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堇青石-铁氧体基复合节能涂层的结构与红外辐射性能

DOI: 10.7521/j.issn.0454-5648.2014.07.13

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Abstract:

以Fe2O3、MnO2、Cr2O3和堇青石粉末为原料,采用高温固相反应合成堇青石-铁氧体基红外辐射复合材料。以改良后的硅酸盐无机胶为黏结剂制备红外辐射涂料,采用涂刷工艺在普碳钢基体表面制备红外辐射节能涂层。利用热重-差热分析仪、X射线衍射仪、扫描电子显微镜及红外光谱对粉末的热稳定性、物相组成和微观结构及涂层的发射率进行分析。探讨了黏结剂的浓度、粉胶比对涂层机械性能的影响,确定了最佳的配料比及工艺制度。结果表明当硅酸盐质量分数为32%、粉胶质量比为1∶1.2时,制备的红外辐射涂层具有较好的红外辐射性能和机械性能,在6~20μm波段内,红外辐射率在0.8以上,最高可达0.94;涂层的附着力为1级,且具有良好的耐磨性、耐冲击性和抗热震性能,可在600℃的碳钢基体表面长期使用。

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