EDTA络合法制取稳定ZrO_2纳米粉  

Preparation of Full Stablized ZrO_2 from EDTA Complex

作　　者：陶颖[1] 王零森 陈振华[1] 

机构地区：[1]中南工业大学非平衡材料与科学研究所 [2]粉末冶金研究所,湖南长沙410083

出　　处：《功能材料》2000年第4期393-395,共3页Journal of Functional Materials

摘　　要：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 the artical, nanocrystalline of ZrO2, powders were prepared from complex precursors by the reaction of inorganic salt and EDTA. At first, the complex gel, which structures had relations with the mol ratios of Zr or Y to EDTA and pH value of reactive solution, could be attained. Through a serial experiments,especially, the system of drying and calcining was strictly controled. By means of TG. DTA, XRD, BET, TEM and so on to analyse the sol or gel, then conclusions could be drawn; the last calcining temperature was 600℃. When pH value was 5, the ratio was 2, 600℃ calcining, attained ZrO2 powder had its surface area of 107. 30m2 /g, the diameter was about 9. 5nm. So the nanocrystalline ZrO2 powder which had good structure and character could be made by the method of EDTA complex.

关 键 词：化学络合法 氧化锆陶瓷 纳米粉 

分 类 号：TQ174.758[化学工程—陶瓷工业]