A Study on Improving Indium Leaching Rate from Lead Dust

JIANG Xin-yu;ZHOU Chun-shan

Rare Metals and Cemented Carbides | Vol., Issue 3, 2001 | pp. 17-19

The recovery of In from lead dust was investigated.The use of new leaching process by sulfating calcination and water leaching has resulted in leaching rate of In more than 87%.

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Influence of Active Spheroidization Agent on the Morphology of Cobalt Oxalate

GAO Jin;CHEN Qing-lin

Rare Metals and Cemented Carbides | Vol., Issue 3, 2001 | pp. 20-22

Study is made of the influence of active spheroidization agent on the morphology of the cobalt oxalate.Analysis is made of the microstructures of industrial cobalt oxalate and spheroidial cobalt oxalate by X-diffractmeter and their morphology is observed under scanning eletron microscope.The experiment results showed addition of active spheroidization agent can result in distinct morphology change with better physical properties on the prerequisite of unchanged crystalline structure of the cobalt oxalate.

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Catalytic Synthesis of DOP,DOM and DOA with Ln_2O_3/ZrO_2 Catalyst

CHEN Qi-rui;SHAO Ming-xia

Rare Metals and Cemented Carbides | Vol., Issue 3, 2001 | pp. 23-26

The catalytic synthesis of DOP,DOM and DOA with catalyst Ln 2O 3/ZrO 2 (Ln=Nd,Sm,Er),prepared by coprecipitation-calcination method,has resulted in distinct efficiency improvement and due to its larger specific surface area and better dispersion by～60% less carrier Ln 2O 3 consumption compared with pure Ln 2O 3.

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Considerations to be Given in the Study of Metallurgical Reaction Kinetics

SUN Zhao-ming;ZHAO Zhong-wei

Rare Metals and Cemented Carbides | Vol., Issue 3, 2001 | pp. 27-29

According to some documents concerned,this paper has analyzed a few problems liable to be overlooked in the study of metallurgical reaction kinetics,the reasons for the problems occurred.The paper also proposed considerations to be given in the study of metallurgical reaction kinectics.

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Sol-Gel Process and Its Application for Preparation of Metallic Oxide Powder and the Coating

QIN Pei-yu;ZHOU Shi-quan

Rare Metals and Cemented Carbides | Vol., Issue 3, 2001 | pp. 30-33

Three types of Sol-Gel methods used in manufacturing metallic oxides were analyzed in this paper: gelation Sol-Gel method, organo-metal polyment Gel method and organo-polymer Silica-Gel method,their suitable applications were also reviewed.The paper focused on the discussion on powder agglomeration and coating crack propagation during oxide ceramic manufacturing.

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Present Status and Technical Development of China's Cobalt Powder Industry

CHEN Qing-lin

Rare Metals and Cemented Carbides | Vol., Issue 3, 2001 | pp. 34-38

The paper describes the present production status,technical development and quality of cobalt powder.Suggestions are made on the development orientation of cobalt powder production with reference to the foreign cobalt powder production processes and foreign/domestic technical development of the cobalt powder

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Review of Ta/Nb Industry

GAO Jing;QU Nai-qin

Rare Metals and Cemented Carbides | Vol., Issue 3, 2001 | pp. 39-41

The global development of the world Ta/Nb industry from 1990 s'to June 2000 s'was reviewed.Brief description is made of the main new applications of the Ta/Nb Products.

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Present Status and Development of Nanostructured Materials

SHE Jian-fang

Rare Metals and Cemented Carbides | Vol., Issue 3, 2001 | pp. 42-45

Producton process of nanostructured materials is introduced.Market development of nanostructured materials is analyzed.

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Application of Ti and Its Alloy in Non-aerospace Industries

HUANG Hong

Rare Metals and Cemented Carbides | Vol., Issue 3, 2001 | pp. 46-49

The Present status of Ti and Ti alloy is reviewed.Discussion is made on their application in non aerospace industries,such as sports apparatus,automobiles,plate armour,buildings and computer disk chips,etc.

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Discussion of Modern Design Method of the Mechanical Products

LONG Hui

Rare Metals and Cemented Carbides | Vol., Issue 3, 2001 | pp. 50-52

The paper describes the modern design method of mechanical product.Introduction is made to the detailed procedures of optimized design of mechanical products by modern design method.

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