In this work, we report the effect of uniform decoration of silver sulphide (Ag2S) nanoparticles on physical properties of titanium dioxide (TiO2) nanocrystalline thin films synthesized by using a spin coating technique by preparing TiO2 gel using P-25 TiO2, ethanol, acetyl acetone and p-hydroxybenzoic acid. Chemical bath deposited layer of Ag2S particles enhance the properties of TiO2 nanocrystalline thin films. The optical study reveals that the absorption edge shifts towards the visible region compared with the pure TiO2 thin film due to the incorporation of Ag2S nanoparticles into TiO2 nanocrystalline thin films.
Thermistors are important and attractive in microelectronic and opto-electronic systems due to their unique thermoelectric properties and their applications in air flow sensor, IR detectors, temperature sensors etc. In the present study, mixed transition manganite semiconducting ceramics with spinel structures are used for the preparation of negative temperature co-efficient (NTC) ceramic thermistor. Here, we report the preparation of NTC powders by co-precipitation of chlorides of Mn, Co, Ni and its lead free thick film thermistors. The synthesized NTC powders as well as its thick films were characterized by TGA, XRD, and SEM. The prepared thick film thermistors showed thermistor constant () in the range 3,562-4,334 K over the temperature range of 25-250 ºC.
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