【摘要】：以冶金硅渣為主要原料,采用水淬粉體直接燒結工藝,制備多孔微晶玻璃。利用XRD、DTA/TG、SEM以及圖像分析等技術,研究燒結工藝對多孔微晶玻璃氣孔孔徑、表觀密度、晶相組成以及抗壓強度的影響。結果表明:多孔微晶玻璃的氣孔孔徑隨燒結溫度升高以及燒結時間延長而增大,隨升溫速率的增大先增大后減小;表觀密度隨燒結時間延長逐漸增大,隨燒結溫度升高和升溫速率增大呈現出先減小后增大的趨勢;抗壓強度隨燒結溫度升高先緩慢增大后急劇降低。多孔微晶玻璃最佳燒結工藝是以30℃/min的升溫速率加熱到800℃燒結30 min,此時多孔微晶玻璃的平均孔徑為1.2 mm,表觀密度為0.81 g/cm~3,抗壓強度為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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