http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
강우승 ( Woo Seung Kang ) 한국부식방식학회(구 한국부식학회) 2012 Corrosion Science and Technology Vol.11 No.4
The effects of volume fraction (15-30%) of SiC particulate reinforcements on the corrosion behavior of SiCp/7091 Al conposites in the 3.5% NaCl solution were studied by electrochemical techniques and scanning electron microscopy. The results showed that the amount of SiC particulate reinforcements did not cause much difference in the corrosion behavior of SiCp/7091 Al composites but the corrosion rate was proportional to the amount of SiCp reinforcement, And numerous pits and severe dissolution of the matrix was observed probably due to the discontinuities and galvanic effects between Al matrix and SiC reinforcements.
물분해용 Fe2O3/Na2Ti6O13/FTO 박막 제조 및 특성평가
윤강섭 ( Kang Seop Yun ),구혜경 ( Hye Kyung Ku ),강우승 ( Woo Seung Kang ),김선재 ( Sun Jae Kim ) 한국부식방식학회(구 한국부식학회) 2012 Corrosion Science and Technology Vol.11 No.2
One dimensional (1D) Na2Ti6OIi nanorods with 70 nm in diameter was synthesized by a molten salt method. Using the synthesized nanorods, about 750 nm thick Na2TisO,3 film was coated on Fluorine-doped till oxide (FTO) glasss substrate by the Layer-by-layer self-assembly(LBL-SA) method in which a repetitive self-assembling of ions containing an opposite electric charge in an aqueous solution was utilized. Using the Kubelka-Munk function, the band gap energy of the ID-Na2Ti6O13 nanorods was nalyzed to be 3.5eV. On the other hand, the band gap energy of the Na2Ti6O13 film coated on FTC) was found to be a reduced value of 2.9eV, resulting from the nano-scale and high porosity of the film processed by LBL-SA method, which was favorable for the photo absorption capability, A significant improvement of photocurrent and onset voltage was observed with the Na2Ti6O13 film incorporated into the conventional Fe203 photoelectrode: the photocurrent increased from 0.25 to 0.82 mA/cm2, the onset voltage decreased from 0.95 to 0.78 V.
1D-Na<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> 합성 변수에 따른 미세구조 및 밴드 갭 에너지 변화
윤강섭,구혜경,강우승,김선재,Yun, Kang-Seop,Ku, Hye-Kyung,Kang, Woo-Seung,Kim, Sun-Jae 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.8
Nano-structured one-dimensional $Na_2Ti_6O_{13}$ particles were synthesized by a molten salt process. Effects of processing parameters on the microstructure and band gap energy of the $Na_2Ti_6O_{13}$ powder were studied in this paper. For the synthesis of the $Na_2Ti_6O_{13}$ particles, two different raw materials of tubular shaped Na-titanate (Na-TiNT) and spherical shaped $TiO_2$ were utilized. Synthesizing with the raw material of Na-TiNT, around 70nm thick 1D-$Na_2Ti_6O_{13}$ with the bandgap energy of 3.5 eV was obtained at $810^{\circ}C$. Below $810^{\circ}C$ or without the presence of NaCl, 1D-$Na_2Ti_6O_{13}$ was in a relatively short in length and agglomerated state. With the processing temperature increased, the thickness of the 1D-$Na_2Ti_6O_{13}$ was also observed to be increased. On the other hand, when $TiO_2$ was employed as a raw material, the mixed amount of $Na_2CO_3$ played an important role in transforming the morphology and phase of the raw material, affecting the bandgap energy of the synthesized product. Specific surface area of the synthesized 1D-$Na_2Ti_6O_{13}$ was significantly affected by the raw and mixed materials as well as processing temperature. When Na-TiNT was processed at $810^{\circ}C$ with NaCl, the specific surface area of the 1D-$Na_2Ti_6O_{13}$ showed the best value of 30.63 $m^2/g$.
윤선진,허영무,한무근,정민영,강우승,Yoon, Seon-Jin,Heo, Young-Moo,Han, Mu-kun,Jung, Min-young,Kang, Woo-Seung 한국금형공학회 2014 한국금형공학회지 Vol.8 No.2
The narrow-pitched connectors are of interest for small-scale devices such as smart phones because of theirs caling. We conducted an injection molding analysis and a warp analysis for 0.3mm and 0.5mm pitch FPC connectors. We obtained a volumetric shrinkage of 4.344%, a clamping force of 0.2529 tonne, a maximum injection pressure of 76.3 MPa as optimized molding conditions for the 0.3mm pitch FPC connector. We found that, compared with the traditional injection molding technique, the injection molding for narrow-pitched connectors comes with distinct features like low clamping force, high injection molding pressure, and narrow gate size. Adding to the optimization analysis, the deflection of 0.5mm pitch FPC connector was analyzed as well. A maximum deflection of 0.053mm was calculated, which the actual deflection of 0.062mm was compared to. The results deduced a relative error of 17%. We conclude that the deflection analysis along with the optimization analysis can be used as an effective tool to predict the behavior of narrow-pitch connectors although the relative error may need to improve.