• 제목/요약/키워드: Low cement castable

검색결과 4건 처리시간 0.021초

산화물 및 비산화물 Microfiller의 첨가가 저시멘트 알루미나 캐스타블의 특성에 미치는 영향 (Influence of Various Oxide and Nonoxide Microfillers on the Thermomechanical Properties of Alumina Based Low-Cement-Castables)

  • 이승재;이상원
    • 한국세라믹학회지
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    • 제32권9호
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    • pp.977-988
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    • 1995
  • Several oxide (ZrO2, Al2TiO5, reactive Al2O3) and nonoxide (SiC, Si3N4, "ALON" (5AlN.9Al2O3)) additives were used as a microfiller for alumina based LCC (Low-Cement-Castable). High temperature prooperties (HMOR, softening under load) and the phase changes of developed LCC on various sintering temperatures were examined. In addition, thermal shock test and corrosion test were accomplished. Based on these data the effects of each microfiller on the properties of LCC were established comparing to those of the commercial LCC with amorphous silica as a microfiller. The castables, containing reactive alumina, ZrO2 and "ALON" (5AlN.9Al2O3) as a first portion, exhibited considerably higher HMOR-values over 100$0^{\circ}C$, better creep behavior, and thermal shock resistance than those of castables with amorphous silica. The LCC with 5% Al2TiO5 showed no corrosion against molten aluminum.nst molten aluminum.

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턴디쉬용 마그네시아질 댐블록의 제조와 그특성 (characteristics of Magnesia Dam Block for Tundish Vessel in Steel Making Process)

  • 정두화;김상모;이석근
    • 한국세라믹학회지
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    • 제36권8호
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    • pp.876-885
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    • 1999
  • In order to develop high performance basic dam block for tundish vessel in steel-making binders and additives on hydration and thermal characteristics of magnesiz castable refractories were studied. Crack initiation and propagation in cement bonded magnesia castables due to slaking of magnesia clinker at drying process were suppressed by using spinel clinker instead of magnesia powder. In case of Na2O$.$2CaO$.$P2O5(NC2P) bonded castable crack initiation due to slaking of magnesia clinker did not occur but bending strength at high temperature was low. Mechanical properties of NC2P bonded castable refractories at high temperature were improved by using magnesia clinker that contains low SiO2 contents.

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