• 제목/요약/키워드: Ar Gas

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혼합가스용기폭발 원인에 대한 고찰 (Discussions on the Cause of Mixed Gas Cylinder Rupture)

  • 윤재건
    • 한국가스학회지
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    • 제15권6호
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    • pp.51-56
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    • 2011
  • 울산의 한 실험실에서 3년 전에 혼합가스용기(80% 아르곤 20% 산소)가 파열되었다. 그러나 파열의 원인이 명확하게 규명되지 못하였다. 이 논문은 공인 감정기관의 감정서와 경찰의 수사결과보고서를 토대로 사고시나리오를 제시하여 보았다. 폭발은 혼합가스 용기 내에서의 화학반응에 의하여 발생한 것으로 판단된다. 이는 고압산소용기의 파열사고들과 유사한 것으로 사료된다.

$C_4F_6$-Ar혼합기체에서의 Plasma Discharge Simulation을 위한 $C_4F_6$ 초기단면적 결정 (Determination of the initial cross-sections for the $C_4F_6$ molecule from the electron drift velocity)

  • 이경엽;전병훈
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2011년도 제42회 하계학술대회
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    • pp.1544-1545
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    • 2011
  • For quantitative understanding of gas discharge phenomena, we should know electron collision cross section. Processing plasma etching of semiconductor, and research are being used in the etching source $C_4F_6$ gas may be used by itself and mixed with other gases are also used. However, the molecular gas $C_4F_6$ study on the characteristics of the electron transport and the cross-sectional area of the decision is still lacking. Therefore, we understand the electron transport characteristics and analysed the electron transport coefficients. And to understand and interpret physical properties of the ionization coefficient ${\alpha}$/N, and the attachment coefficient ${\eta}$/N in $C_4F_6$ gas.

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스퍼터링 증착에 의한 $PbTiO_3$ 박막제조시 증착변수의 영향 (Effects of Deposition Parameters on Sputter Deposition of Lead Titanate Thin Films)

  • 김상섭;강영민;백성기
    • 한국세라믹학회지
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    • 제30권7호
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    • pp.578-588
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    • 1993
  • Highly c-axis oriented ferroelectric PbTiO3 thin films were deposited on MgO single crystal substrates by RF magnetron sputtering. We have studied the effects of substrate temperature, RF input power, gas comosition, gas pressure and deposition rate on the chemical and structural characteristics of PbTiO3 thin films. The epitaxy relationship of c-axis oriented films was found to be PbTiO3{100}//MgO(100) and their microstructures were highly mosaic. It was found that the most important parameter to achieve epitaxial PbTiO3 films was the substrate temperature. The activation energy for the epitaxy formation was about 0.92eV. Lower gas pressure and RF input power were favorable for the formation of epitaxial c-axis orientation. It was also found that the optimum oxygen content in Ar gas was 10% to obtain the stoichiometric PbTiO3 composition.

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RF 스퍼터링으로 Si 기판위에 제작된 ZnO 박막에서 ZnO 버퍼층의 가스분위기 영향 (Effects of the Gas Atmosphere of ZnO Buffer Layers in the ZnO films grown on Si Substrates by RF Magnetron Sputtering)

  • 박태은;조형균;공보현;홍순구
    • 한국전기전자재료학회논문지
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    • 제18권7호
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    • pp.656-661
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    • 2005
  • The effects of gas atmosphere and in-situ thermal annealing in buffet layers on the characteristic of the ZnO grown by RF magnetron sputtering have been investigated. It was shown that the introduction of buffer layers grown at the gas atmospheres of the mixed $Ar/O_2$ and the in-situ thermal treatment of the ZnO buffer layer improved the structural and optical properties. In addition, the ZnO films on the buffer layer thermal-annealed at $N_2$ gas ambience showed the strong emission of the near band gap exciton with narrow linewidth by combining the high-temperature growth of the ZnO film.