[1]胡子君,李俊宁,孙陈诚,等.纳米超级隔热材料及其最新研究进展[J].中国材料进展,2012,(8):025-31.[doi:10.7502/j.issn.1674-3962.2012.08.05]
HU Zijun,LI Junning,SUN Chencheng,et al.Recent Developments of Nano Superinsulating Materials[J].MATERIALS CHINA,2012,(8):025-31.[doi:10.7502/j.issn.1674-3962.2012.08.05]
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纳米超级隔热材料及其最新研究进展(
)
中国材料进展[ISSN:1674-3962/CN:61-1473/TG]
- 卷:
-
- 期数:
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2012年第8期
- 页码:
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025-31
- 栏目:
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特约研究论文
- 出版日期:
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2012-08-25
文章信息/Info
- Title:
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Recent Developments of Nano Superinsulating Materials
- 作者:
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胡子君; 李俊宁; 孙陈诚; 姚先周; 何凤梅
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(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 )
- Author(s):
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HU Zijun; LI Junning; SUN Chencheng; YAO Xianzhou; HE Fengmei
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(Aerospace Research Institute of Materials & Processing Technology, National Key Laboratory of Advanced Functional Composite Materials, Beijing 100076, China)
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- 关键词:
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纳米超级隔热材料; 热导率; 大孔体积分数; 热稳定性
- DOI:
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10.7502/j.issn.1674-3962.2012.08.05
- 文献标志码:
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A
- 摘要:
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从分析纳米隔热材料的传热机理入手,指出微米/亚微米孔隙结构特征是决定其是否具有“超级隔热”性能的关键因素。以常温常压下热导率002 W/m·K为目标,利用理论计算方法获得了纳米超级隔热材料大孔孔隙尺寸及其所占体积分数的最大容限,并采用SiO2纳米隔热材料的测试结果进行了验证。以满足1 000 ℃以上使用要求作为目标,制备了1 200 ℃下结构稳定性良好的SiO2 Al2O3复合纳米超级隔热材料,采用自行研制的超低热导率测试样机对不同温度和压力条件下的热导率进行测试,并与石英灯加热法测评试样热导率的实验结果进行了对比。最后提出了本领域存在的其它难题,展望了纳米超级隔热材料的未来发展潜力。
- Abstract:
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Nano porous superinsulation materials have ultrolow thermal conductivities, which depends on the micro/submicrometer porous structure. The macropore volume limitation is calculated and validated for silica aerogel of 002 W/m·K at 20 ℃ under atmosphere. SiO2Al2O3 nanoporous insulation materials with high thermal stability at 1 200 ℃ have been synthesized. The thermal conductivities have been tested and compared with the quartz lamp heater experiment results. The potential development of nanoporous superinsulation materials in future is also reviewed.
更新日期/Last Update:
2012-09-03