(1) Xi’an Jiaotong University, 710049 Xi’an, China
Abstract:
The effects of gas, pressure and temperature on the production of amorphous carbon nanotubes were investigated using an arc
discharging furnace at controlled temperature. Co/Ni alloy powder was used as catalyst. The discharge current was 80 A and
voltage was 32 V. The optimal parameters were obtained: 600°C temperature, hydrogen gas and 500 torr pressure. The productivity
and purity of amorphous carbon nanotubes are 6.5 gram per hour and 80%, respectively. The diameter of the amorphous carbon
nanotubes is about 7–20 nm.