【摘要】 采用ＥＤＴＡ（乙二胺四乙酸）溶胶凝胶法制备了ＺｒＯ２８％Ｙ２Ｏ３（摩尔分数）纳米粉末．研究了乙二醇对粉末平均粒径和团聚体强度的影响机理．结果表明：在溶液中加入乙二醇，可取代氢键而参与ＥＤＴＡ络合物分子之间的聚合反应，改善了凝胶稳定性，从而制得均匀透明的凝胶，并在一定程度上减少了硬团聚；先后经４００℃，２ｈ及７００℃，２ｈ煅烧，粉末比表面积为３５ｍ２／ｇ，平均粒径约２８ｎｍ，颗粒尺寸分布范围极窄，中位径ｄ５０仅为０．４４μｍ，且大多为软团聚．更多还原

【Abstract】 Nanometer ZrO 2 8% Y 2O 3 (molar fraction) powders were prepared by the EDTA(ethylenediaminetetraacetic acid) sol gel method, and the effects of ethylene glycol on the average particle size and strength of agglomerates were studied. The results show that because of replacement of hydrogen bonds with ethylene glycol in the polymerized complexes, gel stabilization and homogeneity were improved, and the amount of hard agglomerates was decreased to some extent. The powders, calcined at 400 ℃ for 2 h and 700 ℃ for 2 h, had a specific surface area of 35 m 2/g and average particle size of 28 nm with very sharp distribution and median particle size of 0.44 μm, mostly being soft agglomerates.更多还原