Experimental and numerical research on high‐temperature thermal insulation performance of lightweight porous ceramic/nanomaterial composite structure

2019 ◽  
Vol 50 (12) ◽  
pp. 1525-1536
Author(s):  
H.Y. Ren ◽  
D.F. Wu ◽  
W.J. Wu ◽  
J.N. Li ◽  
L.J. Lin
Keyword(s):  
High Temperature ◽  
Thermal Insulation ◽  
Composite Structure ◽  
Porous Ceramic ◽  
Numerical Research ◽  
Insulation Performance

scholarly journals Multichannel and Super-flexible SiZrOC Ultrafine Fibers for High Temperature Thermal Insulation

2021 ◽  
Author(s):  
Xiaoshan Zhang ◽  
Qiong Tian ◽  
Bing Wang ◽  
Nan Wu ◽  
Cheng Han ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermal Insulation ◽  
Porous Ceramic ◽  
Temperature Stability ◽  
Ceramic Fibers ◽  
High Temperature Stability ◽  
Electrospinning Technique ◽  
Excellent Thermal Stability ◽  
Ultrafine Fibers ◽  
Insulation Performance

Abstract Light but robust porous ceramic fibers with combined properties of super flexibility, excellent thermal stability and thermal insulation performance are attractive for use in extreme conditions, especially in the field of aerospace. However, the practical application of traditional porous ceramic fibers are usually limited by their brittle nature and poor mechanical properties. Herein, we designed a multichannel SiZrOC ultrafine fiber (MSUF) composed of ZrO2, SiOxCy and free carbon phases by electrospinning technique. The resulting fibers exhibited integrated properties of excellent fire resistance, high temperature stability, thermal shock resistance and temperature-invariant flexibility. More importantly, the fancy multichannel structure and components of the fiber provides it with outstanding thermal insulation performance with low thermal conductivity (0.041 W m-1·K-1 at 25 ºC and 0.141 W m-1·K-1 at 1000 ºC). The successful fabrication of such flexible porous MSUFs may provide a new approach to design high performance thermal insulators for high temperature thermal insulation.

Thermal insulation performance of monoclinic ZrO2 and cubic ZrO2–CaO solid solution under high pressure and high temperature

2018 ◽  
Vol 38 (4) ◽  
pp. 458-467 ◽  
Author(s):  
Akun Liang ◽  
Yinjuan Liu ◽  
Hao Liang ◽  
Fangming Liu ◽  
Cong Fan ◽  
...  
Keyword(s):  
Solid Solution ◽  
High Pressure ◽  
High Temperature ◽  
Thermal Insulation ◽  
Monoclinic Zro2 ◽  
Insulation Performance

scholarly journals New BN/SiOC aerogel composites fabricated by the sol-gel method with excellent thermal insulation performance at high temperature

2020 ◽  
Vol 185 ◽  
pp. 108217 ◽  
Author(s):  
Haixia Yang ◽  
Chunming Li ◽  
Xiandong Yue ◽  
Jianchun Huo ◽  
Feng Ye ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermal Insulation ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Insulation Performance

Improvement in the high temperature thermal insulation performance of Y2O3 opacified silica aerogels

2017 ◽  
Vol 727 ◽  
pp. 871-878 ◽  
Author(s):  
Vinayak G. Parale ◽  
Hae-Noo-Ree Jung ◽  
Wooje Han ◽  
Kyu-Yeon Lee ◽  
Dinesh B. Mahadik ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermal Insulation ◽  
Silica Aerogels ◽  
Insulation Performance

scholarly journals Fabrication of a Novel MgO-B2O3-SiO2-Zn Coating by Thermal Spraying

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 907
Author(s):  
Zhan Yu ◽  
Bo Song ◽  
Ping Ma ◽  
Wenhui Fan ◽  
Enzhong Gong ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermal Insulation ◽  
Thermal Spraying ◽  
Flame Spraying ◽  
Maintenance Cost ◽  
Insulation Layer ◽  
Ceramic Powders ◽  
Insulation Materials ◽  
Automotive Technology ◽  
Insulation Performance

In automotive technology, the proper use of thermal insulation materials helps improve the performance and life of internal equipment and reduce maintenance cost. In this study, plasma spraying and flame spraying are used to prepare and coat a new MgO-B2O3-SiO2-Zn powder on the SUS304 substrate. The resulting coating as thermal insulation layer formed a networked microstructure between the substrates to improve the thermal insulation performance of the material. By validation of thermal radiation experiments, the thermal insulation effects of various ceramic powders were compared, the high-temperature and low-temperature thermal insulation materials for about 300 and 100 °C were determined, and the thermal insulation performance of the constructed material coatings was verified by analysis.

