| 共沉淀法合成Zn掺杂Co2-Y平面六角铁氧体粉的热力学分析 |
| Thermodynamic Analysis on Preparation of Zinc Doped Co2-Y Planar Hexagonal Ferrite Powder by Chemical Co-precipitation Method |
|
| 摘要: 通过对Me(Ba2+，Zn2+，Co2+，Fe3+)-CO32--NH3-H2O体系进行热力学分析，得到不同的总碳浓度(cC)和总氮浓度(cN)时各金属离子总浓度(cMe)与pH值关系，由此确定4种金属离子共沉淀完全的pH值范围。热力学分析表明：以Na2CO3和NH3·H2O作沉淀剂，用共沉淀法合成Zn掺杂Co2-Y平面六角铁氧体粉时，体系pH值由Ba2+和Zn2+沉淀完全的酸度条件决定，而两者取决于cC和cN的相对关系；当cC>1.000 mol·L-1、cN<0.100 mol·L-1时，控制pH值在8～12范围内，即可确保共沉淀完全。 |
| 关键词: Y型平面六角铁氧体 化学共沉淀 热力学分析 |
| 基金项目: |
| Abstract: The pH-dependence of cMe under various total carbon concentration cC and total nitrogen concentration cN in the Me-CO32--NH3-H2O system were presented by thermodynamic analysis, and the co-precipitation window of Ba2+, Zn2+, Co2+ and Fe3+ was obtained at a suitable pH value. The results show that the co-precipitation window to prepare zinc doped Co2-Y planar hexagonal ferrite powder is mainly controlled by the pH value for completely precipitation of Ba2+ and Zn2+ in co-precipitation process, and the precipitants are Na2CO3 and NH3·H2O, while the field of co-precipitation of Ba2+ and Zn2+ is determined by the reciprocal ship of cC and cN. In this system, when cC value is greater than 1.000 mol·L-1, and cN value is smaller than 0.100 mol·L-1, the four kinds of metal ions can be completely co-precipitated in pH value range from 8 to 12. |
| Keywords: Y type planar hexagonal ferrite chemical co-precipitation thermodynamic analysis |
| |
| 摘要点击次数: 1333 |
| 全文下载次数: 2251 |
| 蔡进红,代建清,周小兵.共沉淀法合成Zn掺杂Co2-Y平面六角铁氧体粉的热力学分析[J].无机化学学报,2008,24(12):1943-1948. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
