Effect of Temperature and Time in Preparation of Nd-Fe Alloys Using NdF3-Ca-CaCl2-Fe Reaction System.
Effect of Temperature and Time in Preparation of Nd-Fe Alloys Using NdF3-Ca-CaCl2-Fe Reaction System.
复制标题
NdF3-Ca-CaCl2-Fe 反应体系制备 Nd-Fe 合金时温度和时间的影响。
DOI：
10.2473/shigentosozai.110.1197
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
J. Shim
中科院分区：
文献类型：
--
作者：
J. Byun;Yeun;J. Shim
NdF3-Ca-CaCl2-Fe 混合物中各物质之间的相互作用已通过简单的热分析技术进行了初步研究。在 760•` 1,070•Ž 温度范围内测试了温度和时间对混合物小规模制备 Nd-Fe 合金的影响。研究发现，即使在710℃的低温下，通过固体NdF3和CaCl2的相互溶解，也已经形成了含Nd离子的熔盐，因此即使在金属Ca的熔点以下也能快速实现还原。 CaCl2熔化后（约760•Ž），两分钟内90%以上的NdF3被还原。金属Ca熔化前未能获得高合金回收率的原因是固体Ca阻碍了Nd-Fe合金颗粒沉降到坩埚底部形成的合金池中。为了在短时间内获得最大回收率，重要的是尽可能快地将炉料混合物加热至 Ca 的熔点。
Interactions among the species in the NdF3-Ca-CaCl2-Fe mixture have been primarily investigated by employment of a simple thermoanalytical technique. Effects of temperature and time on the small scale preparation of Nd-Fe alloys from the mixture have been tested in a temperature range of 760•` 1,070•Ž. It was discovered that the molten salt containing Nd ions was already established even at a low temperature as 710•Ž by mutual dissolution of solid NdF3 and CaCl2, hence the reduction was achievable fast even at below the melting point of metallic Ca. More than 90% of the NdF3 was reduced within two minutes as soon as the melting of CaCl2 (around 760•Ž). The reason why were not obtainable high alloy recoveries prior to the melting of metallic Ca was that the solid Ca hindered Nd-Fe alloy granules to settle down to the alloy pool formed on the bottom of the crucible. In order to obtain the maximum recovery within short time, it is important to heat the charge mix to the melting point of Ca as rapid as