[1]胡子君,李俊寧,孫陳誠,等.納米超級隔熱材料及其最新研究進(jìn)展[J].中國材料進(jìn)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]
點(diǎn)擊復(fù)制
納米超級隔熱材料及其最新研究進(jìn)展(
)
中國材料進(jìn)展[ISSN:1674-3962/CN:61-1473/TG]
- 卷:
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- 期數(shù):
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2012年第8期
- 頁碼:
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025-31
- 欄目:
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特約研究論文
- 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; 李俊寧; 孫陳誠; 姚先周; 何鳳梅
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(航天材料及工藝研究所 先進(jìn)功能復(fù)合材料技術(shù)重點(diǎn)實(shí)驗(yàn)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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- 關(guān)鍵詞:
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納米超級隔熱材料; 熱導(dǎo)率; 大孔體積分?jǐn)?shù); 熱穩(wěn)定性
- DOI:
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10.7502/j.issn.1674-3962.2012.08.05
- 文獻(xiàn)標(biāo)志碼:
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A
- 摘要:
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從分析納米隔熱材料的傳熱機(jī)理入手,指出微米/亞微米孔隙結(jié)構(gòu)特征是決定其是否具有“超級隔熱”性能的關(guān)鍵因素。以常溫常壓下熱導(dǎo)率002 W/m·K為目標(biāo),利用理論計(jì)算方法獲得了納米超級隔熱材料大孔孔隙尺寸及其所占體積分?jǐn)?shù)的最大容限,并采用SiO2納米隔熱材料的測試結(jié)果進(jìn)行了驗(yàn)證。以滿足1 000 ℃以上使用要求作為目標(biāo),制備了1 200 ℃下結(jié)構(gòu)穩(wěn)定性良好的SiO2 Al2O3復(fù)合納米超級隔熱材料,采用自行研制的超低熱導(dǎo)率測試樣機(jī)對不同溫度和壓力條件下的熱導(dǎo)率進(jìn)行測試,并與石英燈加熱法測評試樣熱導(dǎo)率的實(shí)驗(yàn)結(jié)果進(jìn)行了對比。最后提出了本領(lǐng)域存在的其它難題,展望了納米超級隔熱材料的未來發(fā)展?jié)摿Α?/span>
- 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