Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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A Study on the Utilization of Blast Furnace Slag(I) (Grain-Growth of Slag-Glass)

고노슬라그의 이용에 관한 연구(I) (슬라그유리의 결정성장)

  • Rhee, Jhun (Dept. of Ceramic Eng, Inha Univ.) ;
  • Chi, Ung-Up (Ajou Institute of Techonology) ;
  • Han, Ki-Sung (Dept. of Ceramic Eng, Inha Univ.) ;
  • Choi, Sang-Wook (Dept. of Ceramic Eng, Inha Univ.)
  • 이준 (인하대학교 공과대학 요업공학과) ;
  • 지응업 (아주공과대학) ;
  • 한기성 (인하대학교 공과대학 요업공학과) ;
  • 최상욱 (인하대학교 공과대학 요업공학과)
  • Published : 1978.03.01
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Abstract

The batch compositions and physical properties of slag-ceramics were studied with respect to their formability from the molten state and conditions of nucleation and crystal growth treatment. The selected batch compositions for nucleation and growth studies were slag, 56%; silica sand, 28%; $Na_2O＋MgO$, 8% and $TiO_2＋$chromite, 8%. The optimum nucleation condition was the temperature of 75$0^{\circ}C$ with 6 hrs. holding time and the optimum growth condition was the temperature 975$^{\circ}C$ with zero holding time. The slag-ceramics prepared under the above conditions showed the best developed microtexture. The grown crystals were identified as diopside with the average grain size of 5.7$\mu\textrm{m}$, and the amount of crystal grown were about 53% by weight. The prepared specimens of slag-ceramics showed the microhardness, 793kg/$\textrm{mm}^2$; MOR, 1,050 kg/$\textrm{cm}^2$ and thermal expansion coefficient, $85{\div}10^{-7}$cm/cm/$^{\circ}C$($25^{\circ}C$~$700^{\circ}C$).

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References

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