Synthesis of Cubic Ni nanoparticles by electric current heating method using Ni wire
Nickel wire was used as a starting material to fabricate Ni nanoparticles.A glass substrate was placed above the wire to deposit the particles.The wire was heated by applying a d.c.voltage in the range of 2.2 ~ 4.0 V in oxygen atmosphere until the wire broke.White deposits were observed on the substrate after the heating.The TEM observation revealed that the deposits consisted of cubic nanoparticles with the edge lengths of 2 ~ 200 nm.The size of the particle tended to decrease with decreasing voltage.The particles were covered with films of approximately 4 nm in thickness.After reducing in hydrogen at 250℃ for 30 min,the thickness of the films on the cubic particles decreased and the XRD peak intensity attributed to NiO decreased.Consequently the particles were found to be cubic Ni nanoparticles covered with NiO thin films.
Electric current heating Transmission electron microscope Cubic nanoparticle Multilayer ceramic chip capacitor
Ikuhisa Tada Tomoichiro Okamoto Yuichiro Kuroki Takumi Hagizawa Keiichiro Oh-ishi Masasuke Takata
Department of Electrical Engineering,Nagaoka University of Technology 1603-1 Kamitomioka,Nagaoka,Niigata 940-2188,Japan
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
132-135
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）