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研究了Mn-Cr-O和Mn-Al-O尖晶石的碳化行为,探索不同金属元素计量比对碳化行为的影响。研究表明,当Mn过量时Mn-Cr-O尖晶石可以保持尖晶石结构,但是当Cr过量时则出现Cr_2O_3第二相。Mn-Al-O尖晶石中MnO和Al_2O_3的溶解度都很小,无论Mn还是Al过量都会产生第二相氧化物。Mn-Cr-O和Mn-Al-O尖晶石在碳化气氛下都会发生明显的碳化。成分对尖晶石的抗碳化能力有明显影响,偏离化学计量比会造成抗碳化能力的降低。相对而言Mn-Al-O尖晶石具有更强的抗碳化能力。
The carbonization behavior of Mn-Cr-O and Mn-Al-O spinel was studied and the influence of different metal elements on the carbonization behavior was explored. The results show that the Mn-Cr-O spinel can maintain the spinel structure when Mn is excess, but the second phase of Cr 2 O 3 appears when Cr is excessive. Mn-Al-O spinel MnO and Al 2 O 3 solubility are very small, both Mn and Al will produce a second phase oxide. Mn-Cr-O and Mn-Al-O spinel in the carbonized atmosphere will occur under the obvious carbonation. The composition of the spinel has a significant impact on the anti-carbonization, deviations from stoichiometry will result in reduced carbon ability. Relatively speaking, Mn-Al-O spinel has more anti-carbonization ability.