Effects of YSZ Additions on Thermoelectric Properties of Nb-Doped Strontium Titanate
Effects of YSZ Additions on Thermoelectric Properties of Nb-Doped Strontium Titanate
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DOI：
10.1007/s11664-010-1144-1
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发表时间：
2010-03
影响因子：
2.1
通讯作者：
Ning Wang;Huawei Li;Yaoshuai Ba;Yifeng Wang;C. Wan;K. Fujinami;K. Koumoto
中科院分区：
文献类型：
--
作者：
Ning Wang;Huawei Li;Yaoshuai Ba;Yifeng Wang;C. Wan;K. Fujinami;K. Koumoto
研究了低热导率的氧化钇稳定氧化锆（YSZ）对在Ar气氛中采用常规常压烧结方法制备的Nb掺杂SrTiO3块体材料热电性能的影响。 YSZ 的添加降低了热导率，但显着提高了电导率。然而，塞贝克系数几乎与 YSZ 含量无关。因此，ZT 值得到提高，并且含有 3 wt.% YSZ 的样品在 900 K 时显示出最大 ZT 值 0.21。此外，还详细研究了添加 YSZ 导致导热率降低和电导率提高的原因。
The effect of yttria-stabilized zirconia (YSZ) with a low thermal conductivity on the thermoelectric properties of Nb-doped SrTiO3bulk materials, which were fabricated by the conventional normal pressure sintering method in an Ar atmosphere, was examined. YSZ additions reduced the thermal conductivity but significantly enhanced the electrical conductivity. However, the Seebeck coefficient was nearly independent of YSZ content. Thus, theZTvalue was enhanced, and a sample with 3 wt.% YSZ displayed the maximumZTvalue, 0.21, at 900 K. Additionally, the reason for the reduced thermal conductivity and enhanced electrical conductivity by YSZ additions was investigated in detail.