The sintering mechanism of nanometer powder has been studied firstly. The prepared nanosized Cr_2O_3 and MgCr_2O_4 were applied in magnesia-based castables to research effects of nanosized sol or powders on the properties of castables.

• 本文通过纳米Cr_2O_3和镁铬尖晶石溶胶-凝胶/粉体的制备方法、工艺的研究，初步探讨了纳米Cr_2O_3和镁铬尖晶石粉体的烧结。