Structural and IR studies on Cu-Ti mixed ferrite

Abstract

The mixed ferrites Cu_1+x Ti _x Fe_2−2x O₄ with x=0, 0.1, 0.2, 0.3 and 0.4 were prepared by standard ceramic techniques. Both structural and IR investigations were carried out. The X-ray diffraction pattern showed that the prepared samples are pure spinels. It is also indicated that the system exists in two crystallographic forms, the tetragonal structure (for x=0, 0.1) and the cubic structure (for the rest of x).

Some physical properties, such as density, porosity and shrinkage were also determined throughout this study.

The IR spectra revealed two bands at 575 cm⁻¹ and 400 cm⁻¹. These bands were assigned as v ₁ and v ₂, respectively. v ₁ and v ₂ are associated with the vibrations of the tetrahedral and octahedral groups, respectively.

The cation distribution (Cu ²⁺ _t Fe ³⁺_1−t ) [Cu ²⁺_1+x−t Ti ⁴⁺ _x −Fe ³⁺_1−2x+t ]O₄ is proposed and used to interpret and explain the obtained results.