Review of rare earth oxide (nano and micro sized crystalline) materials: Preparation from rare earth chlorides, characterisation and applications

IF 4.8 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
Shengnan Lin , Tingan Zhang
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引用次数: 0

Abstract

Due to the exceptional performance and irreplaceable nature of materials containing rare earth metals, their application across various fields of modern society is increasingly widespread. China possesses substantial reserves and abundant resources of rare earth elements, which confer a unique edge in their research and application. However, challenges such as an oversupply of low-end products and a shortage of high-end products hinder the advancement of processing science and technology. For the first time, this paper provides a comprehensive summary of the current processes used worldwide, and research for the preparation of rare earth oxides (REOs) from rare earth chlorides (RECs), and analyses the advantages and disadvantages of these processes. To address the issues of the need for additional conversion agents and wastewater discharge in the preparation of REOs from RECs, this review based on previous work proposes the preparation of REOs through ion membrane electro-conversion based on the chlor–alkali industry and discusses their development and application. Finally, the paper forecasts the future development trends in the preparation processes of REOs.

Abstract Image

稀土氧化物(纳米和微晶)材料综述:稀土氯化物制备、表征和应用
由于含稀土金属材料的优异性能和不可替代性,其在现代社会各个领域的应用日益广泛。中国稀土储量巨大,资源丰富,在研究和应用方面具有独特优势。然而,低端产品供大于求、高端产品短缺等挑战阻碍了加工科技的发展。本文首次全面综述了国内外以稀土氯化物为原料制备稀土氧化物的工艺及研究现状,并分析了各种工艺的优缺点。针对RECs制备REOs需要添加转化剂和废水排放等问题,本文在总结前人研究成果的基础上,提出了基于氯碱工业的离子膜电转化制备REOs的方法,并对其发展与应用进行了探讨。最后,对reo制备工艺的未来发展趋势进行了展望。
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来源期刊
Hydrometallurgy
Hydrometallurgy 工程技术-冶金工程
CiteScore
9.50
自引率
6.40%
发文量
144
审稿时长
3.4 months
期刊介绍: Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on case histories and operational difficulties. Topics covered include: leaching of metal values by chemical reagents or bacterial action at ambient or elevated pressures and temperatures; separation of solids from leach liquors; removal of impurities and recovery of metal values by precipitation, ion exchange, solvent extraction, gaseous reduction, cementation, electro-winning and electro-refining; pre-treatment of ores by roasting or chemical treatments such as halogenation or reduction; recycling of reagents and treatment of effluents.
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