摘要
自燃法结合气流粉碎工艺可以制备出平均粒径在2μm的Na1.7Co2-yO4(y=0～0.5)超细粉末。产物的XRD分析表明自燃法可以合成物相单一的Na1.7Co2-yCuyO4粉末材料。SEM观察表明自燃法制备的粉末体具有层状的结构。在Na1.7Co2O4热电材料的Co位中掺杂Cu提高了材料的Seebeck系数和材料的功率因子。该实验中,通过自燃法和热压烧结相结合的方法使得Na1.7Co2-yCuyO4热电材料的密度得到提高。
In this dissertation, thermoelectric oxide Na1. 7 Co2 O4 doped with Cu （0-0. 5mol） powder was synthesized by auto--ignition. The Na1.7 Co2-y Cuy O4 （y= 0-0. 5 mol） ultra fine powder with mean particle size of about 2. 094 um was successfully synthesized by auto-ignitioncombining with the airflow shatter process. X-ray diffraction showed that Na1. 7 Co2-yCuyO4 has formed by auto-ignition without distinguished impurity. The flaky architecture of Na1. 7 Co2-y CuyO4 was observed by the SEM. The Co-site of Na1. 7 Co2O4 doped with Cu improved the power factor and the Seebeck coefficient and electrical conductivity of Na1. 7 Coz-y CuyO4 thermoelectric materials. In this research, the density of Na1. 7 Co2-y CuyO4 TE material was enhanced through the auto-ignition combined with hot-press sintering method.
出处
《建材世界》
2012年第6期1-4,共4页
The World of Building Materials
关键词
热电材料
自燃法
SEEBECK系数
功率因子
thermoelectric materials
auto-ignition~ seebeck coefficient
power factor
