Preparation of mono-dispersed mixed metal oxide micro hollow spheres by homogeneous precipitation in a micro precipitator
Preparation of mono-dispersed mixed metal oxide micro hollow spheres by homogeneous precipitation in a micro precipitator
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DOI：
10.1016/j.powtec.2005.03.004
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发表时间：
2005-06
影响因子：
5.2
通讯作者：
Jae Han Kim;W. Choi;Hee-Young Kim;Yong Kang;Yong-ki Park
中科院分区：
文献类型：
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作者：
Jae Han Kim;W. Choi;Hee-Young Kim;Yong Kang;Yong-ki Park
为了制备单分散的混合金属氧化物微空心球，在配置有微毛细管尖端和毫米级玻璃管的微沉淀器中使用混合金属硫酸盐前体溶液和IPA（异丙醇）溶剂进行均匀沉淀。所制备的微米粒子显示出具有窄尺寸分布的空心球的形态。为了制备均匀的无团聚的微空心颗粒，微沉淀器必须在低雷诺数的层流区操作。可以简单地通过改变毛细管尖端直径和/或前体溶液和IPA溶剂的线速度来控制颗粒的尺寸。此外，空心球的壳厚度可以仅通过前体溶液的浓度来控制。在插入多毛细管的微沉淀器中验证了微流控装置对微空心球的批量生产。
For the preparation of mono-dispersed mixed metal oxide micro hollow spheres, homogeneous precipitation was carried out using a mixed metal sulfate precursor solution and an IPA (isopropyl alcohol) solvent in a micro precipitator configured with a micro capillary tip and a millimeter scale glass tube. The prepared micro particles revealed the morphology of hollow spheres with a narrow size distribution. For the preparation of uniform micro hollow particles without agglomeration the micro precipitator had to be operated in a laminar flow region with a low Reynolds number. The size of the particle could be controlled simply by changing the capillary tip diameter and/or the line velocity of the precursor solution and the IPA solvent. Also, the shell thickness of the hollow spheres could be controlled just by the concentration of the precursor solution. The mass production of micro hollow spheres by the micro fluidic device was validated in a micro precipitator inserted with multi-capillary tubes.