Fabrication & characterization of novel conductive nanomaterial, CaxCr0.5−xMg0.5Fe2O4

Abstract

A novel conductive nano material, nano spinel ferrites having the composition of calcium chromium magnesium nanoferrites (Ca x Cr 0.5x Mg 0.5 Fe 2 O 4 ), was fabricated via sol-gel auto combustion process. The main objective was to fabricate highly stable nanocomposite as conductive material. Reaction among highly pure grade magnesium nitrate Mg (NO 3 ) 2 •6H 2 O, calcium nitrate Ca (NO 3 ) 2 •4H 2 O, and chromium nitrate Cr (NO 3 ) 3 •9H 2 O, ferric nitrate Fe (NO 3 ) 3 •9H 2 O took place to fabricate the desired material and, later on, an inductance (L)--capacitance (C)--resistance (R) meter (LCR meter) was used to determine the conductive behavior of the material. During characterization, thermogravimetric study confirmed that the stable phase was obtained above 950 o C. Fabricated ferrite FTIR spectrum was observed between 400 cm 1 and 4,500 cm 1 . The entire sample's structural investigation was carried out employing X-ray diffraction. Morphological analysis confirmed that particles possess angular structures having acute angles adjoining surfaces. During conductivity test, all fabricated nanoferrites presented that with the increase of frequency by LCR meter, AC conductivity had been increased. The outcome of doping of calcium on chromium magnesium nanoferrites on structural in addition to dielectric properties was synergistic.

Structural, dielectric, and thermal properties of Zn and Cr doped Mg- Co spinel nanoferrites

“…This class of nanomaterials is a transition metal and lanthanides base elements. These are known as metal oxide ceramic ferrites and are hard, brittle, non-conducting, iron-containing gray or black, and polycrystalline [9]. By virtue of proficient application, ferrites have a plethora for this field of interest.…”

“…Spinel nanoferrites have a significant variety of usages, including switching and high-frequency devices [11], removal of organic industrial contaminants [16], hyperthermia treatments [17], high-performance energystorage equipment [10], drug delivery for cancer treatment [18], and waste-water management [19]. The spinel structure ferrites also have been used in lithium-ion batteries [20] in antimicrobial [21,22], and microwave applications [23,24]. The crystal structure of spinel soft ferrites has the formula AB 2 O 4 and is an FCC lattice structure with 64 A sites and 32 B sites for one unit cell that contains eight formula units [2].…”

To Study the Structural, Optical and Magnetic Properties of Ni-Fe Doped ZnO Diluted Magnetic Semiconductors

“…In recent, many reported on ZnO with single transition metal-doped prepared by different methods such as Mn-Co codoped [6], Fe-Ni codoped [7], Fe-Co codoped [8], Co-Cu codoped, and Cr-Fe codoped [9]. In recent, there are many other reported, magnesium doped with nano ferrites [10], calcium chromium magnesium nano ferrites [11], Ce-doped Co-Mg-Cd spinel nano-ferrites [12]. Many processes have been discovered to synthesize the nanostructure, they are coprecipitation [13], sol-gel [14], solvothermal [15,16,17,18], sonochemical [19][20], and polymeric citrate precursor [21].…”