• 제목/요약/키워드: excellent thermal stability

검색결과 297건 처리시간 0.028초

실리콘 산화막에 대한 Ta-Mo 금속 게이트의 열적 안정성 (Thermal Stability of Ta-Mo Alloy Metal on Silicon Oxide)

  • 노영진;이충근;김재영;홍신남
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2003년도 추계학술대회 논문집 Vol.16
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    • pp.3-6
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    • 2003
  • This paper describes the interface stability of Ta-Mo alloy metal on $SiO_2$ Alloy was formed by co-sputtering method, and the alloy composition was varied by controlling Ta and Mo sputtering power. When the atomic composition of Ta was about 91%, the measured work function was 4.2eV that is suitable for NMOS gate. To identify interface stability between Ta-Mo alloy metal and $SiO_2$, C-V, FE-SEM(Field Emission-SEM), and XRD(X-ray diffraction) were performed on the samples annealed with rapid thermal processor between $600^{\circ}C$ and $900^{\circ}C$. Even after $900^{\circ}C$ rapid thermal annealing, excellent interface stability and electrical properties were observed. Also, thermodynamic analysis was studied to compare with experimental results.

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함침법을 이용한 금속염의 연속 억제 효과 (Combustion Retardation Effects of Metal Salts Using Impregnation Method)

  • 송영호;강민호;정국삼
    • 한국안전학회지
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    • 제19권1호
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    • pp.77-80
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    • 2004
  • The purpose of this study was to examine effects of combustion retardation for paper filter impregnated metal salts by measurement of extinguishing concentration, CO concentration, and limiting oxygen index(LOI, ASTM D 2863). And thermal stability analysis using DSC was carried out. In case of extinguishing concentration, $NH_4H_2PO_4$ showed excellent effect of combustion retardation. The result of LOI measurement showed that metal salts possessed good effect of combustion retardation. And thermal analysis using DSC showed that these metal salts possessed thermal stability. In case of CO concentration, CO concentration was increasing because of imperfect combustion process due to combustion retardation effect of metal salts.

산화마그네슘 및 재유화형 분말수지를 사용한 시멘트계 불연단열재의 단열특성 (Insulation Property of Cement-based Non-combustible Inorganic Insulation Using MgO and Redispersible Polymer Powder)

  • 손배근;송훈
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2021년도 봄 학술논문 발표대회
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    • pp.120-121
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    • 2021
  • The organic insulation material has excellent thermal insulation property, but it is difficult to expect fire stability, and semi inorganic insulation only delays combustible hour but it is difficult to expect fire stability. In this study, thermal insulation property of cement-based non-combustible inorganic insulation using cement and non combustible materials and redispersible polymer powder was studied. As a result of the experiment, the thermal insulation property decreased as the use of redispersible polymer powder increased, but the heat insulation property improved when using the appropriate amount.

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New Cellulose-Based Photopolymer with High Thermal and UV Stability

  • Cho, Han-Dong;Park, Seo-Kyu;Jhun, Chul-Gyu;Kwon, Soon-Bum;Kurioz, Yu.;Reznikov, Yu.;Gerus, I.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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    • pp.853-856
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    • 2007
  • We report on the alignment properties of new cellulose based photopolymer. The LC alignment quality and image sticking property of the TN and IPS cells made by using the photopolymer were investigated. Thermal and UV stability of those properties were also investigated. Excellent LC alignment quality and stability were obtained particularly in IPS mode.

