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本文以ＥＤＴＡ为络合剂，使它与无机锆、钇盐络合，生成络合物溶胶。这种化学络合法制得的溶胶结构随着锆、钇离子与 ＥＤＴＡ的摩尔配比 （ｒ）及其溶液所处介质溶液的 ｐＨ值而变化。借助于ＴＧ、ＤＴＡ、ＸＲＤ、ＢＥＴ、ＴＥＭ等方法分析；可得出最后煅烧温度为６００℃。在实验范围内，ｐＨ值恒定时，ｒ大于２时，粒径随ｒ增大而增加；当 ｒ＜２时，粒径随ｒ增加而减小，在同一配比下小ｐＨ＞５时，ＳＢＥＴ、随ｐＨ值的升高迅速下降；ｐＮ值在３～５范围内，粉末粒径变化不很明显，ＰＨ＜３时，粉末粒径随ｐＨ值降低迅速增加。ｐＨ＝５、ｒ＝２、６００℃煅烧后得到的ＺｒＯ２粉末比表面积为 １０７．３０ｍ２／ｇ，粒径约为９．５ｎｍ。因此用 ＥＤＴＡ络合法可制得晶化完全、固溶好的ＺｒＯ２纳米粉。
In this paper, EDTA as a complexing agent, make it with inorganic zirconium, yttrium salt complexation, complex sol formed. The chemical structure of the sol sol structure obtained with zirconium, yttrium ions and EDTA molar ratio (r) and the solution in which the pH of the media solution changes. By means of TG, DTA, XRD, BET, TEM and other methods analysis; can be drawn to the final calcination temperature of 600 ℃. In the experimental range, when r is more than 2, the particle size increases with increasing r when the pH is constant. When r <2, the particle size decreases with r increasing. When the pH is lower than 5 in the same ratio, SBET decreased rapidly with the increase of pH value. When the value of pN was in the range of 3 ~ 5, the change of powder particle size was not obvious. When PH value was less than 3, the particle size of powder decreased rapidly with the decrease of pH value. The specific surface area of ZrO2 powder obtained after calcination at pH = 5 and r = 2,600 ℃ is 107.30m2 / g and the particle size is about 9.5nm. Therefore, EDTA complexation method can be prepared completely crystallized, ZrO2 nano powder good solid solution.