http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
장감용,박성하 한밭대학교 에너지청정기술연구소 2002 에너지청정기술논문집 Vol.2 No.1
최근에는 막분리법은 CO_2 가스의 분리·회수 효율을 증가시키는 방법으로 주목받고 있다. 본 연구에서는 CO_2 분리막에 적용하기 위하여 고온에서도 사용할 수 있는 세라믹막을 개발하였다. 알루미나 세라믹 지지체는 슬립캐스팅법으로 제작되었고, 세라믹 복합졸은 dip coating법으로 세라믹 지지체에 코팅되었다. 세라믹 코팅과 열처리 조건들이 결정되었다. Recently, the membrane method are being focused to increase the effect of the separation and recovery for CO_2 gas. In this stydy, the ceramic membrane was developed to apply the CO_2 separation membrane which could be used in th high temperature. The Al_2O_3-ceramic supports were prepared using the slip coating method. The ceramic composite sol was coated on the ceramic supports by the dip-coating. The conditions for ceramic coating and heat treatment were determined.
장감용,박성하 한밭대학교 에너지청정기술연구소 2001 에너지청정기술논문집 Vol.1 No.1
실리카는 화학적으로 안정하고 기공특성을 임의로 조절하는 것이 가능하며 촉매의 담체로 많이 이용된다. 또한 실리카에 담지된 금속성분은 내부기공표면에 고르게 분산되어 촉매의 활성을 증가시킨다. 본 연구에서는 폴리에틸렌 중합용으로 사용할 수 있는 촉매의 담체로 실리카를 선택하여 비표면적과 기공부피 등 실리카의 물성을 조절하여 촉매활성을 높이는 연구를 수행하였다. Silica is used frequently as a catalytic support because it is chemically stable and its pore properties are easily controllable. Metal components which are finely dispersed on the internal surface of silica increase catalytic activity. In this study, silica was selected as the catalytic support for the preparation of polyethylene and physical properties of silica such as specific surface area and pore volume were controlled to increase the catalytic activity.
염근창,고대진,장감용,이서영,김경남 大韓齒科器材學會 1994 대한치과재료학회지 Vol.21 No.1
In this study, the prepared glasses were heat-treated to precipitate the leucite crystal in order to control the thermal expansion coefficient which is an important property of dental porcelain powder. The effect of addition of Li₂O and Na₂O on the amount of the precipitated leucite crystal were also examined. The mixing ratio of the leucite-containing glass must be controlled to match the thermal expansion coefficient of dental porcelain to that of metal. The physical properties of the dental porcelain powder prepared in this study were characterized. The results of this study were obtained as follows : 1. Conditions for the preparation of the maximum amount of leuctie crystal were compostion L-2(2.0 wt% Li₂O added) heat-treated at 950℃. 2. The phase of the precipitated crystals was turned out to be the tetragonal leucite crystal. 3. Maximum relative crystallinity was 64.2% for composition L-2, heat-treated at 950℃. Its linear thermal expansion coefficient was 16.1×10-6/℃ in the range of room temperature to 500℃. 4. The optimum mixing ratio of the leucite-containing glass was 45% in order to match the thermal expansion coefficient of dental porcelain to that of metal. In this case, the thermal expansion coefficient of the prepared dental porcelain was 10.6×10-6/℃ (∼500℃). 5. The physical and chemical properties of the prepared dental porcelain were suitable for the requirements of ISO 6872 and 9693.
김형진,김지환,오희목,장감용,임경묵,심문보 한국환경과학회 2002 한국환경과학회지 Vol.11 No.9
Laboratory experiments were conducted to investigate the effect of ceramic-treated water on the inhibition of algal growth. The growth of Scenedesmus quadricauda and Chlorella vulgaris was enhanced by the ceramic-treated water in Allen medium containing high concentration of nutrients, but inhibited in natural water containing low concentration of nutrients. The growth of Oscillatoria tenuis and Microcystis aeruginosa was inhibited in both Allen medium and natural water. When comparing the effects of ceramic-treated water 1 (NC1) and 2 (NC2), the growth of O. tenuis and M. aeruginosa was somewhat enhanced by NC1, whereas inhibited by NC2. Therefore, it is suggested that NC2 can be more effective than NC1 in controlling the algal growth.
한원식,김영욱,이상호,장감용,이준근 한국세라믹학회 1985 한국세라믹학회지 Vol.22 No.4
The subcritical crack growth of sintered SiC is investigated under various corrosive atmospheres such as distilled water Murakami solution and saturated KOH solution. The KI-V diagrams are obtained by the load relaxation method and incremental displacement rate method using the double torsion technique. The obtained fracture mechanics parameters (n) of sintered SiC are 79 in Murakami solution and 39 in saturated KOH solution. These data indicate that the subcritical crack growth of sintered SiC is taking place in these two conditions and the stress-corrosion cracking is suggested to be the mechanism. With these KI-V diagrams the life of sintered SiC in these conditions is predicted.