中南大学学报（自然科学版）2011，Vol.42Issue(9)：2600-2605,6.
共沉淀法和聚丙烯酰胺凝胶法制备锆掺杂改性Bi2O3的比较研究
Comparative study of Bi2O3 doped ZrO2 prepared by coprecipitation and polyacrylamide gel process
摘要
Abstract
ZrO2-doped Bi2O3 powders Bi2-xZTxOi^^2(x=O-\.0) were prepared by coprecipitation and polyacrylamide gel method using Bi(NO3)3-5H2O and Zr(NO3)4-5H2O as materials. The products were characterized using XRD, FTIR and SEM. The results show that after calcined at 650 °C, for the pure Bi2O3, in the process of coprecipitation with reverse dropping method (adding precipitant to a solution of Bi3+), and using ethylene glycol-water system as the dissolvent, pure a-Bi2O3 powder is obtained. But using water as the dissolvent, a-Bi2O3 powder is impurities. And in the process of polyacrylamide gel, pure a-Bi2O3 powder is obtained too. When Bi2O3 is doped with ZrO2 at jc=0.2, the process of coprecipitation with reverse dropping method can precipitate Bi and Zr ions simultaneously and form a cubic <5-Bi2O3 phase solid solution with the general formula of Bi, 8Zr02O31. The process of coprecipitation with natural dropping method results in the phase separation, and the tetragonal Bi7.3gZro.62O12.31 solid solution is observed. However, the samples prepared by polyacrylamide gel method show no cubic <5-Bi2O3 phase, but only a mixture of a-Bi2O3) the tetragonal Bi73gZro.62O12.31 and the cubic ZrO2. Consequently, the highly conducting phase <5-Bi2O3 can be obtained at 650 ℃ by solid solution formation of Bi2O3 with ZrO2, using reverse dropping coprecipitation method.关键词
Bi2O3/ZrO2/Bi2-xZrxO3x/2/共沉淀法/聚丙烯酰胺凝胶法Key words
Bi2O3/ ZrO2/ Bi2_tZrO3+x/2/ coprecipitation/ polyacrylamide gel分类
化学化工引用本文复制引用
张昭,樊国栋,郑彦春..共沉淀法和聚丙烯酰胺凝胶法制备锆掺杂改性Bi2O3的比较研究[J].中南大学学报（自然科学版）,2011,42(9):2600-2605,6.基金项目
陕西省科技攻关项目(2008K07-32) （2008K07-32）
陕西省教育厅专项科研计划项目(08JK228) （08JK228）
