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首页> 外文会议>International Symposium on East Asian Resources Recycling Technology（EARTH 2005); 20051109-15; Beijing(CN) >Preparation of Nano-Size Nd_2O_3 from NdFeB Magnet Scrap by Sol-Gel Process
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Preparation of Nano-Size Nd_2O_3 from NdFeB Magnet Scrap by Sol-Gel Process

机译：溶胶-凝胶法从钕铁硼废料制备纳米级Nd_2O_3

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摘要

In this study, nano size neodymium oxide powders were prepared by sol-gel process and calcinations of gel from neodymium nitrate solution prepared from acid leaching solution of NdFeB magnet scrap. Mole ratio of neodymium and organic acid, 1:2 was appropriate for sol-gel process. When gel powder prepared by sol-gel process was calcinated to obtain neodymium oxide, crystallity of neodymium oxide increased with increasing of calcination temperature. The kind of organic acid as gelation agent played important role in the shape of neodymium oxide. In the case of citric acid, neodymium oxide had sponge type t hat had no relation with calcination temperature. But in the case of malonic acid, neodymium oxide had sponge type under 900℃ of calcination temperature, and fractionized nano-size particles above 1000℃. It was possible to prepare nano-size neodymium oxide by sol-gel process.
机译：在这项研究中，通过溶胶-凝胶法制备了纳米级氧化钕粉末，并从由NdFeB磁铁废料的酸浸溶液制备的硝酸钕溶液中煅烧了凝胶。钕与有机酸的摩尔比为1：2适用于溶胶-凝胶法。将通过溶胶-凝胶法制备的凝胶粉末煅烧以获得氧化钕时，氧化钕的结晶度随着煅烧温度的升高而增加。有机酸作为胶凝剂的种类在氧化钕的形状中起重要作用。在柠檬酸的情况下，氧化钕具有海绵型，与煅烧温度无关。但在丙二酸的情况下，氧化钕在900℃的煅烧温度下呈海绵状，在1000℃以上的温度下呈纳米级颗粒。可以通过溶胶-凝胶法制备纳米级氧化钕。

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