Alternative route for the preparation of CoSb3 and Mg2Si derivatives
Alternative route for the preparation of CoSb3 and Mg2Si derivatives
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DOI：
10.1016/j.jssc.2012.03.070
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发表时间：
2012-09-01
影响因子：
3.3
通讯作者：
Zawadzka, K.
中科院分区：
文献类型：
--
作者：
Godlewska, E.;Mars, K.;Zawadzka, K.
已开发出三锑化钴和二硅化镁衍生物的替代生产路线。将元素粉末以化学计量比混合，冷压成圆柱形预成型件，并在无氧环境中加热以引发放热反应。根据DTA/TG测量和在高温显微镜下的观察，反应的开始发生在不超过更易挥发的组分的熔点的温度下，即在CoSb 3的情况下为锑，在Mg 2Si的情况下为镁。另外对反应产物进行热处理以确保均质化。致密的烧结体通过在中等温度和压力条件下对所获得的粉末进行热单轴压制而获得。在所提出的技术中确定了几个优点：没有液相，合成时间相对较短，原位或非原位掺杂和晶粒尺寸控制的可能性。(C)2012 Elsevier Inc. All rights reserved.
An alternative manufacturing route has been developed for cobalt triantimonide and magnesium disilicide derivatives. Elemental powders were mixed in stoichiometric proportions, cold pressed into cylindrical preforms and heated in oxygen-free environment to initiate the exothermic reaction. According to DTA/TG measurements and observations under high-temperature microscope, the onset of reaction occurred at a temperature not exceeding the melting point of the more volatile component, i.e. antimony in the case of CoSb3 and magnesium in the case of Mg2Si. The reaction products were additionally heat treated to secure homogenization. Dense sinters were obtained by hot uniaxial pressing of the obtained powders in moderate temperature-and-pressure conditions. Several advantages were identified in the proposed technology: absence of liquid phases, relatively short time of the synthesis, possibility of in-situ or ex-situ doping and grain size control. (C) 2012 Elsevier Inc. All rights reserved.