超声结合甘氨酸-硝酸盐燃烧法低温制备La_2CuO_4  

Preparation of La_2CuO_4 Composit Oxides with Ultrosound and Glycin-nitrate Combustion Method in Low Temperature

作　　者：赵伟杰[1] 张晶[1] 奚立民[1] 石雷[1] 孙丽琴[1] 

机构地区：[1]台州职业技术学院生物与化工学院,浙江台州318000

出　　处：《稀土》2015年第2期91-96,共6页Chinese Rare Earths

基　　金：台州职业技术学院重点课题项目(2014ZD09);大学生科技创新项目(2013DKC11)

摘　　要：为了提高燃烧法制备过程中前驱体的收集率和降低烧结温度,设计了一套用于燃烧法的装置,使用此装置,采用超声结合甘氨酸-硝酸盐燃烧法低温制备La2CuO4复合氧化物。通过XRD衍射,IR光谱等表征手段,考察了甘氨酸与金属离子摩尔比、超声条件对降低烧结温度的影响,研究结果表明:自制用于燃烧法的装置可使燃烧后得到的La2CuO4前驱体的收集率提升到98%;在超声功率为100W,超声时间2 h条件下,调整甘氨酸与金属离子物质的量之比为2.5∶1时,在自制燃烧装置中燃烧后得到的前驱体经550℃低温烧结即可成功制备La2CuO4复合氧化物。In order to improve precursor collection rate and lower sintering temperature in combustion synthesis process, a device for combustion method was designed. La2CuO4 composite oxides were prepared by using the self- made device with ultrasound and glycine - nitrate process. Effects of molar ratio of glyeine to metal ion and ultrasonic conditions on sintering temperature were investigated with XRD and IR. The results show that collection rate of La2CuO4 precursor can reach to 98% by using the self - made combustion device. Under the conditions of ultrasonic power 100 W, uhrosonic time 2h and molor ratio of glyeine to metal ion 2.5：1, La2CuO4 composite oxides can be prepared by sintering precursor at 550℃.

关 键 词：自制装置 超声 甘氨酸-硝酸盐燃烧法 LA2CUO4 

分 类 号：O614.331[理学—无机化学]