纳米Fe<sub>3</sub>O<sub>4</sub>水基磁悬液的沉淀浓度测试与型式检验性能试验

纳米Fe₃O₄水基磁悬液的沉淀浓度测试与型式检验性能试验

摘要: 利用化学方法制备了两种不同形状与大小的纳米Fe₃O₄，并制成水基磁悬液，用X射线衍射（XRD）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）等分析测试手段对其进行了表征。通过对制备的纳米Fe₃O₄水基磁悬液沉淀浓度测试以及型式检验性能试验发现该水基磁悬液静置30 min后，梨形沉淀管内几乎没有发现明显的沉淀；型式检验性能满足JB/T 6063-2006《无损检测磁粉检测用材料》标准要求。试验结果说明，现行的磁悬液沉淀浓度测定方法需要完善。

Abstract: Fe₃O₄ magnetic fluids of two different shapes of sphere and sheet were prepared by chemical method. The samples were characterized by XRD, TEM, SEM. Studies on the concentration by precipitation and type inspection performance of nano-Fe₃O₄ water-based magnetic fluid were made, and the results showed that no obviously precipitation was found in the pear shaped sedimentation tube after stabling 30min. The type inspection performance was consistent with JB/T6063-2006 Non-destructive testing-Materials for magnetic particle testing. Test result showed the current method of measuring the concentration by precipitation needed further improvement.