Al_2O_3掺杂对SiO_2纳米透波/隔热材料性能的影响  

Effect on the Properties of SiO_2 Nanoporous Transparent-Wave/Heat-Insulation Materials Doped With Al_2O_3

作　　者：吴文军[1] 胡子君[1] 李俊宁[1] 杨海龙[1] 王晓婷[1] 

机构地区：[1]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,北京100076

出　　处：《宇航材料工艺》2014年第1期97-100,共4页Aerospace Materials & Technology

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。Al2O3 doped SiO2 nanoporous transparent-wave/heat-insulation materials were prepared by sol-gel method. The effects ofAl2O3 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 Liehteneeker＇s equation. The influence of Al2O3 to the insulating properties was eliminated maximatily by multi-layer structure.

关 键 词：AL2O3 透波 隔热材料 结构 性能 

分 类 号：TU551.3[建筑科学—建筑技术科学]