Thermoelectric properties of MgTi2O5/TiN conductive composites prepared via reactive spark plasma sintering for high temperature functional applications
Thermoelectric properties of MgTi2O5/TiN conductive composites prepared via reactive spark plasma sintering for high temperature functional applications
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DOI：
10.1016/j.scriptamat.2019.11.008
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发表时间：
2020-03
影响因子：
6
通讯作者：
Hyoung-Won Son;Quansheng Guo;Yoshikazu Suzuki;Byung‐Nam Kim;T. Mori
中科院分区：
文献类型：
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作者：
Hyoung-Won Son;Quansheng Guo;Yoshikazu Suzuki;Byung‐Nam Kim;T. Mori
在这项研究中，MgTi 2 O 5基复合材料的热电性能进行了研究。10-30体积%添加TiN作为导电增强相。采用反应放电等离子烧结技术，在1373 K下烧结10 min成功制备了MgTi 2 O 5/TiN复合材料。目前的SPS工艺本身提高了MgTi 2 O 5的电导率超过250倍，同时有效地抑制了热传导的缺陷工程。此外，复合进一步显着提高其导电性，因此实现了热电功率因数和ZT值的大幅度提高。研究结果为MgTi_2O_5的掺杂提供了一种新的技术，并可提高其它绝缘氧化物材料的热电性能。
In this study, thermoelectric properties of MgTi2O5-based composites were investigated. 10–30 vol.% TiN were added as a conductive reinforcement phase. MgTi2O5/TiN composites were successfully synthesized at 1373 K for 10 min via reactive spark plasma sintering. The present SPS process itself enhanced electrical conductivity of MgTi2O5more than 250 times while effectively suppressing thermal conduction by defect engineering. Moreover, compositing further remarkably improved its electrical conductivity, and hence large enhancements in the thermoelectric power factor andZTvalue were achieved. The results indicate a new doping technique in MgTi2O5and enhancing thermoelectric properties of other insulating oxide materials.