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Study and Testing of Property and Particle Size of Ion Exchange Resins

WEN Jun-jie;ZHANG Qi-xiu;LI Jian;ZHANG Gui-qing
Rare Metals and Cemented Carbides | Vol., Issue 3, 2006 | pp. 20-22
The property and particle size of SP-1,SP-2 and SP-C new complex ion exchange resin is studied and tested with laser particle size analyzer and SEM. The results shows that the effective size and uniform coefficient for SP-1,SP-2 and SP-C are respectively 161.12 μm ＆1.36;129.7 μm ＆1.67 and 130.79 μm ＆1.73. The observation results through SEM show the fine particles come from the cracked resin.
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Application and Latest Development of W-Cu Composite Materials

FAN Jing-lian;PENG Shi-gao;LIU Tao;CHENG Hui-chao
Rare Metals and Cemented Carbides | Vol., Issue 3, 2006 | pp. 30-35
Descrlption is made of the W-Cu composite materials in respect of its performance such as good thermal and electric conductivity and high-temperature oxidization-resistance,its wide applications in the high-tech fields of electron sealing,integrated circuit, national defense military, aerospace. In the paper is introduced the main applications and latest development of new technology of the W-Cu materials both at home and abroad.
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Development and Application of RE Mg Alloy

YU Qiang-guo;WENG Guo-qing
Rare Metals and Cemented Carbides | Vol., Issue 3, 2006 | pp. 36-38
Description is made of the present development of RE Mg alloy both at home and abroad. The property and applications of the said alloy are detailed. Based on the comparison of processes for preparation of RE Mg master alloy, the currently-applicable new process is introduced. Meanwhile, some comments are made on the future development of the RE Mg alloy in China.
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Azo-phosphor RE Developer and Its Application in Photometric Analysis

YU Xiu-lan;WANG Zhi-chang
Rare Metals and Cemented Carbides | Vol., Issue 3, 2006 | pp. 39-45
The paper describes the azo-phosphor RE reagent for photometric analysis, focusing on the various developers and their developing reaction systems, corresponding the maximum length of the absorption wave , molar absorption factor, detection limit,interference and application by corresponding photometric analysis methods.
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Development of Non-magnetic Cemented Carbide

GAO Hai-yan
Rare Metals and Cemented Carbides | Vol., Issue 3, 2006 | pp. 51-54
In this paper,the development of non-magnetic cemented carbide is reviewed. Detailed description is made of the principle, process and key techniques for the preparation of non-magnetic cemented carbide. The paper summarizes the difficulties and problems in the preparation of non-magnetic cemented carbide. Its future development is also explored.
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Latest Development of Electrode Materials for Thermal Battery

XU Xiao-jing;DUAN Bai-hua;QU Xuan-hui;LI Ping
Rare Metals and Cemented Carbides | Vol., Issue 3, 2006 | pp. 55-59
The current status in the study of electrode materials for the thermal batteries is reviewed in this paper. Detailed description is made of the characteristics of advanced anode and cathode materials, especially the synthesis mechanism,property and microstructure of Li-B alloy. The future development of thermal batteries is explored.
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The Analysis of Projecet Investment Decision-making on the Basis of Option Valuation Theory

LI Xin-yin;ZHANG Bo
Rare Metals and Cemented Carbides | Vol., Issue 3, 2006 | pp. 60-62
Brief of the economi troduction and introduction is ma c investment activ application of de ity of the NPV（net present value） me , analysis is option valuation made of the theory, and it limitation thod. In of NPV view of the actual characters met expounds the practica hod, focusing on the in bility of these decision making model as well as more problems.
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