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説明
<jats:p>An anomalous positive temperature coefficient (PTC) of resistance was found in a conductor–insulator ceramic composite. The composite materials was composed of randomly dispersed conducting graphite and insulating cristobalite‐form SiO<jats:sub>2</jats:sub> particles. The PTC effect occurred at exactly 230°C, that is, at a reversible phase inversion point with a large thermal expansion of cristobalite. The magnitude of the PTC anomaly was high in composites located in the middle of the percolation curve, and loaded with large graphite and fine SiO<jats:sub>2</jats:sub> particles.</jats:p>
収録刊行物
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- Journal of the American Ceramic Society
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Journal of the American Ceramic Society 75 1772-1776, 1992-07-01
Wiley