稀土La对化学共沉淀法制备纳米SnO2结构的影响

材料导报, 2006, 20(z1): 161-163.

稀土La对化学共沉淀法制备纳米SnO2结构的影响

杨敏鸽 ^1, , 王俊勃 ^2, , 张燕 ^3, , 丁秉钧 ^4,

1.西安工程科技学院,西安,710048

2.西安工程科技学院,西安,710048;西安交通大学金属材料强度国家重点实验室,西安,710049

3.西安工程科技学院,西安,710048

4.西安交通大学金属材料强度国家重点实验室,西安,710049

基金项目: 国家自然科学基金(50471033) 陕西省自然科学基金(2004E112) 陕西省教育厅资助项目(05JK209)

关键词：纳米SnO2 , La , Sn(OH)4 , 化学共沉淀

Effect of La-doped on Structure of Nanosized SnO2 by Chemical Co-precipitation Method

以SnCl4和LaCl3为原料,采用化学共沉淀法制备混杂La的纳米SnO2,运用DSC-TG、XRD和TEM等对混杂La的SnO2纳米粉末的物相和粒度进行了分析.结果发现:(1)采用化学共沉淀法制备混杂La的SnO2粉末,焙烧温度在400～650℃时,主要成分为SnO2,750℃以上焙烧,主要成分为La2Sn2O7和SnO2.(2)La混杂是通过阻碍SnO2由非晶体向晶体转变来抑制纳米颗粒长大,一旦晶体形成,并达到一个临界尺寸值时,La元素便开始脱溶析出,并反应生成La2Sn2O7,其对纳米晶粒长大的阻碍作用消失,晶粒将迅速长大.

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材料期刊网

稀土La对化学共沉淀法制备纳米SnO2结构的影响

Effect of La-doped on Structure of Nanosized SnO2 by Chemical Co-precipitation Method

参考文献