冶金硅渣烧结多孔微晶玻璃的结构及性能

发布时间：2018-10-05 10:22

【摘要】：以冶金硅渣为主要原料,采用水淬粉体直接烧结工艺,制备多孔微晶玻璃。利用XRD、DTA/TG、SEM以及图像分析等技术,研究烧结工艺对多孔微晶玻璃气孔孔径、表观密度、晶相组成以及抗压强度的影响。结果表明:多孔微晶玻璃的气孔孔径随烧结温度升高以及烧结时间延长而增大,随升温速率的增大先增大后减小;表观密度随烧结时间延长逐渐增大,随烧结温度升高和升温速率增大呈现出先减小后增大的趋势;抗压强度随烧结温度升高先缓慢增大后急剧降低。多孔微晶玻璃最佳烧结工艺是以30℃/min的升温速率加热到800℃烧结30 min,此时多孔微晶玻璃的平均孔径为1.2 mm,表观密度为0.81 g/cm~3,抗压强度为4.6 MPa。
[Abstract]:Porous glass-ceramics were prepared from metallurgical silicon slag by direct sintering of water quenched powder. The effects of sintering process on pore size apparent density crystal phase composition and compressive strength of porous glass-ceramics were studied by means of XRD,DTA/TG,SEM and image analysis. The results show that the pore diameter of porous glass-ceramics increases with the increase of sintering temperature and sintering time, increases first and then decreases with the increase of heating rate, and the apparent density increases gradually with the increase of sintering time. With the increase of sintering temperature and heating rate, the compressive strength decreases first and then increases, and the compressive strength increases slowly at first and then decreases sharply with the increase of sintering temperature. The optimum sintering process of porous glass-ceramics is heated to 800 鈩，

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