类石墨相C_3N_4的高压电学特性  

Electrical Properties of Graphite Like C_3N_4 under High Pressure

作　　者：杨洁[1] 田红志[2] 韩永昊[3] 

机构地区：[1]空军航空大学基础部,长春130022 [2]吉林大学学报(信息科学版)编辑部,长春130012 [3]东南大学物理系,南京210096

出　　处：《吉林大学学报（理学版）》2007年第1期85-88,共4页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:1010400840404007)

摘　　要：利用在金刚石对顶砧(DAC)上的集成微电路技术,高压原位测量类石墨相C3N4的电阻.实验结果表明,在293K,5GPa和11GPa的压力点,电阻明显下降,与理论计算的结构相变压力点一致;在77K,5GPa压力点的电阻基本不变;11GPa压力点的电阻变化更明显.在21GPa压力点附近,C3N4的电阻发生突变,表明此时存在一个未知的相变.By means of the technique of microcircuit integrated on DAC, the resistances of graphite like C3N4 were in-situ measured under high pressures. At 293 K, the resistance of g-C3N4 decreased sharply at 5 GPa and 11 GPa respectively, which was consistent with the calculated result. And at 77 K, the resistance of g-C3N4 almost unchanged at 5 GPa, but it changed more sharply at 11 GPa. The rapid decrease of the resistance of g-C3N4 at 21 GPa maybe indicate an unknown phase transition.

关 键 词：类石墨相 高压 电阻 相变 

分 类 号：O521.21[理学—高压高温物理]