Nickel manganite spinel (NiMn2O4) based negative temperature coefficient (NTC) thermistors have good
thermistor characteristics and stabilities. However, to achieve thermistors with a high B constant, the
activation energy should be high, which results in high room temperature (RT) resistivity. To obtain a
high B constant and low RT resistivity, NiMn2O4 based nanocomposite thick films with the conducting
metal oxide, LaNiO3, were fabricated on a glass substrate by aerosol deposition at room temperature.
The NiMn2O4–LaNiO3 nanocomposite thick films showed an RT resistivity as low as 35 kX cm, which
is one order of magnitude lower than that of the NiMn2O4 films, while retaining the high B constant of
NiMn2O4 of over 5000 K when 25 vol.% LaNiO3 was used without any post thermal treatment.
Nickel manganite spinel (NiMn2O4) based negative temperature coefficient (NTC) thermistors have goodthermistor characteristics and stabilities. However, to achieve thermistors with a high B constant, theactivation energy should be high, which results in high room temperature (RT) resistivity. To obtain ahigh B constant and low RT resistivity, NiMn2O4 based nanocomposite thick films with the conductingmetal oxide, LaNiO3, were fabricated on a glass substrate by aerosol deposition at room temperature.The NiMn2O4–LaNiO3 nanocomposite thick films showed an RT resistivity as low as 35 kX cm, whichis one order of magnitude lower than that of the NiMn2O4 films, while retaining the high B constant ofNiMn2O4 of over 5000 K when 25 vol.% LaNiO3 was used without any post thermal treatment.
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