摘要
为抑制锌铁氧体在8～14μm频段的红外发射,以水热合成的ZnFeO粒子为种子,进一步在葡萄糖溶液中水热合成了高分散性的碳包覆ZnFeO复合材料.借助于TEM、红外和紫外光谱技术,证实形成了葡萄糖基碳包覆ZnFeO的核壳结构.500℃热处理后包覆层碳化程度提高,但内核仍为氧化物.而1000℃时内核发生碳热还原反应,形成了石墨层包覆Fe纳米晶的结构.8～14μm频段的发射率测试结果表明:葡萄糖基碳包覆样品在未经热处理时平均红外发射率降低至0.5以下,500℃热处理后平均红外发射率最低可至0.353,拓宽了锌铁氧体的隐身频段.
To restrain the infrared emission of zinc ferrite in 8-14μm wave band, highly dispersed carbon coated ZnFeO nanocomposites were obtained from glucose solution under hydrothermal conditions, where ZnFeO particles prepared firstly in a simple hydrothermal route was used as the seeds. It was proved to be a core-shell structure of glucose-based carbon coated ZnFeO particles by transmission electron microscope （TEM）, fourier transform infrared （FT-IR）, and UV-Vis technologies. After heat-treated at 500℃, the carbonization degree of the coating is improved, but the core is still oxide. Whereas the core takes place a carbothermal reduction at 1000℃, it finally yields a structure with a graphite layer coated Fe nanocrystals. The infrared emissivity tests in 8-14μm waveband show that it can be lowered to 0.5 by the glucose-based carbon coating without the heat treatment. After heat-treated at 500℃, it lowers the average infrared emissivity further to 0.353, which will expand the stealth band of zinc ferrite.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第5期1045-1048,共4页
Journal of Inorganic Materials
基金
航空科学基金(2007ZF52061)
国家自然科学基金(50871053)
关键词
水热合成
碳包覆
锌铁氧体
红外发射率
hydrothermal synthesis carbon coating zinc ferrite infrared emissivity
作者简介
周建华（1982-），男，博士研究生．E-mail：huajian0921@nuaa．edu．cn
通讯联系人：何建平，教授，E-mail：jianph@nuaa．edu．cn
