| 분무연소합성(SCS)법에 의한 나노크기 산화아연(ZnO) 콜로이드의 제조 |
| 이상진, 이상원, 전병세 |
| 경남대학교 신소재공학부 |
| Fabrication of Nano-sized ZnO Colloids from Spray Combustion Synthesis (SCS) |
| Sang-Jin Lee, Sang-Won Lee, Byung-Sei Jun |
| Division of Advanced Materials Engineering, Kyungnam University |
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| ABSTRACT |
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Nano-sized ZnO colloids were prepared by use of spray combustion method. for combustion reaction, $Zn(NO_3)_2{cdot}6H_2O$ and $CH_6N_4O$ were employed as an oxidizer and a fuel. Exothermic peak was shown at $230^{circ}C$ by DTA/TGA, and it was considered as a combustion reaction followed by ignition of the precursor mixture. In case of spray combustion method, because insufficient contents of molecules and radicals generated from precursor droplets may lead an incomplete igmition, the ignition temperature of combustion chamber was chosen at $500^{circ}C$. For diminishing aerosol coagulation, the droplet number concentration was reduced by filter media. The fluid was laminar with 2.5 seconds of aerosol residence time. The synthesized colloids had spherical shape with 180 nanometer size, and the crystalline phase was ZnO with hexagonal structure. |
| Key words:
Spray Combustion Synthesis(SCS), Nano-sized ZnO, Ignition, Aerosol coagulation, Laminar flow |
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