Structural, magnetic and gas sensing properties of nanosized copper ferrite powder synthesized by sol gel combustion technique

Thondiyanoor Pisharam Sumangala (1) , Chegonda Mahender (1) , Antoine Barnabé (2) , Narayanan Venkataramani (1) , Shiva Prasad (1)

1 IIT Bombay - Indian Institute of Technology Bombay
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

Stoichiometric nano sized copper ferrite particles were synthesized by sol gel combustion technique. They were then calcined at various temperatures ranging from 300–800°C and were either furnace cooled or quenched in liquid nitrogen. A high magnetisation value of 48.2emu/g signifying the cubic phase of copper ferrite, was obtained for sample quenched to liquid nitrogen temperature from 800°C. The ethanol sensing response of the samples was studied and a maximum of 86% response was obtained for 500ppm ethanol in the case of a furnace cooled sample calcined at 800°C. The chemical sensing is seen to be correlated with the c/a ratio and is best in the case of tetragonal copper ferrite.

Mots clés: Magnetic materials; Nanostructures; Sol–gel combustionsynthesis; X-raydiffraction; In-situ hightemperatureXRD Chemical sensing

Domaines: Matériaux; Matériaux

Thondiyanoor Pisharam Sumangala, Chegonda Mahender, Antoine Barnabé, Narayanan Venkataramani, Shiva Prasad. Structural, magnetic and gas sensing properties of nanosized copper ferrite powder synthesized by sol gel combustion technique. Journal of Magnetism and Magnetic Materials, 2016, 418, pp.48-53. ⟨10.1016/j.jmmm.2016.02.053⟩. ⟨hal-02378851⟩