Effect of sintering temperature and thermoelectric power studies of the system MgFe2−xCrxO4

Hankare, P.P.; Vader, V.T.; Sankpal, U.B.; Gavali, L.V.; Sasikala, R.; Mulla, I.S.

doi:10.1016/j.solidstatesciences.2009.09.005

Cited by 10 publications

(4 citation statements)

References 17 publications

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“…The negative value of thermoelectric power found over the entire temperature range studied shows that the majority charge carriers are electrons. A similar variation of thermoelectric power with temperature was observed in Mg-Cr [9] and Lithium ferrites [10]. The values T s (K) for each composition are given in the Table 1.…”

Section: Temperature Dependence Of Thermoelectric Powersupporting

confidence: 72%

High-Temperature Thermoelectric Power Studies of Ni-Mg Ferrites

Gaffoor¹,

Ravinder²

2012

WJCMP

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Thermoelectric Power studies of Ni-Mg ferrites having chemical formula Ni1–xMgxFeO4 (x = 0.2, 0.4, 0.6 and 0.8) were investigated from room temperature to well beyond Curie temperature by the differential method. The Seebeck coefficient is negative for all the composition. It clearly speaks that all the considered ferrite compositions behave as n-type semiconductors. Plots of Seebeck coefficient (S) versus temperature shows maximum at Curie temperature. The values of the charge carrier concentration have been computed from the observed values of Seebeck coefficient. The electrical properties of the Ni-Mg mixed ferrites have been measured at room temperature by two-probe method. On the basis of these results an explanation for the conduction mechanism in Ni-Mg mixed ferrites is suggested

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Section: Temperature Dependence Of Thermoelectric Powersupporting

confidence: 72%

High-Temperature Thermoelectric Power Studies of Ni-Mg Ferrites

Gaffoor¹,

Ravinder²

2012

WJCMP

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“…The crystallite size was found to be in the range of 11.4 nm to 26.7 nm for various compositions with a notable increase in size corresponding to the rise in Cobalt content (x) as shown in the Table 1. Lattice parameter 'a' of all heated samples was calculated using the formula The XRD data can be used to confirm the formation of single phase by determining the tetrahedral and octahedral site radii viz., r A and r B respectively using the following relations [21]:…”

Section: Xrd Analysismentioning

confidence: 99%

Synthesis and Antimicrobial Study of Co-Ni-Cd Nanoferrites

Raghasudha

2020

Magnetic Oxides and Composites II

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Co x Ni 0.5 Cd 0.5-x Fe 2 O 4 (x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5) nanoferrites were synthesized by citrate-gel auto combustion method. Antimicrobial study was tested on Gram-negative bacteria and Gram-positive bacteria by adopting disc-diffusion agar method. The prepared nanoferrites show excellent antimicrobial function with a zone of inhibition of 10-12 mm against E. coli, 5-7 mm against K. pneumonia, 9-12 mm against B. subtilis and 5-7 mm against S. aureus. Inhibition of the growth was ascertained with reference to Ampicillin, a standard antibacterial drug, that acts as positive control. The antibacterial properties of the prepared ferrites bid great challenges in biomedical and pharmaceutical applications.

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“…1. Here the metal precursor takes comparatively lower temperature for the formation of single phase oxide than that was required for the samples synthesized by coprecipitation method [7]. The initial weight loss before 120°C in TGA curve is attributed to evaporation of residual water.…”

Section: Tga-dta Analysismentioning

confidence: 99%

“…Recently, a work on ferrospinels based Cr substituted magnesium ferrites prepared by co-precipitation method was reported for their structural characterization and electronic properties [7]. This work is further extended for its facile synthesis by gel combustion to utilize the synthesized compounds as a photocatalysts for degradation of dyes.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic performance of fine particles of Cr doped magnesium ferrites prepared by sol–gel combustion route

Vader

2014

J Mater Sci: Mater Electron

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The present wet chemical route overcome all drawbacks of conventional processes and produce ultrafine, homogeneous reproducible ferrite powders using aqueous solutions of nitrate salts of constituent ions. The study is investigated for the application of system MgFe 2-x Cr x O 4 (0.0 B x B 1.0) in photo decoloration and degradation of MO, MR and CR dyes. The precipitation methods always have the disadvantage that the stoichiometry of the precipitate may not be exact if one or more ions are left in solution. The sol-gel route overcomes this because the reactants never precipitate out. The basic aim of this study is photocatalytic performance of synthesized compounds for effective degradation of dyes under severe conditions.

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Effect of sintering temperature and thermoelectric power studies of the system MgFe2−xCrxO4

Cited by 10 publications

References 17 publications

High-Temperature Thermoelectric Power Studies of Ni-Mg Ferrites

High-Temperature Thermoelectric Power Studies of Ni-Mg Ferrites

Synthesis and Antimicrobial Study of Co-Ni-Cd Nanoferrites

Photocatalytic performance of fine particles of Cr doped magnesium ferrites prepared by sol–gel combustion route

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