Single Thermite-Type Combustion Synthesis of Fe2VAl for Thermoelectric Applications from Fe, V2O5 and Al Powders
Single Thermite-Type Combustion Synthesis of Fe2VAl for Thermoelectric Applications from Fe, V2O5 and Al Powders
复制标题
由 Fe、V2O5 和 Al 粉末单铝热剂燃烧合成用于热电应用的 Fe2VAl
DOI：
10.1016/j.jallcom.2014.05.137
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发表时间：
2014
影响因子：
6.2
通讯作者：
and Tomohiro Akiyama
中科院分区：
文献类型：
--
作者：
Keisuke Abe;Asami Kikuchi;Noriyuki Okinaka;and Tomohiro Akiyama
提出并研究了利用Fe、V2O5和Al粉末合成热电应用用Heusler合金Fe2VAl的单铝热剂型燃烧合成法（STCS），主要考察了产品的微观结构和热电性能。宏观上，STCS成功进行，下部生成Fe2VAl金属产物，上部生成渣状氧化铝。根据SEM观察和FE-EPMA分析的元素图谱图像，产物中含有0.4 mol%的球形Al2O3和1.0 mol%的角状AlN的分散夹杂物。与 Fe2VAl 的报道数据相比，室温下的导热系数约为一半。这可能是由于分散的 AlN&Al2O3 和产品的非化学计量导致声子散射增加； Fe2.06V1.01Al0.93。结果，产品的功率因数最大值为 99.6 μW m−1K−2，无量纲品质因数在 309 K 时为 2.19 × 10−3。
Single thermite-type combustion synthesis (STCS) for synthesizing Heusler alloy Fe2VAl from Fe, V2O5, and Al powders for thermoelectric applications was proposed and investigated, in which the microstructure and the thermoelectric properties of the product were mainly examined. Macroscopically, STCS was successfully carried out to produce metallic product of Fe2VAl in lower part and alumina as slag in upper part. According to SEM observation and FE-EPMA-analyzed, elemental mapping images, the product contained dispersed inclusions of spherical Al2O3with 0.4 mol% and angulated AlN with 1.0 mol%. In comparison to the reported data on Fe2VAl, the thermal conductivity at room temperature became about half. It could be because of increased phonon scattering due to dispersed AlN&Al2O3and non-stoichiometry of the product; Fe2.06V1.01Al0.93. As a result, the maximum values for the product were 99.6 μW m−1K−2in power factor and 2.19 × 10−3at 309 K in dimensionless figure of merit.