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High Purity Mullite-Corundum thermal insulating Firebricks

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International Journal of Minerals,Metallurgy and Materials 1999年第4期13卷 237-241页

作者： Wen Ni Fengmei Liu(Resource Engineering School, University’ of Sctence and Technology Beijing Beijing. 100083, China) Resource Engineering School University of Science and Technology Beijing Beijing 100083 China

Laboratory and industrial experiments were carried out to study the possibility of producing high purity purity mullite-corundumthermal insulating firebricks. The results show that by using industrial alumina. natuual powder power, coal gangues and a small amountof additives. high purity mullite-corundum thermal insulating firebrieks can be produced The service. temperature of these brick can beup to 1780 with low. thermal conductivity' and good thermal shock resistance

关键词： mullite corundum thermal insulating firebricks

Fabrication and thermal insulating Properties of ATO/PVB Nanocomposites for Energy Saving Glass

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Journal of Wuhan University of Technology(Materials Science) 2013年第5期28卷 912-915页

作者：张刚申 YAN Wei 蒋涛 Key Laboratory of Green Preparation and Application for Functional Materials Ministry of EducationHubei University Faculty of Materials Science & Engineering Hubei University

The pechini method was used to synthesize antimony-doped tin oxide （ATO） nanoparticles, and the subsequent solution co-blend was employed to fabricate ATO/PVB nanocomposites. Uv-Vis-NIR spectra show that the addition ofATO nano particles can significantly enhance the thermal insulating efficiency of ATO/PVB nanocomposites. With the increase of ATO content, the thermal insulating efficiency is increased. Uv is almost fully absorbed by all ATO/PVB nanocomposites. Vis transmittance-haze spectra reveal that ATO/ PVB nanocomposites exhibit higher Vis transmittance of over 72.7% and lower haze of below 2% when ATO content is in the range of 0.1 wt%-0.5 wt%. The thermal insulating tests indicate that in comparison with the pure PVB film, nanocomposite films with 0.1 wt%-0.5 wt% ATO can reduce temperature of 1-3 ℃, suggesting that this novel nanocomposite can be used for energy-saving glass.

关键词： polymer nano composites physical properties thermal insulating

Fabrication and thermal insulating Properties of ITO/PVB Nanocomposites for Energy Saving Glass

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Journal of Wuhan University of Technology(Materials Science) 2017年第1期32卷 63-66页

作者：严微 XIAO Haiyan JIANG Tao LI Weibo 张刚申 Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry of EducationKey Laboratory of GreenPreparation and Application for Functional MaterialsHubei Key Laboratory of Polymer MaterialsSchool of Materials Science&EngineeringHubei UniversityWuhan 430062China State Key Laboratory of Silicate Materials for Architectures(Wuhan University of Technology) Wuhan 430070China

Chemical co-precipitation method was used to synthesize tin-doped indium oxide（ITO）nanoparticles,and the subsequent solution co-blend was employed to fabricate ITO/PVB ***（Ultra-violet）-Vis（Visible）-NIR（Near Infrared） spectra show that the addition of ITO nano particles can significantly enhance the thermal insulating efficiency of ITO/PVB *** increasing ITO content,the thermal insulating efficiency is *** is almost fully absorbed by all ITO/PVB *** transmittance-haze spectra reveal that ITO/PVB nanocomposites exhibit higher Vis transmittance over 71.3%and lower haze below 2%when ITO content is in the range of 0.1 wt%-0.7 wt%.The UV-Vis-NIR spectroscopy shows that,under the premise of over 70%transmittance to the visible light,the screening effect of the NIR can be enhanced by 80%with 0.7%ITO/PVB nanocomposite membrane compared with the undoped *** thermal insulating tests indicate that,in comparison with the pure PVB film,nanocomposite films with 0.1 wt%-0.9 wt%ITO can reduce temperature by 3-8 ℃.The results show that this novel nanocomposite can be used for energy-saving glass.

关键词： polymer nano composites physical properties thermal insulating

Porous high entropy(Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)B2: A novel strategy towards making ultrahigh temperature ceramics thermal insulating

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Journal of Materials Science & Technology 2019年第10期35卷 2404-2408页

作者： Heng Chen Huimin Xiang Fu-Zhi Dai Jiachen Liu Yanchun Zhou Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300072China Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China

Transition metal diborides based ultrahigh temperature ceramics(UHTCs) are characterized by high melting point, high strength and hardness, and high electrical and thermal conductivity. The high thermal conductivity arises from both electronic and phonon contributions. Thus electronic and phonon contributions must be controlled simultaneously in reducing the thermal conductivity of transition metal diborides. In high entropy(HE) materials, both electrons and phonons are scattered such that the thermal conductivity can significantly be reduced, which opens a new window to design novel insulating materials. Inspired by the high entropy effect, porous HE(Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)B2 is designed in this work as a new thermal insulting ultrahigh temperature material and is synthesized by an in-situ thermal borocarbon reduction/partial sintering process. The porous HE(Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)B2 possesses high porosity of 75.67%, pore size of 0.3–1.2 μm, homogeneous microstructure with small grain size of 400–800 nm, which results in low room temperature thermal diffusivity and thermal conductivity of 0.74 mm2 s^-1 and 0.51 W m^-1K^-1, respectively. In addition, it exhibits high compressive strength of3.93 MPa. The combination of these properties indicates that exploring porous high entropy ceramics such as porous HE(Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)B2 is a novel strategy in making UHTCs thermal insulating.

关键词： High entropy ceramics (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)B2 Transition metal diborides Porous materials thermal insulating In-situ reaction/partial sintering

Modification of YSZ fiber composites by Al_(2)TiO_(5) fibers for high thermal shock resistance

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Journal of Advanced Ceramics 2022年第6期11卷 922-934页

作者： Wei LIU Yongshuai XIE Zhezhe DENG Ying PENG Jianhong DONG Ze ZHU Dehua MA Luyi ZHU Guanghui ZHANG Xinqiang WANG State Key Laboratory of Crystal Materials School of Crystal MaterialsShandong UniversityJinan 250100China

Yttria-stabilized zirconia(YSZ)fiber composites are highly efficient thermal insulating materials;however,the poor thermal shock resistance limits their versatile *** the present study,YSZ fiber was mixed directly with Al_(2)TiO_(5)fiber,which had an extremely low thermal expansion coefficient,to prepare YSZ–Al_(2)TiO_(5)(ZAT)fiber composites by compression molding and heat *** minimum thermal expansion coefficient of the prepared ZAT fiber composites was measured to be 7.74×10^(−6)K^(−1),which was 26%lower than that of the YSZ fiber composites(10.42×10^(−6)K^(−1)).It was shown that the prepared ZAT fiber composites maintain the integrity after undergoing 51 thermal shock cycles between 1100℃and room ***,YSZ fiber composites burst immediately after only one thermal shock cycle under the same *** addition,the ZAT fiber composites also exhibit considerable mechanical and thermal insulating performance.

关键词： Al_(2)TiO_(5)fibers YSZ-Al_(2)TiO_(5)fiber composites thermal expansion thermal shock resistance thermal insulating