摘要
通过实验比较制备纳米CeO2粉的HCl和HNO3溶解法.结果表明:用HCl溶解法溶解比例不超过25%,而且原料消耗大,产生氯气等有害气体对环境污染严重,不适合批量生产;用HNO3溶解法,当温度为35～50℃,:VHNO3=0.125,反应时间60min时,溶解比例大于90%,并且节省原料,无污HNO3浓度为7.0～8.5mol/L,VH2O2染,得到的纳米粉颗粒均匀(粒径为30～40nm),可用于工业化生产.
The dissolving processes with HCl and HNO3 were compared experimentally. The proportion of dissolved CeO2 with HCl was less than 25% accompanied with large consumption in raw materials and serious pollution by Cl2, unsuitable for production. On the other hand, the proportion of CeO2 dissolved with HNO3 was over 90% in the following reaction conditions: temperature 35°C to 50°C, concentration of HNO3: 7.0 to 8.5 mol/L, VH2O2: VHNO3=0.125, dissolving time: 60 min. The resolved nano-powders were homogeneous and their grain sizes were in the range of 30 to 40 nm. HNO3 dissolving process saves raw materials and there is no pollution, showing industrialized production.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2004年第5期696-698,共3页
Journal of Southwest Jiaotong University
关键词
稀土
纳米材料
CEO2
溶解工艺
rare earth
nanomaterials
CeO_2
dissolving process
