添加剂对制备MLCC电极用超细铜粉形貌的影响

详细信息

Effects of Additive Agent on the Morphology of Superfine Copper Powders for MLCC Electrode

College of Metallurgical Science and Engineering, Central South University, Changsha 410083, China

摘要: 采用葡萄糖预还原,后阶段以水合肼作为还原剂,在液相中还原CuSO₄的方法制备超细铜粉。研究了聚乙烯吡咯烷酮(PVP)、NH₄Cl、NaOH对超细铜粉粒度和形貌的影响。结果表明,制得的铜粉形貌呈球形,粒径均匀可控,分散性好。加入适量的PVP有助于超细铜粉粒径均匀和形貌规范;NH₄Cl可使铜粉的粒径变小,当Cu与NH₄Cl的摩尔比为1∶1时铜粉的形貌会由类球形向正方体转变;微量的NaOH能有效消除超细铜粉表面的棱峰,使铜粉的表面更圆滑,同时也可以使铜粉粒径变小。
- 超细铜粉 /
- 添加剂 /
- 形貌
Abstract: The spheroid,uniform and well-dispersed superfine copper powder used in MLCC was prepared by using glucose and hydrazine hydrate to deoxidize CuSO₄ in acqueous solution.The effects of PVP,NH₄Cl and NaOH on copper powders are studied.The results show that an amount of PVP is beneficial to the uniformity and sphericity of copper powder and NH₄Cl has a great influence on the particle size and shape.With the amount of NH₄Cl increases,the copper particles become smaller,and when the value of n(Cu):n(NH₄Cl) is 1:1,the copper particles become cuboid from spheroid.NaOH can effectively eliminate the wrinkle of copper particles,at the same time,the copper particles become smaller,too.
- Superfine copper powders /
- Additive agent /
- Morphology

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