摘要
用GS-1B型六面顶压机研究了ZnO纳米晶高压下的晶粒演化和性能,用X射线衍射仪和场发射扫描电子显微镜对高压样品的晶粒尺寸、微观形貌进行了表征.结果表明,高压下ZnO纳米晶存在压致晶粒碎化效应.硬度和伏安特性实验表明,高压调制后样品的显微硬度约是常压烧结样品硬度的2·3倍,非线性伏安特性明显优于常压烧结样品.
Grain fragmentation and property modification of nanocrystalline ZnO under high pressure were studied on CS-1B 6 × 8000 kN cubic high pressure apparatus. Grain size and microstructure of the samples have been characterized by X-ray diffraction and field emission scanning electron microscopy. The results show that the significant grain fragmentation phenomenon occurs inside the crystallites. Experimental results on hardness and the current-voltage characteristics indicate that micro-hardness of the samples after high pressure is 2.3 times that of the samples sintered at atmospheric pressure and the nonlinear current-voltage characteristics is obviously better than that of the latter.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第1期472-476,共5页
Acta Physica Sinica
基金
国家自然科学基金(批准号:50171059
50325103)资助的课题~~
关键词
氧化锌纳米晶
高压
压致碎化
非线性伏安特性
ZnO nanocrystals, high pressure, pressureinduced grain fragmentation, nonlinear current-voltage characteristics
