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Research and Development of Rare Metal Fine Chemicals─Inorganic Non-metal Material

ZHANG Wen-pu
Rare Metals and Cemented Carbides | Vol., Issue 2, 1995 | pp. 37-41
Rare metal fine chemicals are widely used for new inorganicnon-metal materials,so they are very important for the developmentof modern advanced scientific technology.This paper briefly describesthe recent research and development of new rare metal-containinginorganic non-me tal ma tenals and corresponding fine chemicals.Somerelated literatures are presented for reference.
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Recent Application & Development of Rare Earth Organic Chemicals

CHENG Ben-cheng;LI Zu-guang
Rare Metals and Cemented Carbides | Vol., Issue 2, 1995 | pp. 42-46
This paper presents a survey of application of rare earthorganic chemicals in the field of paint,plastics.functional materialsand other industries in recent years.With the further development ofthe above application and the exploitation of new application,rared,earth organic chemicals are expected to be used even more widely.
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Resources,Production and Application of Scandium

LIU Shi-you
Rare Metals and Cemented Carbides | Vol., Issue 2, 1995 | pp. 57-61
The paper introduces the mineral resources of Sc in the diff-erent countries.of the world,raw materials for production of Sc andits producing technology.lt describes in detai I the ap.plications of Scand its compounds in the fields of national defence, metallurgy,electronics,chemica 1 indus try,glasses,aerospace and aeronau ties,nuclear energy, superconductor,electriCal light sources,medicene and other indus-tries, and forecasts the application development,and gives a suggestionfor elploitation of Sc mineral resources in our country.
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Combined Determination of Cobalt and Nickel inCemented Carbide by EDTA Direct Titration

LI Xi-chun
Rare Metals and Cemented Carbides | Vol., Issue 1, 1995 | pp. 9-11
This paper describes the combined determination of Co-Niin ammoniac ined'ium using M X as indicator and EDTA as titratant.Its Ni can be determine6 by EDTA titration from another part of samesample Co of which is covered' first with (NH4)2S2O8. This method hasbeen used for the determination of Co, and Ni in cementeds carbi ewith satisfactory results.
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Analysis of Al_2O_3 Additive for Doped Tungsten Powders

GUO Xiu-shuang
Rare Metals and Cemented Carbides | Vol., Issue 1, 1995 | pp. 12-13
The content of Al2O3 additive is accurately and rapidlydetermined by volumetric analysis-complex titration, the problem oflong analysis period by gravimetric analysis is solved. By comparison,the said method was proved to be accurate, reliable, simple, feasible andeffective for production. The determination limit ranges from 25 to100g/L the error is about 0.5g/L, and the analysis period is within 30minutes.
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