| 两步还原法制备MLCC电极用超细铜粉 |
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| 引用本文： | 胡敏艺,王崇国,周康根,徐锐.两步还原法制备MLCC电极用超细铜粉[J].材料科学与工艺,2009(4):539-543. |
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| 作者姓名： | 胡敏艺 王崇国 周康根 徐锐 |
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| 作者单位： | 中南大学冶金科学与工程学院; |
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| 摘 要： | 为了制备MLCC电极用超细铜粉,克服CuSO4直接水合肼还原法制备的铜粉存在粒度分布不均匀、振实密度小的问题,提出了两步液相还原新工艺,即以CuSO4溶液为原料,首先采用NaOH沉淀-葡萄糖预还原制备Cu2O,然后用水合肼还原Cu2O制备超细铜粉.针对实现铜晶体的成核与长大过程的分离,研究了水合肼加入方式对铜粉性能的影响,发现较慢的水合肼滴加速度和将水合肼还原Cu2O阶段分为升温均匀成核与水合肼连续滴加长大两个过程有利于得到粒度均匀的铜粉.在最佳试验条件下制得的铜粉呈类球形,粒度分布均匀,分散性好,平均粒径为1.8μm,振实密度达4.2g/ml.
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| 关 键 词： | MLCC 铜粉 液相还原 制备 |
Preparation of ultrafine copper powder for MLCC electrode by two-step reduction |
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| HU Min-yi,WANG Chong-guo,ZHOU Kang-gen,XU Rui.Preparation of ultrafine copper powder for MLCC electrode by two-step reduction[J].Materials Science and Technology,2009(4):539-543. |
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| Authors: | HU Min-yi WANG Chong-guo ZHOU Kang-gen XU Rui |
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| Affiliation: | HU Min-yi,WANG Chong-guo,ZHOU Kang-gen,XU Rui(School of Metallurgical Science , Engineering,Central South University,Changsha 410083,China,) |
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| Abstract: | Against the the wide size distribution and low tap density of ultrafine copper powder prepared via direct reduction of CuSO4 by hydrazine hydrate,a novel two-step-reduction process has been proposed to prepare the ultrafine copper powder used for MLCC electrode,in which Cu2O was prepared via glucose pre-reduction under alkaline conditions firstly,and then ultrafine copper powder was prepared by hydrazine hydrate reduction of Cu2O.To separate the nucleation and growth stage of copper crystal,the influence of... |
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| Keywords: | MLCC copper powder liquid phase reduction preparation |
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