Nano–Crystalline Mn–Ni–Co–O Thermistor Powder Prepared by Co–Precipitation Method

Here, we demonstrate that nano–sized Mn–Ni–Co–O powder can be prepared at a low temperature via co–precipitation method. In this work, Mn2+ was partially oxidized to Mn3+ ions in an aqueous solution by adding oxidizing agent (H2O2). The co-presence of and cations enabled the precipitated products well-crystallized calcining as 650 °C, forming pure cubic spinel structure. pellets fabricated from calcined showed relative density up 97.1% moderate sintering 1100 °C. Moreover, these ceramics exhibited electrical performance suitable for use industrial thermistors, i.e., room resistivity (ρ25) 1232 Ω cm, thermistor constant (B25/85) 3676 K, aging coefficient (ΔR/R) 1.43%. High activity well excellent properties attributed fine-sized particles synthesized powder.