New varistor material

A composite varistor material containing silicon carbide, a conductor, and an insulator has been developed. The material has rubberlike flexibility and is easily formed. A higher leakage resistivity (∼1012 Ω cm) and greater nonlinearity (∼10) than for silicon carbide varistors permit the material to...

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Veröffentlicht in:	J. Appl. Phys.; (United States) 1988-10, Vol.64 (8), p.4229-4232
Hauptverfasser:	MODINE, F. A, HYATT, H. M
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences BREAKDOWN CARBIDES CARBON COMPOUNDS COMPOSITE MATERIALS ELECTRIC CONDUCTIVITY Electrical engineering. Electrical power engineering ELECTRICAL EQUIPMENT ELECTRICAL PROPERTIES Electronic equipment and fabrication. Passive components, printed wiring boards, connectics Electronics Exact sciences and technology MATERIALS MATERIALS SCIENCE PHYSICAL PROPERTIES RESISTORS SILICON CARBIDES SILICON COMPOUNDS 360603 > Materials-- Properties
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Beschreibung
Zusammenfassung:	A composite varistor material containing silicon carbide, a conductor, and an insulator has been developed. The material has rubberlike flexibility and is easily formed. A higher leakage resistivity (∼1012 Ω cm) and greater nonlinearity (∼10) than for silicon carbide varistors permit the material to be used as a gapless surge suppressor. The breakdown voltage (1–10 kV/cm) and other properties of the material vary with composition. High current capability (>200 A/cm2) and good energy absorption (>40 J/cm3) are obtained. Also, the material exhibits a low-temperature coefficient (∼4×10−3/K) and a low dielectric constant (∼10) with no observed loss peak.
ISSN:	0021-8979 1089-7550
DOI:	10.1063/1.341289