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Cr2O3 对含铁辉石微晶玻璃显微结构及强度的影响

DOI: 10.14062/j.issn.0454-5648.2015.09.11

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Abstract:

以富铁白云鄂博西尾矿和粉煤灰为主要原料,采用熔融法制备含铁辉石系矿渣微晶玻璃。利用差热分析、X射线衍射仪、扫描电子显微镜和能谱仪等研究Cr2O3对含铁辉石系微晶玻璃显微结构和强度的影响。结果表明MgFe0.9Cr1.1O4尖晶石作为辉石相生长的异质成核核心,促使辉石晶体优先从尖晶石表面法线方向以枝晶方式生长。随着Cr2O3含量增加,尖晶石核心数量增多,辉石相生长方式由树枝状演化为颗粒状。添加0.25%的Cr2O3可使微晶玻璃辉石主晶相形成交错咬合的树枝晶,有效提高了微晶玻璃抗折强度,并达到218.84MPa。

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