Preparation and properties of strontium hexaferrite/polyurethane magnetic coatings

详细信息	查看全文 | 推荐本文 |

• 作者：X. Tang^a ; Y.M. Wang^a ; Z. Luo^a ; L.S. Wang^a ; R.Y. Hong^a ; ^b ; ^c ; ^{rhong@suda.edu.cn} ; W.G. Feng^c
• 关键词：Strontium hexaferrite ; Magnetic coatings ; Magnetic properties ; Rheology
• 刊名：Progress in Organic Coatings
• 出版年：2012
• 期刊代码：70_03009440
• 类别：ce
• 出版时间：September-October, 2012
• 卷：75
• 期：1-2
• 页码：124-130
• 文件大小：1035 K

摘要

Strontium hexaferrite nanoparticles (NPs) were prepared by co-precipitation of strontium and ferric ions in sodium hydroxide solution. The SrFe₁₂O₁₉ NPs were characterized by X-ray powder diffraction, transmission electron microscopy and vibrating sample magnetometer. SrFe₁₂O₁₉ NPs with perfect crystal structure, nanometer size, high saturation magnetization and coercivity were obtained. Afterwards, strontium hexaferrite nanoparticles were dispersed in polyester-polyurethane solution to prepare magnetic coatings (MCs) via solution blending. The magnetic and rheological properties of magnetic coatings were measured by Gouy magnetic balance and rotational rheometer, respectively. Furthermore, the mechanical, thermal properties and physical properties of magnetic films were also investigated. The results showed that magnetic films with superior mechanical properties could be obtained with the addition of 27 wt%magnetic powders.