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Moreover, It can be easily recognized that some such devices could also be capable of acting as their own control mechanism as in
for example a PTC device. These devices are capable of controlling an electrical current by continuously adjusting resistance through joules heating such as those based on barium titanate (A), where, primarily,
advantage is taken of a ferroelectric/paraelectric phase transition (B) and its influence on the electrical conduction across the grain boundary: |
