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.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2014年第1期97-100,共4页
Aerospace Materials & Technology
关键词
AL2O3
透波
隔热材料
结构
性能
Al2O3, Transparent-wave/heat-insulation materials, Structure, Properties
作者简介
吴文军，1981年出生，工程师，主要从事高效隔热材料研究。E-mail：evanwu@163．com
