Preparation and Characterization of Luminescent Magnetic-Ceramic Composite Material

Abstract

In the present work Eu3+ doped zirconia has been selected as the Photoluminescence compound along with ferrite to prepare a composite. Cobalt ferrite sample has been prepared by combustion synthesis after that, composite of cobalt ferrite (CF) and Eu+3 doped zirconia (ZrO2) was prepared by co-precipitation synthesis by using sodium borohydride as a reducing agent and also composite was prepared by solid-state synthesis. The sample was prepared with Eu+3 doping in three different sample ratio for co-precipitation synthesis and for solid state synthesis in the ratio of ZrO2:CF was (20:80), (80:20) and (99.5:0.5) respectively for both the synthesis. The synthesis powder was calcined at different temperature 600 0C, 800 0C and 1000 0C respectively for 1 hours. Phase analysis and crystal structure has been studied using X-Ray Diffraction (XRD) that shows cubic phase of cobalt ferrite and tetragonal phase of zirconia (in some cases monoclinic) in the composite are present. Field Emission Scanning Electron Microscope (FESEM) and Energy dispersive spectroscopy (EDS) has been done to study about Powder morphology and and elemental composition present in the sample and result shows mostly spherical particle with some plate like morphology are present. Optical properties of 800 0C and 1000 0C calcined samples were studied using photoluminescence spectroscopy (Spectrofluorometer) and the emission spectra has been observed at different excitation wavelength. Powder colour was also studied by using UV radiation that shows that even a small amount of cobalt ferrite addition results severe decreased in intensity of colour of sample.