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首页> 外文期刊>ISIJ international >Thermoelectric Properties of Rare Earth-doped SrTiO3 Using Combination of Combustion Synthesis (CS) and Spark Plasma Sintering (SPS)
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Thermoelectric Properties of Rare Earth-doped SrTiO3 Using Combination of Combustion Synthesis (CS) and Spark Plasma Sintering (SPS)

机译：燃烧合成（CS）和放电等离子体烧结（SPS）相结合的稀土掺杂SrTiO 3 的热电性能

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摘要

Thermoelectric properties of combustion synthesized and spark plasma sintered rare-earth-doped (La, Sm, Gd, Dy and Y) SrTiO_(3) was investigated from room temperature to 870 K from viewpoint of energy and time saving without deterioration in thermoelectric properties. All single phases of rare-earth-doped SrTiO_(3) were successfully synthesized and sintered with high densities. With temperature increasing, the absolute value of Seebeck coefficient of all the samples increased and the electric conductivity decreased; the power factor of all the samples decreased except Y-doped sample in the considering temperature range. In all the samples, the La-doped sample and the Y-doped sample had the highest and lowest power factor, respectively. The figure of merit of La-doped samples with different doping amounts was evaluated and the maximum figure of merit 0.22 was obtained at 800 K from Sr_(0.92)La_(0.08)TiO_(3) sample. Comparing Y and La-doped samples prepared by our synthesis method with that of conventional solid-state reaction method, the thermoelectric properties of our samples were relatively higher. Thus the combination of combustion synthesis and spark plasma sintering has a potential to prepare perovskite-oxide materials with relatively higher thermoelectric properties for high-temperature application.
机译：从能量和节省时间的观点出发，从室温到870 K的温度范围内研究了燃烧合成和火花等离子体烧结掺稀土（La，Sm，Gd，Dy和Y）SrTiO_（3）的燃烧热电性能，而不会降低热电性能。稀土掺杂SrTiO_（3）的所有单相均已成功合成并以高密度烧结。随着温度的升高，所有样品的塞贝克系数的绝对值增加，电导率降低。在考虑的温度范围内，除掺Y的样品外，所有样品的功率因数均降低。在所有样品中，La掺杂样品和Y掺杂样品分别具有最高和最低的功率因数。评估了不同掺杂量的La掺杂样品的品质因数，并在800 K下从Sr_（0.92）La_（0.08）TiO_（3）样品中获得了最大品质因数0.22。将通过我们的合成方法制备的Y和La掺杂样品与常规固态反应方法进行比较，我们的样品的热电性能相对较高。因此，燃烧合成和火花等离子体烧结的组合具有制备用于高温应用的具有相对较高的热电性质的钙钛矿氧化物材料的潜力。

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