摘要
采用高压放电的方式对材料进行击穿,可以方便地制造纳米颗粒.搭建了高压击穿实验装置,对铜丝进行高压击穿实验;分别采用透射电子显微镜(TEM)、扫描电子显微镜(SEM)和元素能谱(EDS)、X射线衍射(XRD)测试,对铜丝击穿丝状物进行了形貌和成份分析.研究了铜丝高压击穿后的物相特性.研究结果发现,在高压作用下铜丝被充分电离,产生丝状分布,其构成为纳米颗粒的凝结;纳米颗粒的直径分布主要集中在30—60nm之间;颗粒产物由铜元素和氧元素组成;它们以单晶Cu,Cu2O和CuO组成混合物;粒径大小、产物成分与铜丝长度、直径及电压等因素相关.
Copper nanoparticles are produced by high-voltage electrical explosion of copper wires. The high-voltage breakdown experimen- tal setup for copper is built. The morphology and composition of the breakdown material are tested by the transmission electron mi- croscopy （TEM） and scanning electron microscopy （SEM）, and X-ray diffraetometry （XRD） and energy dispersive spectroscopy（EDS） methods, respectively. Based on the morphology, size distribution, elemental spectrum （EDS）, and XRD analysis of the breakdown material, the phase characteristics of high-voltage breakdown copper wire are studied. The results show that wire is fully ionized under high pressure, forming a filamentous distribution which is composed of condensation of nanoparticles. The diameters of copper nanoparticles are between 30 nm and 60 nm. The nanoparticles product is composed of Cu and O elements. The product is a mixture of metallic copper, cupric oxide and cuprous oxide. The particle size and its product composition are controlled by varying length and diameter of the copper wire, discharge voltage, etc.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第22期308-313,共6页
Acta Physica Sinica
基金
国家自然科学基金重大项目(批准号:60890200)
国家自然科学基金委员会-中国工程物理研究院联合基金(批准号:10976017)资助的课题~~
关键词
高压击穿
纳米颗粒
物相分析
high-voltage electrical explosion method, nanosized copper powder, phase analysis
