Electrical conductivity and current-voltage characteristics of alumina with or without neutron and electron irradiation
Electrical conductivity and current-voltage characteristics of alumina with or without neutron and electron irradiation
复制标题
有或没有中子和电子辐照时氧化铝的电导率和电流-电压特性
DOI：
10.1016/s0022-3115(98)00339-0
复制
发表时间：
1998
影响因子：
3.1
通讯作者：
C. Kinoshita
中科院分区：
文献类型：
--
作者：
K. Shiiyama;M. Howlader;S. Zinkle;T. Shikama;M. Kutsuwada;S. Matsumura;C. Kinoshita
原位测量的电导率和电流-电压（I-V）特性的单晶和多晶氧化铝已进行了在HFIR（高通量同位素反应器;橡树岭国家实验室）在723 K与或没有中子辐照和高压电子显微镜（HVEM）从室温到723 K与或没有1 MeV的电子辐照。在中子和电子辐照下观察了所有试样的辐射诱导电导率（RIC）。电子辐照下的RIC随着电子通量的增加而增加。在中子和电子辐照下，分别达到>2 dpa和9.1×10−5dpa时，没有灾难性的体电导率或表面电导率下降。非欧姆的I-V行为观察到所有标本有或没有中子和电子辐照。辐照前后的I-V特性相似。根据电极材料与试样材料的功函数差异，讨论了非欧姆行为的原因。
The in situ measurement of electrical conductivity and of current–voltage (I–V) characteristics of single- and poly-crystal alumina have been carried out both in HFIR (high flux isotope reactor; Oak Ridge National Laboratory) at 723 K with or without neutron irradiation and in a High Voltage Electron Microscope (HVEM) from room temperature to 723 K with or without 1 MeV electron irradiation. Radiation induced conductivity (RIC) was observed for all specimens under neutron and electron irradiation. The RIC under electron irradiation increased with increasing electron flux. There was no catastrophic bulk or surface conductivity degradation under neutron and electron irradiation up to >2 dpa and 9.1×10−5dpa, respectively. Non-ohmic I–V behavior was observed for all specimens with or without neutron and electron irradiation. The I–V behavior with irradiation was similar to that without irradiation. The reason for non-ohmic behavior is discussed on the basis of the difference of work function between electrode and specimen materials.