scholarly journals Research Progress on Alumina Aerogel Compositesfor High-Temperature Thermal Insulation

2020 ◽  
pp. 404
Author(s):  
Fei PENG ◽  
Yonggang JIANG ◽  
Jian FENG ◽  
Huafei CAI ◽  
Junzong FENG ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermal Insulation ◽  
Research Progress ◽  
Alumina Aerogel

The Research Status of Self-Compensation Lubricating Composites at High Temperature

2013 ◽  
Vol 470 ◽  
pp. 108-111
Author(s):  
Ying Han ◽  
Yan Jun Wang ◽  
Shou Ren Wang
Keyword(s):  
High Temperature ◽  
Matrix Material ◽  
Research Progress ◽  
Lubrication Mechanism ◽  
Research Status

It is significant and necessary to carry out the development of self-compensation lubricating composites. In this paper, the current research of self-lubrication composites is summarized. The lubrication mechanism of the high temperature self-compensation lubricating composites is introduced and the research progress of matrix material and lubricant material of the composites is reviewed.

ZIRCONIA FIBERS AS A COMPONENT OF HIGH TEMPERATURE THERMAL INSULATION (review)

2021 ◽  
pp. 79-86
Author(s):  
V.G. Babashov ◽  
◽  
N.M. Varrik ◽  
Keyword(s):  
High Temperature ◽  
Thermal Insulation ◽  
Zirconium Oxide ◽  
Thermal Protection ◽  
Sol Gel ◽  
Precursor Solution ◽  
Technical Literature ◽  
Thermal Protection Systems ◽  
Insulation Materials ◽  
Protection Systems

Based on the analysis of recent publications of scientific and technical literature, data on the production of zirconium oxide fibers used for the manufacture of high-temperature thermal insulation materials are presented. Information is provided on various methods of obtaining zirconium oxide fibers (methods of impregnation of the template and molding of the mixture, sol-gel method of spinning a fiber-forming precursor solution), as well as on the technique of fiber molding (manual pulling, dry and wet spinning, blowing and electrospinning). The use of such fibers for the production of thermal insulation materials (felts, cords and blocks) instead of currently existing materials made of aluminum oxide-based fibers can significantly increase the operating temperatures of the thermal protection systems.

Novel Kevlar® pulp-reinforced alumina-silica aerogel composites for thermal insulation at high temperature

2022 ◽  
Author(s):  
Mariana E. Ghica ◽  
Cláudio M. R. Almeida ◽  
Laura S. D. Rebelo ◽  
Gabriel C. Cathoud-Pinheiro ◽  
Benilde F. O. Costa ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermal Insulation ◽  
Silica Aerogel

Thermal insulation characteristics of a lightweight, porous nanomaterial in high-temperature environments

2018 ◽  
Vol 140 ◽  
pp. 376-386 ◽  
Author(s):  
Haoyuan Ren ◽  
Dafang Wu ◽  
Junning Li ◽  
Wenjun Wu
Keyword(s):  
High Temperature ◽  
Thermal Insulation

Novel Elastomer Materials for Extreme Temperature Operation in Subsea Thermal Insulation Applications at Unlimited Water Depth

2021 ◽  
Author(s):  
Adam Jackson ◽  
Rodrigo Diaz ◽  
Heidi Svalund ◽  
Raymond Hansen ◽  
Grethe Hartviksen
Keyword(s):  
High Temperature ◽  
Thermal Insulation ◽  
Water Depth ◽  
Extreme Temperature ◽  
Base Material ◽  
Development Project ◽  
Pressure Vessels ◽  
Hand Tools ◽  
Gentle Pressure ◽  
Cost Efficient

Abstract Rubber based systems have been used in subsea thermal insulation for many years and have proven themselves to be reliable and cost efficient. Formulations have been changed over the years, pressing the maximum usage temperature upwards and into the realm of 160 to180°C in a hot-wet environment. Until recently there was a need for high temperature along with pressure vessels (autoclaves) for vulcanisation. This has limited the widespread use of such systems. Recent changes have eliminated the need for autoclaves, however the high temperature vulcanisation hasstill been required. A novel formulation has been developed to address these shortcomings, so that this class of materials could have wider use. This new material employs freely available materials in a unique blend. The material contains no hydrolysable groups and can operate from −40°C to 180°C continuously in air and in a hot-wet environment and retains its resilience and flexibility; and thus opening for use in both high and low temperature systems. The formulation does not include the use of hollow glass microspheres and is, correspondingly, without water depth limitations. A new, highly reliable vulcanisation chemistry allows for a stable latency time for application, with vulcanisation temperatures reduced to 50°C. This allows for rapid hand application and simultaneous vulcanisation on subsea trees, valves, manifolds, etc. The material is self-agglomerating, merging under gentle pressure, and can be applied at high thickness. As the base material has an intrinsically low thermal conductivity, glass-based fillers are not needed. The material adheres well to painted or primed surfaces and to many other materials typically used in the offshore thermal insulation industry. The 2-component material is conveniently combined on site, reducing the need for refrigeration during transport and easing mobilisation logistics and is applied using simple hand tools. Extruded profiles can be used directly on complex structures or combined into sheets for ease of application on more regular shapes in order to optimise application rates. Moulds are not required for application, reducing engineering and fabrication cost, while also shortening mobilisation time. The system has been extensively qualified according to ISO 12736 for continuous use at 180°C. This paper will detail important aspects of the development project along with the results of the qualification testing.

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