Electrical insulation thermal endurance

The stability of ceramic materials at high temperatures has made them useful as furnace liners and has led to interest in ceramic automobile engines, which could endure overheating. Currently, a typical automobile contains about 35 kg of ceramic materials such as spark plugs, pressure and vibration sensors, brake linings, catalytic converters, and thermal and electrical insulation. Some fuel cells make use of a porous solid electrolyte such as zirconia, Zr02, that contains a small amount of calcium oxide. It is an electronic insulator, and so electrons do not flow through it, but oxide ions do. 

IEC 60216, Parts 1-5, Guide for the determination of thermal endurance properties of electrical insulating materials, 1990-2001. 

IEC 60216, Electrical insulating materials - Properties of thermal endurance, 1990-2001. 

The only procedure to have been standardised generally is application of the Arrhenius relation (see below). IEC 21662 is a guide to evaluating the thermal endurance of electrical insulating materials and ISO 257863 applies the same principle to determining time/temperature limits to plastics. In both cases, the accent is more on finding maximum service temperatures rather than extrapolating to normal ambient temperature. Use of the same... 

VDE 0304-8 Electrical insulating materials - Thermal endurance properties - Part 8 Instructions for... 

Roy M, Nelson JK, MacCrone RK, Schadler LS, Reed CW, Keefe R, Zenger W (2005) Polymer nanocomposite dielectrics—the role of the interface. IEEE Trans Diel Electr Insul 12 629-643 Roy M, Nelson JK, MacCrone RK, Schadler LS (2007) Candidate mechanisms ctmtrolling the electrical characteristics of silica/XLPE nanodielectrics. J Mater Sci 42 3789-3799 Saccani A, Motori A, Patuelli F, Montanari GC (2007) Thermal endurance evaluation of isotactic poly(propylene) based nanocomposites by short-term analytical methods. TREE Trans Diel Electr Insul 14 689-695... 

DIN EN 60216 Electrical insulating materials — Properties of thermal endurance (lEC 60216) German version EN 60216... 

The high specific strength or stiffness, thermal and electrical insulation capabilities, and the fatigue-endurance limits of fiber composites are the chief reasons for their cryogenic applications. The polymeric matrix plays an important part, and for several properties, constitutes the limiting factor. 

Guide for the Determination of the Thermal Endurance Properties of Electrical Insulating Materials, Publication 216, International Electrotechnical Commimications (lEC), Geneva, Switzerland. 

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