利用OM、SEM、EDAX和XRD检测方法研究了一种在隧道窑烧成带使用10年的再结合镁铬砖显微结构均化现象.原砖由电熔镁铬颗粒和铬矿颗粒组成,其显微结构是不均匀的.经过1600～1750℃长时间的相互作用,全部铬矿颗粒溶于方镁石基晶中,显微结构转变为均匀的"两相共生体"结构--含尖晶石脱溶相的方镁石固溶体.原砖中的氧化铬经蒸发而损失.
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