低キュリー点PTCサーミスタの赤外線検出特性

概要

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Infrared (IR) sensing properties were investigated for a positive temperature coefficient (PTC) thermistor with a composition of Ba_<0.621>Sr_<0.336>Ca_<0.040>La_<0.003>TiO_3 + 2 mol% SiO_2 + 0.05mol% MnO (the Curie point was 25℃), operated under the self-regulating heating conditions. The results were compared with those of a detector element with the Curie point of 122℃. The sensitivity operated under the self-regulating heating conditions measured at various ambient temperatures in the range from 0° to 30℃ was several times larger than that of the detector element with the Curie point of 122℃. Lowering the operating temperature of the detector by using a PTC thermistor with a low Curie point was shown to be effective for improving the sensitivity.
社団法人日本セラミックス協会の論文
1990-03-01