AZS 材料的显微结构及莫来石-ZrO_2间的固溶性问题的研究

Studies on the Microstructure of AZS Materials and the Solid Solubility between Mullite and ZrO_2

用 SEM、TEM 和 EDAX 方法,结合电熔和烧结(包括热压烧结)的 AZS 材料的显微结构,进一步探讨了莫来石-ZrO_2间的固溶性问题,复证了:“在趋于平衡的情况下,ZrO_2在莫来石中无明显固溶”的结论;并用 TEM 电子探针测定了经1500℃、8h 热处理过的电溶 AZS 材料试样中的 ZrO_2内大约含有6.50wt%的 Al_2O_3和2.72wt%的 SiO_2.

This paper has further discussed the solid solubility between mullite and ZrO_2 by em-ploying SEM,TEM and EDAX methods based on the microstructure of sintered(includinghot-pressed)and electric fused AZS materials.The result verifies that “in the case of ap-proaching equilibrium,an insignificant solid solubility of ZrO_2 exists in mullite”.By usingTEM electronic probe,the authors have also found that about 6.50wt% of Al_2O_3 and 2.72wt%of SiO_2 are contained in the sample of electric fused AZS materials heat-treated at 1500℃ for8h.