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以单斜氧化锆(m-ZrO2)和高铝水泥为初始材料,并对其固态反应进行了研究。将不同组成的铝酸钙水泥[ZrO2中含5%~50%(摩尔分数)CaO]在1 300~1 500℃进行煅烧,研究了Ca稳定的ZrO2合成材料中结晶相的形成和致密化,通过X射线衍射分析了密度并测量了收缩。用SEM扫描电镜和X射线能量色散光谱学检测了显微结构变化。形成的主要结晶相与ZrO2-CaO-Al2O3系平衡相图预料的有关。稳定的立方晶相(c-ZrO2)由Ca0.15Zr0.85O1.85合成物组成。混合物的煅烧导致了多孔材料的形成。综合考虑原始组成和结晶相并对其结构特征进行了分析。
Monoclinic zirconia (m-ZrO2) and high-alumina cement were used as starting materials, and their solid-state reactions were studied. Calcium aluminate cement with different composition [5% ~ 50% (molar fraction) CaO] in ZrO2 was calcined at 1300 ~ 1500 ℃. The formation and densification of the crystalline phase in Ca - stabilized ZrO2 composites were investigated. The density was analyzed by X-ray diffraction and the shrinkage was measured. The microstructural changes were examined by SEM scanning electron microscopy and X-ray energy dispersive spectroscopy. The formation of the main crystalline phase and ZrO2-CaO-Al2O3 balance phase diagram is expected. The stable cubic crystalline phase (c-ZrO2) consists of a Ca0.15Zr0.85O1.85 composition. Calcination of the mixture results in the formation of a porous material. The original composition and the crystalline phase were considered synthetically and the structural characteristics were analyzed.