Liu Wenyan? Wei Yuan,Yu Zhengpeng,Chen Huanhuan,et al.Effect of cobalt sulfate concentration on structure and magnetic performance of Co-W-P thin film[J].Plating & Finishing,2023,(10):15-20.[doi:10.3969/j.issn.1001-3849.2023.10.003]
硫酸钴浓度对电沉积 Co-W-P 薄膜结构与磁性能的影响
- Title:
- Effect of cobalt sulfate concentration on structure and magnetic performance of Co-W-P thin film
- Keywords:
- Co-W-P thin film ; electrodeposition ; concentration of cobalt sulfate ; structure ; magnetic performance
- 分类号:
- TQ153
- 文献标志码:
- A
- 摘要:
- 在 20 # 钢基体上电沉积 Co-W-P 薄膜，并研究镀液中硫酸钴浓度对 Co-W-P 薄膜的结合强度、结构、成分、厚度和磁性能的影响。结果表明： Co-W-P 薄膜与 20 # 钢基体结合紧密，随着硫酸钴浓度从 5 g/L 增至 25 g/L ， Co-W-P 薄膜的结构和物相无明显变化，但平均晶粒尺寸呈现先减小后增大的趋势， Co 元素的质量分数呈现先升高后降低的趋势，导致不同 Co-W-P 薄膜的致密性和磁性能存在差异。当硫酸钴浓度为 15 g/L 时， Co-W-P 薄膜的平均晶粒尺寸仅为 40.6 nm ， Co 元素的质量分数达到 64.19 % ，具有最大的矫顽力（ 932 A/m ）和饱和磁化强度（ 100.7 A·m 2 ·kg -1 ），其结构致密并且展现出良好的磁性能。在一定范围内硫酸钴浓度的增加，降低了成核过电位，使晶粒细化且结合紧密，同时提高了钴还原沉积效率，使 Co 元素的质量分数升高。研究表明：晶粒细化、致密性改善以及磁性元素的协同作用进一步提高了 Co-W-P 薄膜的磁性能。
- Abstract:
- ： Co-W-P thin film was electrodeposited on 20 # steel substrate ， and the effect of cobalt sulfate concentration in the plating solution on the bonding strength ， structure ， composition ， thickness and magnetic performance of Co-W-P thin film was investigated. The results showed that Co-W-P thin film was closely combined with the 20 # steel substrate. With the increase of cobalt sulfate concentration from 5 g/L to 25 g/L ， the structure and phase of Co-W-P thin film did not change significantly ， but the average grain size decreased first and then increased ， and the mass fraction of Co element increased first and then decreased ， resulting in differences in the compactness and magnetic performance of different Co-W-P thin films. When the cobalt sulfate concentration was 15 g/L ， the average grain size of the Co-W-P film was only 40.6 nm ， of which the mass fraction of Co element reached 64.19 % ， and the maximum coercivity and saturation magnetization were 932 A/m and 100.7 A?2?g-1?espectively ， indicating that the Co-W-P thin film had a dense structure and exhibited good magnetic performance. With the increase of cobalt sulfate concentration in a certain range ， the nucleation overpotential was reduced ， and the grains were refined and tightly bonded. Meanwhile ， the reduction deposition efficiency of cobalt was increased ， and the mass fraction of Co element was also increased. The results showed that the magnetic properties of Co-W-P thin films were further improved by grain refinement ， compactness improvement and the synergistic effect of magnetic elements.
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备注/Memo
收稿日期： 2022-10-25 修回日期： 2022-11-23 作者简介： 刘文彦（ 1981 —），男，硕士研究生，副教授，主要研究方向为应用化学、功能薄膜等。 email ： wenyan_liu000@163.com 基金项目： 湖北省教育厅基金项目（ 2019JB323 ）?/html>