Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Effect of Additive Ball Clay on Physical Properties of Porous Ceramic

볼 클레이 첨가에 따른 세라믹 다공체의 물리적 특성변화

  • Received : 2013.12.14
  • Accepted : 2014.01.24
  • Published : 2014.02.28
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Abstract

A porous ceramic which has fine porosity and small specific gravity is made with Cenosphere and Ball Clay under condition of $1,250^{\circ}C$ in calcination temperature and 30 minutes of calcination time. The average size of porous ceramic was about $2.5{\times}10^{-5}$ m and pores are well developed. The void-fraction of porous ceramic was 67.1% under the input of Cenosphere and Ball clay with the weight ratio of 100 to 5. However, as weight ratio of Ball Clay increased to 20, 40, 100, the void fraction decreased to 58.4, 56.7, 47% respectively. When the weight ratio of Cenosphere and Ball Clay was 100 to 100, the apparent density of porous ceramic was $1.04g/cm^3$. which is twice the density when the weight ratio of Ball Clay was 5. On the other hand, absorption rate decreased by at least 100%. In condition of weight ratio of Cenosphere and Ball Clay was 100 to 100, compressive strength of porous ceramic was 30 (MPa), improve by about 76% or more when the weight ratio of Ball Clay was 5.

세노스피어(Cenosphere)와 볼 클레이(Ball Clay)를 이용하여 소성온도 $1,250^{\circ}C$, 소성시간 30분의 조건하에서 미세 기공을 가지며 비중이 작은 세라믹 다공체를 제조하였다. 제조된 세라믹 다공체의 평균 기공크기는 $2.5{\times}10^{-5}$ m 전후였으며, 기공이 잘 발달되었다. 세라믹 다공체의 기공율은 세노스피어 100중량비 대비 볼 클레이를 5중량비로 투입했을 때 기공율이 67.1%였다. 그러나 볼 클레이의 중량비가 20, 40, 100 증가함에 따라 기공율은 각각 58.4, 56.7, 47%로 감소하였다. 세노스피어 100중량비 대비 볼 클레이 투입량이 100중량비일 때, 세라믹 다공체의 겉보기 밀도는 $1.04g/cm^3$로 볼 클레이 5중량 값인 $0.51g/cm^3$ 대비 약 2배 증가하였으며, 반면에 흡수율은 100% 이상이 감소하였다. 세노스피어 100중량비 대비 볼 클레이 투입량이 100중량비일 때, 세라믹 다공체의 압축강도가 30 (MPa)였으며, 볼 클레이 5중량비 대비 약 76% 이상으로 향상되었다.

Keywords

References

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