THERMOGRAVIMETRIC ANALYSIS, OPTICAL AND DIELECTRIC PROPERTIES OF NEWLY DEVELOPED LiNi0.5PrxFe2−xO4 NANOCRYSTALLINE FERRITES

Digest Journal of Nanomaterials and Biostructures

Z. A. Gilani¹ 

关键词: Li-Pr;    Praseodymium;    Nanocrystalline ferrites;    TGA;    Microemulsion;    Dielectric parameters;   

DOI  :  

学科分类：生物技术

来源: Institute of Materials Physics

【 摘 要 】

A series consisting of six samples of Li0.5Ni0.5PrxFe2-xO4 spinel ferrites with different molar concentrations have been fabricated by using facile micro-emulsion method. Studies like TGA/DTA, Fourier transform infrared spectroscopy (FTIR), dielectric properties were employed to see the result of praseodymium doping on structural, optical and dielectric factors. TGA graph elucidates the decrease in weight as temperatures rise but this weight loss becomes smooth after 800°C and limits at 950°C, hence no further weight loss. Single phase formation is confirmed at this temperature range. The FTIR spectroscopy inveterate the intrinsic cation vibrations of metal ions of the spinel structure, these are found between 400 and 1000 cm−1. The dielectric studies are carried out between ranges of 1MHz to 3GHz frequency of the applied electric field. The dielectric parameters deceased by praseodymium substitutions. Moreover, a decreasing effect is also seen by the increasing the frequency. This kind of domino effects in dielectric parameters indicates the use of these nanocrystalline ferrites in the synthesis of microwave devices. The devices made by this kind of materials will be operated at GHz frequencies ranges.

【 授权许可】

Unknown