2. NTC thermistors

2.1 Conductivity origin

Negative temperature coefficient thermistors (NTCs) are semiconducting ceramic materials, most often crystallizing in the form of a spinel structure, as shown in figure 3 . The elementary crystal lattice is made up of octahedral and tetrahedral crystallographic sites with oxygen ions at the apexes.

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NTC thermistors

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PTC thermistors

Bibliography

NTC thermistors

CAFFIN (J.P.), ROUSSET (A.), CARNET (R.), LAGRANGE (A.) - Chemical preparation of NTC thermistors with low resistivity and high stability - , High Tech Ceramics. Elsevier (1987).
LAGRANGE (A.) - Conception of electronic ceramics...