Abstract
This study aimed at offering basic data to develop a new use of sawdust and rice husk. Research investigated the variation of density, weight loss and dimensional decreasing rate by the percentage of resin impregnation and carbonization temperature of ceramics, which were formed by the percentage of resin impregnation of 40~80% and carbonization of $600{\sim}1200^{\circ}C$ with board impregnated with phenolic resin made from sawdust and rice husk. The results of this study were as follows:1) As the percentage of resin impregnation increased, the thickness shrinkage and weight loss were decreased; on the other hand, density and modulus of rupture increased. Meanwhile, the carbonization temperature at $1200^{\circ}C$ showed the highest values, as the density was $0.81g/cm^3$ and the bending strength was $77.9kgf/cm^2$ in the percentage of resin impregnation at 70%. 2) As the carbonization temperature grew higher the linear shrinkage, thickness shrinkage and weight loss increased while the density increased until the carbonization temperature of $1000^{\circ}C$; but then decreased slightly at $1200^{\circ}C$.
톱밥과 왕겨를 혼합하여 보드를 제조한 후 페놀수지에 함침율 40~70%로 함침한 후 소성온도 $600{\sim}1200^{\circ}C$에서 소성하여 혼합세라믹을 제조한 다음 수지함침율과 소성온도에 따른 혼합세라믹의 밀도변화, 중량 및 치수감소율과 휨강도를 조사하였다. 수지함침율이 증가함에 따라 소성 후 두께 및 중량 감소율은 감소하였고 밀도와 휨강도는 증가하였다. 소성온도가 증가함에 따라 소성 후 길이, 두께 및 중량 감소율은 증가하였고 밀도는 소성온도 $800^{\circ}C$까지는 증가하다가 $1200^{\circ}C$ 에서는 약간 감소하였다.
