승화결정성장로의 감압속도가 탄화규소 단결정 성장에 미치는 영향

김종표,김영진,김형준,Kim, Jong-Pyo,Kim, Yeong-Jin,Kim, Hyeong-Jun 한국결정학회 1992 韓國結晶學會誌 Vol.3 No.1

단결정 a-SiC성장시 결정성장로의 감압속도가 결정 성장 속도, 결정성, 성장방향에 미치는 영향 을 고찰해 보기 위해서 승화법으로 (001)면 a-SiC 단결정 종자정위에 단결정 a-SiC를 성장시켰다. 결정성장 초기에는 성장로의 빠른 감압 속도에 따라 결정성장속도가 빨라지고 3C-SiC 다결정이 종자정위에 성장하였고, 감압속도를 느리게 한 경우에는 결정성장 속도가 느려지고 6H-SiC 단결정이 성장하였다. 초기에 단결정층이 성장하는 조건 하에서 2시간 성장후의 단면 성장 양상을 보면, 종자정 하단에서 발생하는 낙은 종자정의 연속적 인 승화 때문에 종자정과 초기의 단결정층이 소멸 되고, 종자정이 놓여있던 혹연 도가니의 바닥으로부터 연속적으로 다결정 층이 성장된 것이 관찰되었다. 그러나, 이러한 종자정의 승화 소멸은 초기 성장 후 냉각과정을 거치고 다시 승온시키는 두 단계 공정을 사용함으로써 효과적으로 억제시킬 수 있었다. 이와같은 방법으로 장시간 성장시킨 결정은 6H-HiC 단결정이었으며, (001) 방향으로 성장하였다. a-SiC crystals were grown on the (001) plane of a-SiC seed crystals by sublimation method to find effects of pressure-reduction rate of the crystal growth furnace own the growth rate and orientstion of grown SiC crystals. Pressure-reduction rate at the initial growth stage affected the crystallinity of grown SiC crystals. In case of high pressure-reduction rate, growth rate was high and 3csic polycrystalline was grown on the seed. On the other hand, low pressure-reduction rate caused the growth rate to be slow and 6H-SiC single crystal was grown on the seed. However, even after growing SiC for 2 hours under the condition in which.

다공성의 $La_{0.6}Sr_{0.4}Ti_{0.3}Fe_{0.7}O_{3-{\delta}}$가 코팅된 $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ 관형 분리막의 제조 및 투과 특성

김종표,표대웅,박정훈,이용택,Kim, Jong-Pyo,Pyo, Dae-Woong,Park, Jung-Hoon,Lee, Yong-Taek 한국막학회 2012 멤브레인 Vol.22 No.1

다공성 $La_{0.6}Sr_{0.4}Ti_{0.3}Fe_{0.7}O_{3-{\delta}}$로 코팅된 $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ 관형 분리막은 압출성형 및 dip coating 방법으로 제조 되었다. 코팅된 관형 분리막의 특성은 X-선 회절분석기(XRD)와 전자 주사 현미경(SEM)을 이용하여 분석하였으며, 분석결과 $2{\mu}m$의 다공성 코팅 층을 갖는 페롭스카이트 구조임을 알 수 있었다. 산소투과량 분석은 $750{\sim}950^{\circ}C$ 범위에서 공급측과 투과 측을 대기 중 공기와 진공으로 하여 수행되었다. 다공성의 $La_{0.6}Sr_{0.4}Ti_{0.3}Fe_{0.7}O_{3-{\delta}}$로 코팅된 $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ 관형 분리막의 산소투과량은 $950^{\circ}C$에서 $3.2mL/min{\cdot}cm^2$로 코팅되지 않은 분리막보다 높게 나타났으며, 11일 동안의 장기 안정성 실험결과 코팅 층에 의해 안정성이 증가됨을 알 수 있었다. Tubular $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ membranes with $La_{0.6}Sr_{0.4}Ti_{0.3}Fe_{0.7}O_{3-{\delta}}$ porous coating layer were prepared by extrusion and dip coating technique. XRD and SEM result showed the tubular membrane possessed the perovskite structure and porouscoating layer (thickness= about $2{\mu}m$) in surface. The oxygen permeation test was measured at condition of ambient air (feed side) and vacuum (permeate side) in the temperature range from 750 to $950^{\circ}C$. The oxygen permeation flux of $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ tubular membrane with $La_{0.6}Sr_{0.4}Ti_{0.3}Fe_{0.7}O_{3-{\delta}}$ porous coating layer reached maximum $3.2mL/min{\cdot}cm^2$ at $950^{\circ}C$ and was higher than non-coated $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ tubular membrane. Long-term stability test result indicated that the oxygen permeation flux was quite stable during the 11 day.

