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Preparation of cubic cobalt microspheres by mechanical solid state reaction thermal decomposition and its growth kinetics

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Document pages: 10 pages

Abstract: Cubic cobalt (CO) is not easy to obtain at room temperature because of its good ductility and internal structure. It can be used as a key component of composites. In this study, a stable five membered chelating ring cobalt oxalate precursor was synthesized from oxalic acid and cobalt nitrate. Cobalt oxalate microspheres with high internal energy content were prepared by mechanical solid-state reaction in the presence of surfactant. The microspheres can produce spherical micelles. The thermal decomposition of the precursor was carried out by keeping it in nitrogen atmosphere at 450 ° C for 3 hours   h. at the end of the procedure, 100   room temperature stable nano cubic phase co microspheres were prepared. Isothermal sumonisothermal kinetic mechanisms of cobalt grain growth were investigated. The cubic-Co grain growth activation energy, , was calculated in this study to be 71.47 kJ mol. The required reaction temperature was low, making the production process simple and suitable for industrial applications.

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