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무당거미와 나무껍질게거미줄의 열 안정성 및 기계적 성질에 관한 열처리 효과 (Heat Treatment Effects on the Thermal Stability and Mechanical Property of Spider Silks from Nephila clavata and Bassaniana decorata)

  • 장소연;이지혜;이주하
    • 한국응용곤충학회지
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    • 제48권1호
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    • pp.109-115
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    • 2009
  • 무당거미와 나무껍질게거미줄의 열 안정성 및 기계적 성질 등을 측정하고, 그 성질들을 합성 섬유인 아라미드(aramide)와 폴리에스테르(polyester) 등의 측정 결과와 서로 비교하였다. 열 안정성에서 거미줄은 비록 상업용 섬유로 사용되는 아라미드나 폴리에스테르에 비해서는 낮았지만 기계적인 성질에서는 폴리에스테르보다 월등 우수한 결과 값을 보여주었다. 거미줄에 포함되어 있는 수분이 열 안정성과 기계적 성질에 미치는 영향을 조사하기 위해 두 종류의 거미줄을 $100^{\circ}C$의 진공에서 각각 다른 시간 별로 열처리를 하였는데, 1.5시간 동안 열처리를 시킨 후의 열 안정성과 기계적 성질이 최고 값을 나타내었다.

Separation of Hydrogen-Nitrogen Gas Mixture by PTMSP/PDMS-PEI Composite Membrane

  • Lee, Hyun-Kyung;Kang, Tae-Beom
    • 한국막학회:학술대회논문집
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    • 한국막학회 2004년도 Proceedings of the second conference of aseanian membrane society
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    • pp.148-151
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    • 2004
  • The development of the gas separation processes using polymeric membranes has attracted a great deal of interest during the last two decades. Membrane in this application has to offer an excellent thermal stability, chemical/solvent resistance, and mechanical strength under operating conditions.(omitted)

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폴리히드록시아미드와 그 치환체의 고리화 반응(I) (Thermal Cyclization of Aromatic Polyhydroxyamides and its Derivatives(I))

  • Kim, Eun-Kyoung;Kim, Myung-Kyoon;Baik, Doo-Hyun
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 2002년도 봄 학술발표회 논문집
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    • pp.347-350
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    • 2002
  • Wholly aromatic polybenzoxazoles(PBO) are well established as high performance materials with excellent thermal stability and mechanical properties. Heterocyclic precursor polymers such as polyhydroxyamides(PHA) have been interested in the field of high performance flame retardant polymers.[1] Precusor polymers have the advantages that they are easier to process, don't require strong solvents and can adsorb large amounts of heat energy during the cyclization process. (omitted)

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PHA 및 그 유도체의 열적 고리화 거동 고리화 거동(I) - 모델화합물 연구 - (Thermal Cyclization of PHA and its Derivatives(I) - Model compound study -)

  • Kim, Eun-Kyoung;Kim, Myung-Kyoon;Baik, Doo-Hyun
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 2001년도 가을 학술발표회 논문집
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    • pp.361-363
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    • 2001
  • Aromatic pelybenzoxazoles(PBOs) display excellent thermal stability plus good solvent and chemical resistance. Wholly aromatic PBOs, in fact, are soluble only in strong acids(e.g., sulfuric, rmethanesulfonic, triflic, and polyphosphoric acids). However, fully heterocyclized polymers have shown some drawbacks in solubility and processing. This problem of processing is currently being exploited to obtain unusual combinations of physical properties in fibers and films. (omitted)

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Synthesis of Poly(enaryloxynitriles) Containing Schiff Bases and Their Thermal Properties

  • 김상곤;한양규;공명선
    • Bulletin of the Korean Chemical Society
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    • 제16권4호
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    • pp.326-331
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    • 1995
  • Poly(enaryloxynitriles) containing Schiff bases were prepared from p-bis(1-chloro-2,2-dicyanovinyl)benzene (2) and various aromatic diols having Schiff base moiety by interfacial polymerization. The chemical structure of the polymers was confirmed through synthesis of their corresponding model compounds. All the polymers were soluble in polar aprotic solvents and their brittle films were cast from DMF solution. They showed a large exotherm around 340 ℃ attributable to the chemical change of dicyanovinyl group. Especially, curing of azomethine group was observed to occur at 390 ℃ by differential scanning calorimetry. According to the thermogravimetric analyses, they exhibited excellent thermal stability with 60-90% residual weight at 500 ℃ in nitrogen.