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| Al2 O3 掺杂对SiO2 纳米透波/ 隔热材料性能的影响 | |
| 引用本文： | 吴文军,胡子君,李俊宁,杨海龙,王晓婷.Al2 O3 掺杂对SiO2 纳米透波/ 隔热材料性能的影响[J].宇航材料工艺,2014,44(1). |
| 作者姓名： | 吴文军 胡子君 李俊宁 杨海龙 王晓婷 |
| 作者单位： | 航天材料及工艺研究所,先进功能复合材料技术重点实验室 |
| 摘 要： | 在溶胶-凝胶过程中加入纳米Al2O3 颗粒制备Al2O3 掺杂的SiO2 纳米透波/ 隔热材料,研究了 Al2O3 掺杂对材料高温热稳定性、介电性能及隔热性能的影响。结果表明,Al2O3 掺杂阻碍了SiO2 颗粒之间的 烧结,提高了材料的使用温度;材料介电常数符合Lichtenecker 对数法则;室温热导率略有提高,通过组合结构 改善了材料的隔热性能。 |
Effect on the Properties of SiO2 Nanoporous Transparent-Wave/ Heat-InsulationMaterials Doped With Al2 O3 |
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| Institution: | Science and Technology on Advanced Functional Composites Laboratory, Aerospace Research Institute of Materials & Processing Technology |
| Abstract: | Al2O3 doped SiO2 nanoporous transparent-wave/ heat-insulation materials were prepared by sol-gel method. The effects of Al2O3 to the thermal stability, dielectric and insulation properties were investigated. It was showed that the thermal stability enhanced by the doping of Al2O3, which hindered the sintering of SiO2 particles. The dielectric constant fits the Lichtenecker''s equation. The influence of Al2O3 to the insulating properties was eliminated maximatily by multi-layer structure. |
| Keywords: | Al2O3 Transparent-wave/ heat-insulation materials Structure Properties |
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