검색결과

검색조건
좁혀보기
검색필터
결과 내 재검색

간행물

    분야

      발행연도

      -

        검색결과 2

        1.
        2006.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Silicon carbide whiskers (SiCw) having the diameter in the range of 20-80 nm were synthesised from coconut fibres through sol-gel process. The coconut fibres were impregnated with tetraethoxysilane and methyltriethoxysilane derived sol and pyrolyzed at 1400℃ in argon. X-ray of the pyrolyzed samples showed the formation of β-SiC.
        4,000원
        2.
        2004.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        A study of partial carbonisation of green pitch fibres to temperatures in the range of 500-1000℃ was carried out on three precursors - a neat pitch and two polymer modified pitches, with a view to find out a suitable temperature at which the fibres acquire considerably improved toughness or handleability (compared to that in the green stage) for their subsequent processing into carbon fibres. A partial carbonisation temperature of 500-600℃ has been identified to result in a remarkable improvement in the toughness/handleability of the fibres in all the three cases. However, from techno-economical considerations, the neat pitch appears to provide the best precursor system for the production of pitch based carbon fibres.
        3,000원