Sintering-modified oxymanganospinel ceramics for NTC thermistor application

Mixed Ni-Co-Cu oxymanganospinels of Cu<inf>0.1</inf>Ni<inf>0.8</inf>Co<inf>0.2</inf>Mn<inf>1.9</inf>O<inf>4</inf> chemical composition are first developed for possible application as high-precise NTC thermistors using nanophase segregation effects controlled by sintering technological route. It is shown that rack-salt NiO phase in these ceramics occurs a decisive role on parasitic degradation caused by thermal storage of the ceramics at the elevated temperatures.