OALib Journal期刊
ISSN: 2333-9721
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NiFe2O4红外高辐射涂层的制备及其热物理性能
DOI: 10.7521/j.issn.0454-5648.2014.06.20
Abstract:
采用固相法制备具有反式尖晶石结构的NiFe2O4粉体,将该粉体与硅酸钠水溶液混合制备了高辐射涂层。研究了NiFe2O4粉体的晶相结构、合成过程以及基料粉体的预处理温度、粉体粒径及涂层厚度等因素对NiFe2O4涂层辐射率的影响。结果表明以Fe2O3和Ni2O3为原料,经过1200℃高温固相反应可以制得具有高辐射率的反式尖晶石NiFe2O4粉体。制得的涂层辐射率随着NiFe2O4粉体粒径的减小而增加;随着涂层厚度的增加,辐射率呈现出先迅速增大至某一峰值然后缓慢下降,最后趋于某一固定值的变化规律。涂层厚度为0.08mm时红外辐射率最高为0.90。涂层的耐温性能良好。
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