• 제목/요약/키워드: Application materials

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Crystal Growth of Nax Zeolite in Aluminiumsilicate Gels

  • Kim, Ik-Jin;Ha, Jing-Pil;Kang, Seon-Myoung;Seo, Ding-Nam;Jung, Mi-Jeong;Moon, In-Ho
    • 한국결정성장학회:학술대회논문집
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    • 한국결정성장학회 1998년도 PROCEEDINGS OF THE 14TH KACG TECHNICAL MEETING AND THE 5TH KOREA-JAPAN EMGS (ELECTRONIC MATERIALS GROWTH SYMPOSIUM)
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    • pp.11-16
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    • 1998
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유기농 자재의 연용이 토양의 이화학적 성질과 토마토의 생육, 수량 및 체내성분에 미치는 영향 (Effect of Continuous Application of Organic Farming Materials on the Soil Physicochemistry Property and Plant Growth, Yield and Components of Tomato)

  • 오주성;이종성;강경희;김회태;정원복;정순재
    • 한국유기농업학회지
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    • 제9권1호
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    • pp.75-89
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    • 2001
  • This study the effects of the application of organic farming materials on the soil Physicochemistry property and plant growth, yield and components of Tomato were compared with conventional culture. The results obtained from the experiment are summarized as follows : 1. The effect of soil chemical properties after application organic farming materials, The amounts of pH and O.M. in N, P, K treated plot were few of change, To the contrary, fermentation compost and microorganisms fermentation compost treated plot were some increase, Amount of $P_2$$O_{5}$, Ca and K increase in comparison with the N, P, K treated plot. 2. Changes of soil microbial after application organic farming materials, The number of bacteria, actinomycetes and fungi in N, P, K treated plot were appeared definite direction. to the contrary, The number of bacteria and actimycetes in fermentation compost and microorganisms fermentation compost treated plot showed the increased tendency, The number of fungi showed the decreased tendency. 3. Effect of organic farming materials application on the growth and yield of tomato was superior in order of microorganisms fermentation compost plot〉 chemical fertilizers plot〉 fermentation compost plot. especially, chicken manure + microorganisms fermentation compost treated plot was the highest. 4. Effect of organic farming materials application on the components of tomato were not different.

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Processing of Porous Ceramics by Direct Foaming: A Review

  • Pokhrel, Ashish;Seo, Dong Nam;Lee, Seung Taek;Kim, Ik Jin
    • 한국세라믹학회지
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    • 제50권2호
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    • pp.93-102
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    • 2013
  • Macro porous ceramics possessing controlled microstructures and chemical compositions have increasingly proven useful in the industrial sphere. Their sintered structures have found application in both established and emerging, areas such as thermal insulation in buildings, filtration of liquids and molten materials, refractory insulation, bone scaffolds and tissue engineering. Stable ceramic foams can be formed by wet chemical methods using inorganic particles(e.g., $Al_2O_3$ or $SiO_2$). The wet foams are dried and sintered with improved porosity and mechanical properties. This review examines the different techniques used to prepare porous ceramics from ceramic foams, focusing on the explanation of this versatile method of direct foaming from the past to the present. Comparisons of the processes and the processing parameters are explained with the produced microstructures.

Fabrication and characterization of solution processable organosilane-modified colloidal titania nanoparticles and silica-titania hybrid films

  • Kang, Dong Jun;Park, Go Un;Lee, Hyeon Hwa;Ahn, Myeong Sang;Park, Hyo Yeol
    • Journal of Ceramic Processing Research
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    • 제13권spc1호
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    • pp.78-81
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    • 2012
  • Colloidal titania nanoparticles were synthesized by a simple sol-gel process. The obtained nanoparticles showed high crystallinity and were of the anatase type. These crystalline colloidal titania nanoparticles were organically modified using methyl- and glycidyl-grafted silanes in order to enhance their stability and solution processability. The stabilized colloidal titania nanoparticles could be dispersed homogeneously without aggregation and converted into silica-titania hybrid films with the heterogeneous Si-O-Ti bonds by a low-temperature solution process. The fabricated silica-titania hybrid films showed high transparency (~ 90%) in the visible range, and low RMS roughness (<1 nm). Therefore, the organosilane-modified crystalline colloidal titania nanoparticles can be used in solution-processable functional coatings for electro-optical devices.

Carbon Nanotube Synthesis and Growth Using Zeolite by Catalytic CVD and Applications

  • Zhao, Wei;Nam, Seo Dong;Pokhrel, Ashish;Gong, Jianghong;Kim, Ik Jin
    • 한국세라믹학회지
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    • 제50권1호
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    • pp.1-17
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    • 2013
  • Since their first discovery, carbon nanotubes (CNTs) have become a material central to the field of nanotechnology. Owing to their splendid physical, structural and chemical properties, they have the potential to impact a wide range of applications, including advanced ceramics, nanoelectronic devices, nanoscale sensors, solar cells, battery electrodes, and field emitters. This review summarizes the synthetic methods of preparing CNTs and focuses on the chemical vapor deposition (CVD) method, especially catalytic CVD. In order to stabilize and disperse the catalyst nanoparticles (NPs) during synthesis, zeolite was implemented as the template to support metal-containing NPs, so that both CNTs in the bulk and on a 2D substrate were successfully synthesized. Despite more challenges ahead, there is always hope for widespread ever-new applications for CNTs with the development of technology.

에너지 하베스팅용 압전 소재 및 특성 분석 (Piezoelectric Materials and Their Properties for Energy Harvesting)

  • 정순종;임동환;이대수;김민수
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2010년도 하계학술대회 논문집
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    • pp.333-333
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    • 2010
  • 압전형 에너지 하베스팅 소자는 외부에서 버려지는 기계적 진동 혹은 타격과 관련된 에너지로부터 전기 에너지를 획득할 수 있다는 잇점이 있다. 그러나 현재 이 방식으로부터 획득될 수 있는 에너지는 매우 작다는 단점이 있다. 이러한 문제들을 해결하기 위하여 본 연구에서는 두 가지 형태의 압전 소재를 제작하였다. 에너지 하베스팅 소자용 고효율 압전 세라믹와 결정배향된 세라믹을 제작하고 이에 대한 성능을 조사하였다. 결정 배향된 세리믹에서는 1 N의 외부 충격조건에서 소재가 100 V, 1 mW의 전력을 발생하였다.

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