DEVELOPMENT ON HIGH TEMPERATURE INSULATION MATERIALS. PART II. DEPOSITION AND PROPERTIES OF PYROLYTIC ALUMINUM AND SILICON NITRIDES

1967 ◽  
Author(s):  
D. Berg ◽  
D. W. Lewis ◽  
T. W. Dakin ◽  
D. E. Sestrich ◽  
J. N. Esposito
Keyword(s):  
High Temperature ◽  
Silicon Nitrides ◽  
Insulation Materials

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.

scholarly journals Space Charge Accumulation Phenomena in PI under Various Practicable Environment

2021 ◽  
Author(s):  
Hiroaki Miyake ◽  
Yasuhiro Tanaka
Keyword(s):  
High Temperature ◽  
Space Charge ◽  
High Humidity ◽  
Power Equipment ◽  
Charge Accumulation ◽  
Insulation Materials ◽  
Breakdown Phenomenon ◽  
Operation Environment ◽  
Dielectric Insulation

Polyimide is widely used insulation materials, such as power equipment, motor windings, multi layer insulated, and so on. As the operation environment is high temperature, high humidity, radiation, the dielectric insulation characteristic is decreased compared with pristine one. Especially, the space charge characteristics are obtained big different. Furthermore, the breakdown phenomenon is frequently produced. In this chapter, we discuss the dielectric phenomena through the viewpoints of charge accumulation under the following environment. High temperature, High humidity, DC application, PWM application, Radio-active rays (electron, proton).

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