도시공원 수공간의 디자인 형태 및 특성 분석에 관한 연구 - 경상남도 도시공원을 중심으로 -

김종표,김용수,임원현,Kim, Jong-Pyo,Kim, Yong-Soo,Lim, Won-Hyeon 한국조경학회 2007 韓國造景學會誌 Vol.35 No.2

This case study offers fundamental data for the research and construction of future of water. It also provides an understanding of the design and characteristics of the existing water bodies in urban parks. This study was begun by conducting field research on the completion of the construction of 67 different urban parks located in the downtown areas of the following cities: Gimhae, Yangsan, Changwon, Masan, and Jinju. The field research was conducted from July to October of 2006. Additional research was performed in July of 2007. Construction trends were examined and the design and characteristics of the types of locations, shapes, scales, materials, and added objects for the enhancement of recreational value of the 31 water bodies constructed in 18 urban parks out of the 67 were analyzed. According to the results of the study, the most common design feature was a fountain that shot up. The bodies of water were designed by using a simple technique in accordance with the basic principles of location, shape, size, materials, and added objects for the enhancement of recreational value, with the exception of a few different factors in the research subjects. In conclusion, it can be recommended that further research be conducted in the consideration and various plans of location, shape, size, materials, and added objects for the enhancement of recreational value of future constructions of water bodies in urban parks in order to offer a more pleasant environment to the users.

공급 측과 투과 측 조건에 따른 $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ (BSCF) 관형 분리막의 산소투과 특성

김종표,박정훈,이용택,최영종,Kim, Jong-Pyo,Park, Jung-Hoon,Lee, Yong-Taek,Choi, Young-Jong 한국막학회 2011 멤브레인 Vol.21 No.2

$Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ (BSCF) 조성을 갖는 치밀한 관형 분리막은 압출 성형 방법으로 제조하였다. $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ 관형 분리막의 구조적 특성은 x-선 회절분석기 (XRD)와 전자 주사 현미경 (SEM)을 이용하여 분석하였으며, 상대밀도는 94.10%를 보였다. 산소투과량 분석은 700~$950^{\circ}C$ 범위에서 공급 측과 투과 측의 운전조건에 따라 측정되었다. 공급 측과 투과 측에서 대기 중 공기와 진공펌프를 사용할 경우, $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ 관형 분리막의 산소투과량은 $900^{\circ}C$에서 1.37 mL/$min{\cdot}cm^2$로 높게 나타났다. Dense tubular $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ (BSCF) membranes were prepared by extrusion technique. The phase structure of the $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ membranes was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). Relative density of $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ tubular membrane was 94.10%. Oxygen permeation was measured at difference operating condition of feed side and permeate side in the temperature range from 700 to $950^{\circ}C$. The oxygen permeation flux of dense tubular $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ membrane reached maximum 1.37 mL/$min{\cdot}cm^2$ at $900^{\circ}C$ exposed to ambient air (feed side) and vacuum pump (permeate side).

세라믹 정밀여과막의 계면활성제 처리 효과

김종표(Jong Pyo Kim),남현희(Hyun Hee Nam),유종훈(Jong Hoon Ryu),김재진(Jae Jin Kim),배재흠(Jae Heum Bae),김정호(Jeong Ho Kim),권영돈(Young Don Kwon) 한국공업화학회 2001 공업화학 Vol.12 No.5

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대학 캠퍼스 조경 수목관리 전산화 방안에 관한 연구

김종표(Kim, Jong-Pyo),김용수(Kim, Yong-Soo),김동주(Kim, Dong-Joo) 한국교육시설학회 2007 敎育施設 Vol.14 No.2

In modern society, the role of university becomes diversified and the concerns on building construction or landscape architecture considering beautiful landscape and scene are increasing caused by increasing interest on external environment of campus. But relative importance of concerns for the context of landscape architecture in campus is neglected rather than other facilities. So the landscape architecture service could not be conducted well. Therefore the computerization of system or management program will be needed for effective landscape architecture tree management and sufficiency of concerns on continuously increasing landscape architecture in campus. The computerization of landscape architecture tree management will be important roles not only to raise the efficiency of landscape architecture management and the view of outdoor environment but also to increase the competitive power of rapidly changing university environment and the quality of education.

