Ferrite Materials: Introduction, Synthesis Techniques, and Applications as Sensors

ABSTRACT

The present review summarizes, in a detailed introduction, the synthesis techniques, structures, classifications, uses, properties, and applications of ferrite materials in the fields of sensors. Morphological and structural studies of ferrite materials were performed. A great advantage of ferrites is their porosity, which is necessary for a sensor. These pores serve as humidity or gas adsorption sites and the sensitivity of sensor depends on the size of these pores. The variation in sensitivity with operating temperature at different concentrations of gas for sensing elements CuFe₂O₄, CdFe₂O₄, and ZnFe₂O₄ is discussed. In addition, resistivity–humidity a characteristic and sensitivity for the MgFe₂O₄ and Mg_0.9Sn_0.1Fe₂O₄ corresponding to different values of percentage of relative humidity is discussed.

KEYWORDS:

• spinel
• ferrites
• magnetic
• sensitivity
• surface morphology
• synthesis techniques
• sensor

Acknowledgments

Dr. Richa Srivastava is grateful to the University Grants Commission Delhi for a Post Doctoral Fellowship for Women, No. F.15-79/11 (SA-II).