D相AlCuCo准晶各向异性热电势的测量  

Measurement of anisotropy thermopower of decagonal AlCuCo quasicrystal

作　　者：樊振军[1,2] 耿学文[1] 孔文婕[3] 金贻荣[2] 

机构地区：[1]中国地质大学(北京)材料科学与工程学院,北京100083 [2]中国科学院物理研究所,北京100190 [3]广西师范大学物理与电子工程学院,桂林541004

出　　处：《物理学报》2009年第10期7119-7123,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10334080)资助的课题~~

摘　　要：采用激光交流加热的方法测量了D相AlCuCo准晶周期与准周期两个方向的热电势,温度测量区间为300—1200K.通过测量发现沿周期方向的热电势符号为负,沿准周期方向的热电势符号为正;沿周期方向在1123K(850℃)热电势有一个跳变;在高温区,热电势并不是单调变化的;实验所用方法能比较灵敏地测量材料相变时的温度点.The thermopower of decagonal AlCuCo quasicrystal was measured in the periodic and quasiperiodic direction by laser heating alternating current measurement method in the temperature range of from 300 K to 1200 K.We found that the thermopower is negative in the periodic direction and positive in the quasiperiodic direction.The thermopower hopps at 1123 K（850 ℃）along the periodic direction.The change of the thermopower is not monotonic at high temperature.The measurement method we used is sensitive to the phase transition point.

关 键 词：AlCuCo准晶 高温 热电势 交流测量法 

分 类 号：TM933.23[电气工程—电力电子与电力传动]