利用亚临界水热法合成了粒径为100nm～1μm、利蛇纹石相的顺磁性羟基硅酸镁微粉,采用扫描电子显微镜、X射线衍射、红外光谱和磁性检测等手段进行了表征.探讨了表面活性剂油酸、体系酸碱度、水热温度及时间、磁性掺杂与合成样品形貌、物相、结构、性能之间的关系,结果表明:油酸可有效控制微粉团聚,强碱环境下提高水热温度和延长反应时间可窄化产物粒径分布,相同水热条件下改变初始配比对产物主相无影响,掺镍可提高产物的顺磁特性,使之具有特殊的磁性润滑能力.
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