高温区塞贝克系数简易测量装置的研制
Fabrication of a simple apparatus for the Seebeck coefficient measurement in high temperature region
摘要：
本文介绍了一种测量300-620 K温度范围内塞贝克系数（$α$）的简易装置。我们的设计适用于表征具有不同几何形状的样品，如圆盘和棒状。该装置的样品保持器组件已被设计成这样的方式，即用于样品加热目的的单个加热器足以在样品上提供自保持的温度梯度（1-10 K）。$α$的值是在没有明确测量温度梯度的情况下获得的。整个设备由常用材料制成，因此在任何损坏的情况下都可以更换任何部件。市售标准镍（Ni）金属样品已被用作校准仪器的参考材料。实验观察到的值$α$由我们的设备给出了类似的温度依赖性的行为，在文献中报道。为了研究氧化物材料的热电性能，采用溶液燃烧法合成了LaCoO多晶$_{3}$粉末样品，并对其热电性能进行了研究。在300-600 K温度范围内，对样品的热电性能进行了表征.
英文摘要：
A simple apparatus for the measurement of Seebeck coefficient ($α$) in the temperature range 300-620 K has been fabricated. Our design is appropriate for the characterization of samples with different geometries like disk and rod shaped. The sample holder assembly of the apparatus has been designed in such a way that, single heater used for sample heating purpose is enough to provide a self maintain temperature gradient (1-10 K) across the sample. The value of $α$ is obtained without explicit measurement of temperature gradient. The whole apparatus is fabricated from the materials, which are commonly available, so that any part can be replaced in case of any damage. Commercially available standard Nickel (Ni) metal sample has been used as a reference material for calibration of the instrument. The experimentally observed value of $α$ by our apparatus gives the similar temperature dependent behavior as reported in the literature. In order to study the thermoelectric behavior of oxide materials, we have synthesized polycrystalline LaCoO$_{3}$ powder samples by using solution combustion method and investigated the thermoelectric properties. Temperature dependent thermoelectric behavior of these samples were characterized in the temperature range 300-600 K.
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