Introduction


Faculty:
Akihiro Yabuki, Takashi Ogi, Ratna Balgis,Indra Wahyudhin Fathona
         Kikuo Okuyama

We conduct researches in the production of functional fine- and nano-particles and thin films using aerosol and liquid process and the evaluation of related phenomena such as of fluid, heat transfer, chemical reaction of the gas-liquid, mass transfer inside the reactor, nucleation/growth, and clean technology. These topics are being investigated experimentally and theoretically using numerical simulation technique for the modeling. Currently, the following subjects are in progress: 1.a. Production of functional fine particles and thin films by aerosol process:
- super conductors, pigments, magnetic materials, ceramics, luminescent, batteries, ferroelectricity materials.
- fine particle materials (simple oxide, multi component oxide, metals)
- thin films materials (simple oxide, multi component oxide, metals) 1.b. Production of functional fine particles using spray pyrolysis and spray drying (droplet-to-particle conversion).
- fine particulate materials (oxides, multi component oxides, sulfides, metals) 2. Evaluation of dynamics behavior of the scale from cluster to micrometer particles related to charging, agglomeration, condensation, precipitation, etc. as well as their controls under specific condition such as high temperature and low pressure. 3. Coating process of functional fine particles by liquid method. 4. Numerical simulation on transport phenomena of gaseous and particulate inside the reactor during the process preparing fine particles and thin films materials 5. Development of method and devices related to clean-technologies.
- Development and evaluation of air cleaning equipment.
- Measurement of gaseous and particulate contaminants in chambers and rooms 6. Development of methods of measuring characteristics (concentration, size distribution, etc.) of gasborne clusters and nano-particles.
- Development of methods using Electrical Mobility Aerosol Analyzer (DMA), Condensation Nucleus Counter (CNC), Faraday Cup Electrometer (FCE),
- Development of method for measuring spatial distribution of particles by two-color polarization sensitive laser light scattering method 7. Cluster and particle formation from gaseous contaminants by ion-molecule reaction and radical reaction as well as by irradiation of radiation and UV light in atmosphere.
- Nano particle formation from gas by ion-induced and nucleation 8. Evaluation of the properties of particles-matrix (e.g, polymer) multicomponent materials.

Further information:
Akihiro Yabuki
Department of Chemical Engineering
Graduate School of Engineering, Hiroshima University
Kagamiyama 1-4-1
Higashi-Hiroshima 739-8527 Japan.
e-mail: ayaubki(a)hiroshima-u.ac.jp