Abnormal Resistance Properties in PTCR Barium Titanate
Source abstract
Abstract
In this paper the resistance properties of PTCR barium titanate [Ba0.93Sr0.03Ca0.04 TiO3＋xmolY2O3＋1wt% AST] were measured near Curie-temperature by a complex impedance analyzer(HP4192A) from 10Hz to 10MHz. It was observed that PTCR sample exhibits an abnormal negative-temperature- coefficient in frequencies higher than 50kHz. This phenomenon can be simply explAlNed by the two dielectric-layer model, and with this model, the behavior of effectivedielectric constant and its loss in wide frequency range can be explAlNed as well.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Dielectric materials and actuators · Acoustic Wave Resonator Technologies
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