High Temperature Monitoring by means of Electrical Properties of CMC Materials under Tensile Stress

2017 ◽  
Author(s):  
Tina Staebler ◽  
Hannah Boehrk ◽  
Heinz Voggenreiter
Keyword(s):  
High Temperature ◽  
Electrical Properties ◽  
Tensile Stress ◽  
Temperature Monitoring

Treeing Characteristics in HTV Silicone Rubber

2020 ◽  
pp. 73-104
Keyword(s):  
High Temperature ◽  
Electrical Properties ◽  
Tensile Stress ◽  
Silicone Rubber ◽  
Degradation Process ◽  
Electrode System ◽  
Growth Characteristics ◽  
Insulating Material ◽  
Electrical Tree ◽  
Clamping Device

Silicone rubber (SiR) is widely used as the main insulating material in cable accessories and faces high temperature challenges during operation. Pulse overvoltages can threaten working state of the insulation. In order to understand electrical tree degradation process at high temperature under repeated pulse voltages, stress testing was performed in this experiment. The ambient temperature (Tamb) was set to 30, 60, 90, 120, and 150 ° C, and the frequencies of the pulses were set to 5, 20, 100, 200, and 1000 Hz, respectively. During operation, it is also threatened by mechanical stress, which is caused by the spring-clamping device and the expanded bundling force of the rubber stress cone, which will affect the electrical properties of the silicone rubber in the cable accessory. In this chapter, the growth characteristics of trees under tensile stress and compressive stress were studied by using the needle plane electrode system.

Study of the electrical properties of  Cz p-type solar-grade silicon wafers against the high-temperature processes

2021 ◽  
Vol 127 (6) ◽  
Author(s):  
Mohamed Maoudj ◽  
Djoudi Bouhafs ◽  
Nacer Eddine Bourouba ◽  
Abdelhak Hamida-Ferhat ◽  
Abdelkader El Amrani
Keyword(s):  
High Temperature ◽  
Electrical Properties ◽  
Silicon Wafers ◽  
Solar Grade Silicon ◽  
High Temperature Processes ◽  
Grade Silicon ◽  
P Type

Polyimide Copolymers Containing Various Levels Of The 6F Moiety For High Temperature And Microelectronic Applications

1991 ◽  
Vol 227 ◽  
Author(s):  
M. Haider ◽  
E. Chenevey ◽  
R. H. Vora ◽  
W. Cooper ◽  
M. Glick ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Electrical Properties ◽  
Oxidative Stability ◽  
Trifluoromethyl Group ◽  
Thermal And Mechanical Properties

ABSTRACTTrifluoromethyl group-containing polyimides not only show extraordinary electrical properties, but they also exhibit excellent long-term thermo-oxidative stability. Among the most thermomechanically stable structural polyimides are those from 6F dianhydride (6FDA) and 6F diamines. The effects of substituting non-fluorine containing monomers such as BTDA, mPDA and 4,4′-DADPS for the hexafluoroisopropylidene monomers on the dielectric, thermo-oxidative, thermal and mechanical properties of the copolymers were studied.

High temperature monitoring the height of condensed water in steam pipes

2011 ◽  
Author(s):  
Yoseph Bar-Cohen ◽  
Shyh-Shiuh Lih ◽  
M. Badescu ◽  
Xiaoqi Bao ◽  
Stewart Sherrit ◽  
...  
Keyword(s):  
High Temperature ◽  
Temperature Monitoring ◽  
Condensed Water ◽  
Steam Pipes

scholarly journals Temperature Dependence of Mechanical, Electrical Properties and Crystal Structure of Polyethylene Blends for Cable Insulation

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1922 ◽  
Author(s):  
Lunzhi Li ◽  
Lisheng Zhong ◽  
Kai Zhang ◽  
Jinghui Gao ◽  
Man Xu
Keyword(s):  
High Temperature ◽  
Electrical Properties ◽  
Temperature Dependence ◽  
Elevated Temperatures ◽  
Breakdown Strength ◽  
Temperature Stability ◽  
Xrd Analysis ◽  
Insulation Material ◽  
Cable Insulation ◽  
Polyethylene Blends

There is a long-standing puzzle concerning whether polyethylene blends are a suitable substitution for cable-insulation-used crosslinking polyethylene (XLPE) especially at elevated temperatures. In this paper, we investigate temperature dependence of mechanical, electrical properties of blends with 70 wt % linear low density polyethylene (LLDPE) and 30 wt % high density polyethylene (HDPE) (abbreviated as 70 L-30 H). Our results show that the dielectric loss of 70 L-30 H is about an order of magnitude lower than XLPE, and the AC breakdown strength is 22% higher than XLPE at 90 °C. Moreover, the dynamic mechanical thermal analysis (DMA) measurement and hot set tests suggest that the blends shows optimal mechanical properties especially at high temperature with considerable temperature stability. Further scanning electron microscope (SEM) observation and X-ray diffraction (XRD) analysis uncover the reason for the excellent high temperature performance and temperature stability, which can be ascribed to the uniform fine-spherulite structure in 70 L-30 H blends with high crystallinity sustaining at high temperature. Therefore, our findings may enable the potential application of the blends as cable insulation material with higher thermal-endurance ability.

Fabrication and electrical properties of polymer-derived ceramic (PDC) thin films for high-temperature heat flux sensors

2011 ◽  
Vol 165 (2) ◽  
pp. 250-255 ◽  
Author(s):  
Duckbong Seo ◽  
Sunghoon Jung ◽  
Stephen J. Lombardo ◽  
Z.C. Feng ◽  
J.K. Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Heat Flux ◽  
High Temperature ◽  
Electrical Properties ◽  
Heat Flux Sensors ◽  
Polymer Derived Ceramic ◽  
Temperature Heat
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