute | And 2 more authors.
Applied Mechanics and Materials | Year: 2011

W-Cu precursor was prepared by chemical precipitation. Then the superfine W-Cu composite powder was prepared by roasting and hydrogen reduction process. The composite powder sample were characterized by SEM and XRD. The experimental results show that component uniform and stabilising ratio W-Cu precursor can be prepared by controlling pH of solution, then W-20%Cu uhrafine composite powder was prepared by hydrogen reduction proces, The sizes of three compositions in the powder(Cu 0.4W 0.6, W and Cu)was to nanometer, in which the size of Cu 0.4W 0.6 and W was 40nm while the size of Cu was 70nm. © (2011) Trans Tech Publications, Switzerland. Source

Wang L.,Central South University | Wang L.,Ganzhou Nonferrous Metallurgy Research Institute | Liu S.,Central South University | Huang K.,Central South University | And 3 more authors.
Journal of Rare Earths | Year: 2011

Nanoscale Lu 2O 3:Eu 3+ phosphor was prepared by a modified solution combustion method using urea and acrylamide monomer. The particle sizes and photoluminescent properties of nano-phosphor were closely related to the molar ratio of urea-to-RE nitrates and acrylamide monomer-to-RE nitrates. The as-prepared samples with the sizes of 9.6-11.6 nm were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and energy dispersive spectrometer. Lu 2O 3:Eu 3+ nano-phosphor that depicted high photoluminescence in the size around 10 nm was reported. Compared with the sample prepared by solid state reaction, the photoluminescence of sample was increased sufficiently to be 45.1. The emission spectra of the samples presented the typical emission from 5D 0 level to 7F J (J=0, 1, 2, 3, 4) level of the Eu 3+ ion. © 2011 The Chinese Society of Rare Earths. Source

Wang L.,Central South University | Wang L.,Ganzhou Nonferrous Metallurgy Research Institute | Huang K.,Central South University
Chemistry Bulletin / Huaxue Tongbao | Year: 2010

Using ligand metal ion exchanger as chiral mobile phase additives , L-phenylalanine and copper sulfate solution as chiral ligand mobile phase, the thermodynamic properties of the resolution of ofloxacin enantiomers on C 18 HPLC column was investigated at the temperature ranged from 293 to 313K. Experimental results showed that, in the experimental temperature range, the retention time, separation factor and selectivity of the enantiomers were reduced with the increasing temperature; plotting lnk' to 1/T got a V ant Hoff curve with good linearity relations, of which the correlation coefficient R > 0. 999. The enthalpy change, enthalpy change difference, entropy change and other thermodynamic parameters of the separation of ofloxacin enantiomers on HPLC column were calculated. In the experimental temperature range, the ofloxacin enantiomers met | ΔS,R Δ H° | > | T Δ S,R S° | to show that the process of chiral separation was an enthalpy-controlled process. Source

Tian H.,Wuhan University of Technology | Ye C.,Ganzhou Nonferrous Metallurgy Research Institute | Bao X.,Gannan Normal University
Advanced Materials Research | Year: 2013

The origin and damage of curing residual stress were firstly investigated briefly in this paper.And then Fiber Bragg Grating (FBG) sensors with different central wavelength were used to test the temperature sensitivity and the strain sensitivity. At last, the naked and encapsulated FBG sensors were layed parallelling into prepreg to monitor the whole curing process, and the results clearly showed the situation change of strain, the appearance of gel point and glass transition temperature. © (2013) Trans Tech Publications, Switzerland. Source

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