CAJ | 학술논문

采用水热法合成纳米AgPb_(18)SbTe_(20)热电材料,研究反应温度和时间对其物相和形貌的影响.所得颗粒用X射线粉末衍射仪和扫描电镜进行表征,结果表明,水热法合成的纳米AgPb_(18)SbTe_(20)颗粒具有NaCl型结构,粒子直径为20～50 nm,其反应温度越高,得到纯相AgPb_(18)SbTe_(20)所需时间越短,纳米粒子长得越大.采用水热法合成的AgPb_(18)SbTe_(20)热电材料具有纳米结构及不同形貌,对提高热电材料的热电优值系数有重要意义.
채용수열법합성납미AgPb_(18)SbTe_(20)열전재료,연구반응온도화시간대기물상화형모적영향.소득과립용X사선분말연사의화소묘전경진행표정,결과표명,수열법합성적납미AgPb_(18)SbTe_(20)과립구유NaCl형결구,입자직경위20～50 nm,기반응온도월고,득도순상AgPb_(18)SbTe_(20)소수시간월단,납미입자장득월대.채용수열법합성적AgPb_(18)SbTe_(20)열전재료구유납미결구급불동형모,대제고열전재료적열전우치계수유중요의의.
Nano-structural thermoelectric material AgPb_(18)SbTe_(20) was synthesized by hydrothermal method for the first time. The effects of reaction temperature and time on the phase and morphology of the material were investigated. The resulting products were characterized by X-ray diffraction and scanning electron microscope. Results show that the nano-AgPb_(18)SbTe_(20) is of pure NaCl-type structure. The spherical-shaped particles are about 20 ～50 nm in diameter. The holding time necessary for obtaining the single phase of the materail decreases and the nano-particle size increases with the increase of reaction temperature. It is expected that the AgPb_(18)SbTe_(20) compounds with nanostructure and various morphologies synthesized by the hydrothermal method will effectively improve the figure of merit ZT.