한외여과막을 이용한 함유 세척수의 처리

김종표(Jong Pyo Kim),김재진(Jae Jin Kim),전명석(Myung Suk Chun),전성덕(Sung Duk Jeon),민병렬(Byoung Ryul Min),정건용(Kun Yong Chung) 大韓環境工學會 1999 대한환경공학회지 Vol.21 No.5

원주 지역 정치권력 구조에 대한 사례연구

김종표(Jong-pyo Kim),양진석(Jin Seok Yang) 연세대학교 빈곤문제국제개발연구원 2005 地域發展硏究 Vol.14 No.-

La0.6Sr0.4B0.2Fe0.8O3-δ(B=Co, Ti) 분리막의 산소투과특성 및 안정성 비교

김종표(Jong Pyo Kim),박정훈(Jung Hoon Park),김기영(Ki Young Kim) 한국에너지기후변화학회 2007 에너지기후변화학회지 Vol.2 No.2

La0.6Sr0.4B0.2Fe0.8O3-δ(B=Co, Ti) oxide was synthesised by citric acid method and polymerized complex method respectively. Dense membranes of perovskite oxide have been prepared using as prepared powder by pressing and sintering at 1,300℃. Precursor was investigated by TGA and XRD. La0.6Sr0.4Co0.2Fe0.8O3-δ(LSCF-6428) was showed SrCO3 existed as impurity at 850°C, however indicated single phase perovskite structure at 1300℃. On the other hand, La0.6Sr0.4Co0.2Fe0.8O3-δ(LSTF-6428) was showed single phase perovskite structure at above than 800℃. The oxygen was permeated at temperatures from 700℃ to 950℃ by mixed conducting through oxygen vacancy diffusion in the dense membrane. The oxygen permeation flux increased with increasing temperature. In the result of LSCF-6428 was measured higher than LSTF-6428 to be 0.46 ㎖/minㆍ㎠ at 950℃. La0.6Sr0.4Co0.2Fe0.8O3-δ(B=Co, Ti) membrane after oxygen permeation were maintained perovskite structure and the surface of permeate-side was showed intact grain boundary.

스포츠관여도에 따른 스포츠영웅의 실증적 요인 분석

김종표 ( Jong Pyo Kim ),서명제 ( Byung Se Suh ),김찬룡 ( Chan Ryong Kim ) 동의대학교 스포츠과학연구소 2002 스포츠과학연구논문집 Vol.1 No.-

this study was enforced with questionnaires of 429 men and women high school students in Busan for analyzing factors for sports hero depending on the sex and degree of involvement in sports and analyzed the factors based on the gathered data. According to sex, women subjects answer more various factors for sports hero than men. While the groups having high degree of involvement in sports choose a moral senses as the most important factor for becoming sports hero, the groups having low degree of involvement in sports answer that the degree of contribution in society is most important for becoming sports hero. Specific conclusion is like followings. 1) In case of men`s group highly involving sports, the subjects answered that the most necessary factors for becoming sports hero is a moral sense, and then the degree of contribution in society, strong leadership, and differentiation. 2) In case of men`s group less involving sports, the subjects answered that the most necessary factors for becoming sports hero is the degree of contribution in society, and then differentiation, strong leadership, and a moral sense. 3) In case of women`s group highly involving sports, the subjects answered that the most necessary factors for becoming sports hero is a moral sense, and then strong leadership, the degree of contribution in society, differentiation, and superior record. 4) IN case women`s group less involving sports, the subjects answered that the most necessary factors for becoming sports hero is the degree of contribution in society, and then differentiation, a moral sense, strong leadership, and familarity.