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 (approx.10/sup 12/ ..cap omega.. cm) and greater nonlinearity (approx.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/cm/sup 2/) and good energy absorption (>40 J/cm/sup 3/) are obtained. Also, the material exhibits a low-temperature coefficient (approx.4 x 10/sup -3//K) and a low dielectric constant (approx.10) with no observed loss peak.
- Research Organization:
- Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6030
- OSTI ID:
- 6932367
- Journal Information:
- J. Appl. Phys.; (United States), Vol. 64:8
- Country of Publication:
- United States
- Language:
- English
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