Zn、Pr共掺In_2O_3陶瓷材料的高温热电传输性能

The high temperature transport and thermoelectric properties of the Zn,Pr co-doping In_2O_3 ceramics

利用放电等离子SPS烧结工艺制备得到Zn、Pr共掺的In2O3多晶陶瓷材料。通过研究材料的热电传输性能和微观结构,发现共掺工艺对SPS烧结的In2O3陶瓷材料的传输性能有着显著的影响,其结构为多孔结构。低浓度共掺的样品在测试温度范围内能够得到较高的电导率(约100S/m)和热电势(约200μV/K)。其中试样In1.92(Pr,Zn)0.08O3的热导率973K最低为2.5W/(m.K),该样品可获得最高的热电功率因子3.5×10-4 W/(m.K2),对应其热电优值0.10。其性能表明利用放电等离子SPS烧结工艺制备的In2O3基陶瓷作为n型高温热电材料具有很好的潜力。

The polycrystalline In2O3 ceramics co-doped with Zn,Pr were prepared through the spark plasma sintering process.Both thermoelectric transport properties and microstructure of the ceramics were investigated.The co-doped In2O3 by SPS had a remarkable effect on the transport properties.Large electrical conductivity（about100S/m） and thermopower（about 200μV/K） was observed in dilute Co doped sample.The maximum power factor was found in In1.92（Pr,Zn）0.08O3 sample as 3.5 ×10-4 W/（m·K2） at 973 K with the ZT value up to 0.10.It reveals that In2O3 polycrystalline ceramics prepared by a spark plasma sintering thus can be a good candidate for n-type thermoelectric materials.