液相沉淀法制备草酸钪粉末及其形貌控制
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摘要
采用液相沉淀法,通过改变氯化钪溶液中加入草酸钠溶液时沉淀结晶的条件,实现了草酸钪晶体形貌的控制。初步探究了溶液pH值、加料方式、钪浓度、表面活性剂、陈化时间等条件对草酸钪形貌的影响及其机理。结果表明,控制不同的实验条件可以制备六边形薄片状与厚片状、球形、双棱锥形、层状堆积等多种草酸钪晶体,对含钪粉末材料的研究与应用具有一定的推动作用。
The morphology of scandium oxalate crystal was controlled by changing the conditions of precipitation and crystallization when adding sodium oxalate to scandium chloride solution by liquid precipitation method.The effects of solution pH,feeding method,scandium concentration,surfactant and aging time on the morphology of scandium oxalate and its mechanism were investigated.The results show that many kinds of scandium oxalate crystals,such as hexagonal sheet and thick sheet,spherical,bipyramidal and layered stacking,can be prepared by controlling different experimental conditions,which can promote the research and application of scandium-containing powder materials.
The morphology of scandium oxalate crystal was controlled by changing the conditions of precipitation and crystallization when adding sodium oxalate to scandium chloride solution by liquid precipitation method.The effects of solution pH,feeding method,scandium concentration,surfactant and aging time on the morphology of scandium oxalate and its mechanism were investigated.The results show that many kinds of scandium oxalate crystals,such as hexagonal sheet and thick sheet,spherical,bipyramidal and layered stacking,can be prepared by controlling different experimental conditions,which can promote the research and application of scandium-containing powder materials.
引文
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[3] 刘彩云,符剑刚.钨渣中钪的萃取回收实验研究[J].稀有金属与硬质合金,2015,43(05):4-8,11.
[4] 李青刚,李兆洋,孙盼,等.离子交换法净化氯化钪溶液[J].东北大学学报(自然科学版),2016,37(10):1 410-1 414.
[5] 刘宇晖,欧阳宇平,吴希桃,等.从钛渣氯化废盐中提取氧化钪的方法:CN104498723A[P].2015-04-08.
[6] 贾志谦,刘忠洲.液相沉淀法制备纳米粒子的过程特征和原理[J].化学工程,2002,30(1):38-41.
[7] 黄凯,郭学益,张多默.超细粉末湿法制备过程中粒子粒度和形貌控制的基础理论[J].粉末冶金材料科学与工程,2005,10(6):319-324.
[8] YU J,HUA T,BEI C.Morphological control of strontium oxalate particles by PSMA-mediated precipitation reaction[J].Materials Chemistry & Physics,2005,91(1):134-139.
[9] 张军,孙聆东,廖春生,等.氧化锌微晶的制备和形貌控制[J].无机化学学报,2002,18(1):72-74.
[10] 徐光宪.稀土(上册)[M].北京:冶金工业出版社,1995.
[11] CHO S B,NOH J S,PARK S J,et al.Morphological control of Fe3O4,particles via glycothermal process[J].Journal of Materials Science,2007,42(13):4 877-4 886.
[12] ADAIR J H,SUVACI E.Morphological control of particles[J].Current Opinion in Colloid & Interface Science,2000,5(1):160-167.
[13] 刘志宏.镍钴草酸盐制备中的形貌与粒度控制[D].长沙:中南大学,2007.
[14] WU W,NANCOLLAS G H.Interfacial free energies and crystallization in aqueous media[J].Journal of Colloid & Interface Science,1996,182(2):365-373.
[15] 宋昭峥.表面活性剂科学与应用[M].北京:中国石化出版社,2015.
[16] 赵国玺,朱步瑶.表面活性剂作用原理[J].日用化学工业信息,2003(17):16-16.
[17] AKTAA Z,WOODBURN E T.Effect of addition of surface active agent on the viscosity of a high concentration slurry of a low-rank British coal in water[J].Fuel Processing Technology,2000,62(1):1-15.
[18] BALDAN A.Review progress in Ostwald ripening theories and their applications to nickel-base superalloys Part I: Ostwald ripening theories[J].Journal of Materials Science,2002,37(11):2 171-2 202.
[19] 彭美勋,沈湘黔,危亚辉.球形Ni(OH)2生长过程中的Ostwald熟化作用[J].电源技术,2008,32(2):106-108.