High-rate production of nanomaterials using modulated inductively coupled thermal plasmas
We have developed a unique method for synthesizing functional nanopowder using pulse-modulated induction thermal plasmas (PMITP) with a high production rate. In this method, the PMITP is used with time-controlled feeding of feedstock (TCFF). Feedstock is intermittently supplied into the PMITP synchronously during a high input power duration, while the supply of feedstock is stopped during the low input power duration. This method can offer highly efficient evaporation of the feedstock, and highly efficient nucleation of nanoparticles. This PMITP+TCFF method provides various oxide nanoparticles with a production rate of 400 g/h at 20 kW, and Si nanoparticles/nanowires. Furthermore, two-dimensional spectroscopic observations were conducted to elucidate the production and transport process of atoms and precursor molecules for nanoparticles.
- 1 Faculty of Electrical, Information & Communication Engineering, Institute of Science and Engineering, Kanazawa University