An investigation of molar ratio acid citric on the structure, magnetic and dielectric properties SrNi2Fe16O27 nanostructure

Document Type : Full length research Paper

Authors

1 Student

2 Remeber faculty

Abstract

In this paper, W-type hexaferrites nanostructure with SrNi2Fe16O27 composition with molar ratio of acid citric 1, 1.5 and 2 were prepared by sol-gel auto combustion method. First, the gel of samples was ignited at 300 oC and powders were annealed at 900, 1000 and 1100 oC temperatures. Nanostructures of papered were characterized by X-ray diffraction pattern devices (XRD), Field emission scanning electron microscope (FESEM), Fourier transform infrared spectrophotometer (FT-IR) and vibrating sample magnetometer (VSM). The X-ray diffraction pattern of samples show that in mole ratio of 1 pure phase was formed at 1000 oC and by increasing the molar ratio the temperature for formed SrNi2Fe16O27 phase increased. The results of field emission scanning electron microscope showed that in different molar ratios, various morphology is obtained and by increasing the molar ratio of citric acid, the size of the particles increases. The peaks of FT-IR absorption samples in rang of 430-590 cm-1 and 550-590 cm-1 is corresponding to tetrahedral and octahedral sites in the ferrites. Hysteresis curve of the samples showed that by increasing the molar ratio of citric acid, the specific saturation magnetization increasing and also the coercivity decreases.

Keywords

References

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History

  • Receive Date: 01 July 2015
  • Revise Date: 04 December 2015
  • Accept Date: 19 June 2016

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