ac hopping admittance in spinel manganate negative temperature coefficient thermistor electroceramics

Spark Plasma Sintering of Negative Temperature Coefficient Thermistor Ceramics

A New Structure for Direct Measurement of Temperature Based on Negative Temperature Coefficient Thermistor and Adaptive Neuro-fuzzy Inference System

Thermistors are very commonly used for narrow temperature-range high-resolution applications, such as in medicine, calorimetry, and near ambient temperature measurements. In particular, Negative Temperature Coefficient (NTC) thermistor is very inexpensive and highly sensitive, whose sensing temperature range and sensitivity are highly limited due to the intrinsic nonlinearity and self-heating p...

Small polaron hopping in spinel manganates

The temperature dependence of small polaron hopping conduction in ceramic spinel NiMn2O4+ thermistor material has been investigated. We used a theoretical framework based on a random resistor network model to describe small polaron nearest-neighbor hopping NNH and variable range hopping VRH , following the principles of Shklovskii and Efros. We find that in printed thick films and in pressed pe...

Unipolar memristive Switching in Bulk Negative Temperature Coefficient Thermosensitive Ceramics

A memristive phenomenon was observed in macroscopic bulk negative temperature coefficient nickel monoxide (NiO) ceramic material. Current-voltage characteristics of memristors, pinched hysteretic loops were systematically observed in the Ag/NiO/Ag cell. A thermistor-based model for materials with negative temperature coefficient was proposed to explain the mechanism of the experimental phenomen...

A SIMPLE MODEL OF ac HOPPING CONDUCTIVITY

The physics of ac hopping conduc2ivity in disordered solids is discussed in the light of a recently proposed model. Several new comments are made. One of the most interesting facts about conductivity in disordered solids is the surprising similarity between ionic and electronic conductivity. The same kinds of non-linearities in strong electric fields are observed, and ionic and electronic condu...