(東北大學(xué) 材料與冶金學(xué)院，沈陽 110004)
摘 要: 以鐵尾礦、硼泥和粉煤灰制備礦渣微晶玻璃，利用X射線衍射儀、掃描電鏡和穆斯堡爾譜對(duì)微晶玻璃的微觀結(jié)構(gòu)進(jìn)行研究。結(jié)果表明：礦渣微晶玻璃的主析晶相為鈣鐵輝石，次晶相為普通輝石和紫蘇輝石；隨著硼泥配入量的增加，礦渣微晶玻璃中晶體的析出量和尺寸均逐漸增加，晶體形態(tài)由枝晶向球晶及塊狀晶體過渡；枝晶向球晶轉(zhuǎn)變可以明顯改善礦渣微晶玻璃的性能，而球晶向塊狀晶體的轉(zhuǎn)變則惡化了微晶玻璃的性能。在本實(shí)驗(yàn)研究的條件下，Fe2+主要分布在析晶相中，起到促進(jìn)晶體析出的作用；隨著硼泥配入量的增加，Fe3+含量也逐漸增加，Fe2+和Fe3+共同促進(jìn)了熔體內(nèi)部的晶體析出。
關(guān)鍵字: 微晶玻璃；鐵尾礦；微觀組織；穆斯堡爾譜
glass ceramic of ferrous tailings and slag
（School of Materials and Metallurgy, Northeastern University,Shenyang 110004, China）
Abstract:The slag glass-ceramic was prepared from ferrous tailing, boron mud and fly ash. The microstructure of glass-ceramic was investigated by X-ray diffractometry, scanning electron microscope and Mössbauer spectrum. The results show that, Main crystallization phase of glass ceramic was hedenbergite, and the minor crystallization phases were augite and hypersthene. With increasing boron mud addition, the amount and the size of crystallization phases both gradually increased, the configure of crystallization phases transformed from the branch, the ball, to the block. The transformation from the branch to the ball could improve the properties of glass ceramic, and the transformation from the ball to the block could worsen the properties of glass ceramic. On the experimental condition, most of Fe2+ was distributed in crystal phase, which promoted the crystal precipitation. As increasing of boron mud, the concentration of Fe3+ was increased. Fe2+ and Fe3+ promoted the crystal precipitation together.
Key words: glass-ceramic; ferrous tailing; microstructure; Mössbauer spectrum
