SiO2@TiO2核壳结构及其在高温下的隔热性能表征

doi:10.3724/SP.J.1077.2012.11691

无机材料学报 ›› 2012, Vol. 27 ›› Issue (4): 445-448.DOI: 10.3724/SP.J.1077.2012.11691 CSTR: 32189.14.SP.J.1077.2012.11691

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SiO₂@TiO₂核壳结构及其在高温下的隔热性能表征

肖世玉, 张跃

(北京航空航天大学材料科学与工程学院, 北京 100191)

收稿日期:2011-11-04 出版日期:2012-04-10 网络出版日期:2012-03-12
作者简介:肖世玉. E-mail: xiaoshiyu@mse.buaa.edu.cn

A Novel Thermal Insulation Coating with SiO₂@TiO₂ Core-shell Particles and Its In-situ Characterization at High Temperature

XIAO Shi-Yu, ZHANG Yue

(School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China)

Received:2011-11-04 Published:2012-04-10 Online:2012-03-12
About author:XIAO Shi-Yu(1987-), female, candidate of master. E-mail: xiaoshiyu@mse.buaa.edu.cn

摘要/Abstract

摘要：

以SiO₂@TiO₂核壳结构粒子为新型功能填料, 采用旋涂方法制得了高温隔热涂层. TEM照片显示通过溶胶-凝胶法, 成功在SiO₂核上包覆上厚度为50 nm的TiO₂壳层. 通过自开发的测试设备表征了填料加入前后涂层在1300~1500℃的隔热性能. 结果表明: SiO₂@TiO₂核壳结构粒子加入后, 隔热涂层能将从热源辐射出的热流减少50%, 在热源温度达1500℃时涂层试样的表背温度差为260℃. 加入SiO₂@TiO₂核壳粒子的涂层在高温下隔热效果明显, 是一种很有前景的高温隔热涂层填料.

关键词: 溶胶-凝胶法, 核壳结构, 隔热, 涂层

Abstract:

A novel type of SiO₂@TiO₂ core-shell particles were fabricated as pigments for high-temperature thermal insulation coatings using a Sol-Gel method. TEM images of SiO₂@TiO₂ core-shell particles indicated that TiO₂ shell with a thickness about 50 nm was deposited well on the surface of SiO₂ particles. The thermal insulation properties of the products obtained were characterized by a developed apparatus in the temperature range from 1300℃ to 1500℃. The results show that, using SiO₂@TiO₂ particles as a radiant barrier, the heat flux from radiation sources is successfully reduced by about 50% and the temperature difference reaches 260℃ when radiation heater temperature is 1500℃. The effectiveness of SiO₂@TiO₂ core-shell particles on high-temperature thermal insulation is obvious. The work suggests that SiO₂@TiO₂ core-shell particles are very promising pigments for high-temperature thermal insulation coatings.

Key words: Sol-Gel method, core-shell, thermal insulation, coating

中图分类号:

TQ174

肖世玉, 张跃. SiO₂@TiO₂核壳结构及其在高温下的隔热性能表征[J]. 无机材料学报, 2012, 27(4): 445-448.

XIAO Shi-Yu, ZHANG Yue. A Novel Thermal Insulation Coating with SiO₂@TiO₂ Core-shell Particles and Its In-situ Characterization at High Temperature[J]. Journal of Inorganic Materials, 2012, 27(4): 445-448.

图/表 4

Fig. 1 TEM images of SiO2/TiO2

Fig. 2 FI-IR spectra of films with SiO2/TiO2 and SiO2

Fig. 3 (a) Heat flux passing through films with SiO2@TiO2 and SiO2; (b) Heat flux reduction percentage of SiO2@TiO2 and SiO2

Fig. 4 Temperature difference between upper and lower surfaces of SiO2@TiO2 film and uncoated SiO2 film with the temperature of radiation heater

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SiO₂@TiO₂核壳结构及其在高温下的隔热性能表征

A Novel Thermal Insulation Coating with SiO₂@TiO₂ Core-shell Particles and Its In-situ Characterization at High Temperature

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