The Insulated Effect of New Inorganic Coatings on the Surface of Fiber Paper

2008 ◽  
Vol 373-374 ◽  
pp. 682-685
Author(s):  
Fei He ◽  
Xiao Dong He ◽  
J.F. Li ◽  
Ming Wei Li ◽  
S.M. Zhang
Keyword(s):  
High Temperature ◽  
Thermal Insulation ◽  
Random Network ◽  
Inorganic Coatings ◽  
Insulation Effect ◽  
Service Conditions ◽  
Fiber Materials ◽  
Insulation Performance ◽  
Continuous Random Network ◽  
Made In

The unitary thermal insulation fiber materials can not satisfy rigorous high temperature environment usually. New inorganic coatings were prepared by adding SiO2 aerogels super-insulation powder into high temperature adhesive. Aerogels are high dispersive solid materials which consist of colloid particles or high polymer molecule and have continuous random network structure filling with gaseous dispersive medium. The coatings with super insulation function were made by means of adding thermal-proof materials to the coatings. The microstructure of light porous power and the states of coatings on the surface of fiber paper under different state were observed by scanning electron microscope (SEM). The insulated effect of the composite materials was tested by considering thermal conductivity. On the basis of this, the coatings on the surface of fiber paper were optimized according to the material thermal-insulation performance and the materials that could be satisfactory to the service conditions were made in the end. The results show that silica aerogels powder is dispersed equably in high temperature adhesive. The new inorganic coatings possess themselves of good thermal-insulation effect and can be used as insulated space-layers. The insulation ability of fiber paper is improved obviously.

Effect of Moisture Absorption on High Temperature Thermal Insulation Performance of Fiber Insulation Materials

2016 ◽  
Vol 697 ◽  
pp. 445-448
Author(s):  
Hao Ran Sun ◽  
Si Chao Zhang ◽  
Shu Guang Chen ◽  
Guang Hai Wang ◽  
Liu Shi Tao ◽  
...  
Keyword(s):  
High Temperature ◽  
Pore Size ◽  
Thermal Insulation ◽  
Moisture Absorption ◽  
Fiber Material ◽  
Insulation Material ◽  
Insulation Property ◽  
Effect Of Moisture ◽  
Thermal Insulation Property ◽  
Insulation Performance

In this paper, effect of moisture absorption on high temperature thermal insulation performance of fiber insulation material is studied. Fiber material is stored in 40°C through a long period of time, then spontaneous moisture absorption of fiber material is measured. According this test result, 20% and 40% moisture absorption content gradient are determined. Pore distribution and high temperature thermal insulation property of samples of 20% and 40% moisture absorption and the dry samples are all tested in this study. The internal pore size distribution of fiber insulation material after moisture absorbing has a certain coarsening. Fiber material after moisture absorbing will make its pore size become large. And oxygen acetylene test results showed that: the larger moisture absorption, the more slowly the initial temperature rises. Fiber material after moisture absorbing will make its low temperature thermal insulation performance reduce, but it has little impact of its high temperature thermal insulation performance.

Microtexture, Microstructure Evolution and Thermal Insulation Performance of Carbon Aerogels with High-Temperature Treatment

2019 ◽  
Vol 11 (12) ◽  
pp. 1692-1698 ◽  
Author(s):  
Haixia Yang ◽  
Jianchun Huo ◽  
Chunming Li ◽  
Feng Ye ◽  
Jingxiao Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Specific Surface ◽  
Surface Area ◽  
Thermal Insulation ◽  
Specific Surface Area ◽  
Microstructure Evolution ◽  
Temperature Treatment ◽  
High Temperature Treatment ◽  
Carbon Aerogels ◽  
Insulation Performance

The microtexture, microstructure evolution and thermal insulation performance of carbon aerogels subjected to high-temperature treatment were investigated in detail. The results showed that carbon aerogels derived from resorcinol-formaldehyde (RF) resin were composed of fine particles and cavities, which consisted of typical non-graphitized carbon according to X-ray diffraction analysis. The microcrystallite size (La) of the CAs increased from 4.49 nm to 6.92 nm, and the specific surface area (SBET) and the total pore volume (Vtal) decreased from 727 to 290 m2/g and from 0.963 to 0.543 cm3/g, respectively, as the temperature increased from 900 °C to 1800 °C. The micropore-specific surface area and the micropore volume decreased with increasing treatment temperature, and a small amount of macropores (>50 nm) appeared at a temperature of 1500 to 1800 °C. The carbon aerogels retained their porous structure at higher temperature, which indicated that they hold potential for application in the field of thermal insulation in high-temperature environments.

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