Abstract
Miniature thermistors are produced from boron-doped synthetic single-crystal diamonds grown under pressure using the thermal gradient method. It is shown that heavily doped diamonds with a boron concentration of 1019 cm−3 or higher are most suitable for this purpose. In the temperature range of 300–700 K, coefficient β = ln(R1/R2)/(1/T1 − 1/T2) is 2500 K. The characteristic response time of temperature-sensitive elements based on crystals with dimensions of 1 × 1 × 0.3 mm is ∼100 µs; i.e., they can be used in monitoring systems with a response speed of up to 10 kHz.
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