Influence of B3+- and Na+-ions on electrical property and temperature sensitivity of NiO-based ceramics

Electrical properties of Nb/Al-doped CuO-based ceramics for NTC thermistors

“…Al 3+ ion acts as a donor in CuO crystal, in which the weakly bound electrons can be thermally activated to jump to the conduction band and provide electronic conduction. Element doping can effectively regulate the conductivity of a semiconductor material and there is an optimized dopant content for a certain material [12][13][14][15][16][17][18]. As shown in Fig.…”

“…To a specific NTC thermistor system, it should be of practical application value to achieve both adjustable ρ 25 and appropriate B values by element doping. Ceramics based on single oxides such as SnO 2 , NiO, CuO and vanadium oxides were studied due to their excellent NTC characteristics, and both ρ 25 and B value can be effectively adjusted by oxide doping and element substitution [12][13][14][15][16][17][18]. Copper oxide (CuO), a semiconducting material with a band gap of about 1.4 eV, is one of the widely used materials because of its unique electrical conductivity, optical/catalytic properties, chemical stability and low cost [19].…”

Electrical conductivity and temperature sensitivity of Cu/Mo co-modified YFeoO ceramics

“…The negative temperature coefficient (NTC) thermistors have always been of great research significance and wide applications due to their advantages, such as fast response, high accuracy, inexpensive and wide operating temperature range [1][2][3][4][5]. In recent decades, most moderate-temperature NTC thermistors have been based on AB 2 O 4 -type spinel compounds, which usually consist of transition metal elements [2,[6][7][8][9].…”