Characterization of (Co-Mn-Ti) substituted M type barium hexagonal ferrite based microwave absorber at X band

Meshram, M R; Agrawal, N.K.; Sinha, Bharoti; Misra, P.S.

doi:10.1109/isape.2003.1276794

Cited by 3 publications

(5 citation statements)

References 6 publications

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“…Previously, Kagotani et al reported that with the substitution of Fe and Ba with La, Zn and Mn ions, the microwave absorption peaks of barium ferrite varied gradually in the range of frequency from 4 to 16 GHz [17]. Furthermore, Meshram et al [9] also found that by substituted Fe with Co, Ti and Mn ions, themicrowave absorption properties of barium ferrite could significantly improved. The aim of this paper is to investigate the relationship between the magnetic and microwave absorption properties of Barium hexaferrite (BaFe 12 O 19 ) with different sintering temperature and Mn-Ti dopant concentrations.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the demands of development in thinner electromagnetic (EM) wave absorbers with wider absorbing band-widths are increasing [5,6]. The microwave absorber can be used to minimize the EM reflection from metal plates such as aircraft, ships, tanks and walls of anechoic chambers and electronic equipment [7,8].There are different EM wave absorber materials being used such as ferrites, conducting fibers, ferromagnets, and carbon nanotubes however, ferrites exhibit an interesting behavior [9,8]. Ferrites have been used as absorbing materials in various forms such as sheets, paints, films, ceramic tiles and powders loaded in matrix composites or mixed with conducting materials [11].…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Sintering Temperature and Mn-Ti Doped BaFe12O19 on the Microwave Absorbing Properties

Nasution

Achmad

et al. 2015

AMM

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The effect of sintering temperature and Mn-Ti (x = 0.1 and 0.5 % mol) doped in Barium hexaferrite (BaFe12O19) on the microwave absorption properties have been investigated. The BaFe(12-2x)MnxTixO19samples were prepared by using a solid state reaction method from technical grade materials of BaCO3, Fe2O3, MnO2, and TiO2. The permagraph and vector network analyzer (VNA) measurement with frequency of 4 – 10 GHz were used to determine the magnetic properties and microwave absorbing properties, respectively. The magnetic induction and magnetizing force (B-H) curve analysis of BaFe(12-2x)MnxTixO19revealed that by increasing the Mn-Ti dopant concentrations, the remanence (Br) and BH(max) increases, meanwhile, the HCBvalue decreases for both 1100 and 1150oC. The frequency dependence of reflection loss (RL) measurement given anoptimum value of-26.15 dB at frequency of 9.18 GHz which obtained by x = 0.1% mol Mn-Ti (1100oC). The maximum absorption peak was achieved for 0.5 % mol Mn-Ti sample with ~98.3 % at 9.18 GHz. By controlling the sintering temperature and Mn-Ti dopant concentration, the RL and absorption behavior can be modified to desirable values and also indicates that higher Mn-Ti dopant concentration (0.5% mol) possess better absorbing characteristics. Furthermore, it was found that complex permitivitty and permeability values of BaFe12O19can be modified by controlling the Mn-Ti dopant concentration.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Influence of Sintering Temperature and Mn-Ti Doped BaFe12O19 on the Microwave Absorbing Properties

Nasution

Achmad

et al. 2015

AMM

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“…It is observed that material composition and particle morphology play a major role in absorption behavior. [2,[9][10][11][12][13], but the effect of particle size is still under research and very less attention has been given to observe the effect of particle size on absorption at microwave frequencies. The particle morphology and particle size are influenced by heat treatment [7,8].…”

Section: Introductionmentioning

confidence: 99%

EFFECT OF PARTICLE SIZE OF BaFe12O19 ON THE MICROWAVE ABSORPTION CHARACTERISTICS IN X-BAND

Kumar¹,

Agarwala²,

Singh³

2013

PIER M

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Abstract-Present work deals with the microwave absorption characteristics of BaFe 12 O 19 of interest as radar absorbing material (RAM). There are very few reported works available where particle size has been critically analyzed for absorbing characteristics at microwave frequencies, therefore, in this paper microwave absorption properties of the BaFe 12 O 19 with different particle sizes were investigated. The results showed that the particle size had significant influence on the dielectric and absorption properties of the composites in the 8.2-12.4 GHz frequency range. BaFe 12 O 19 powder of different particle sizes were synthesized by varying the annealing time and it was observed that the real part of permittivity of the composite increases from 5.18 (average value) to 7.50 (average value) and imaginary part increases from an average value of 0.20 to an average value of 2.33, whereas the real part of permeability increases from 0.95 (average value) to 1.11 (average value) and imaginary part of permeability was measured in the range of 0.02 to 0.07. These changes in permittivity and permeability affects microwave absorption application. It is observed that the maximum bandwidth for average particle size of 240 nm is 3.02 GHz and with the increase in average particle size, microwave absorption properties increased.

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“…As ferritas constituem uma classe muito importante de materiais magnéticos, por conterem íons magnéticos arranjados, que podem gerar magnetização espontânea, enquanto mantêm boas propriedades dielétricas. Ferritas são usualmente obtidas por síntese estequiométrica de misturas de certos óxidos metálicos em altas temperaturas (1000 a 1500°C) (Von Aulock, 1965;Meshram et al, 2003e Ribeiro, 2006.…”

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“…A interação dos momentos magnéticos induzidos por um campo magnético externo aplicado resulta nas propriedades magnéticas macroscópicas dos materiais (Paulo, 2006). A soma desses momentos dá o momento magnético do átomo (Nedlov, Milenova e Dishivsky, 1994;Meshram et al, 2003;Nohara, 2003).…”

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Comportamento eletromagnético de materiais absorvedores de micro-ondas baseados em hexaferrita de Ca modificada com íons CoTi e dopada com La

Silva¹,

Pereira²,

Nohara³

et al. 2009

JATM

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Characterization of (Co-Mn-Ti) substituted M type barium hexagonal ferrite based microwave absorber at X band

Cited by 3 publications

References 6 publications

The Influence of Sintering Temperature and Mn-Ti Doped BaFe<sub>12</sub>O<sub>19</sub> on the Microwave Absorbing Properties

The Influence of Sintering Temperature and Mn-Ti Doped BaFe<sub>12</sub>O<sub>19</sub> on the Microwave Absorbing Properties

EFFECT OF PARTICLE SIZE OF BaFe<sub>12</sub>O<sub>19</sub> ON THE MICROWAVE ABSORPTION CHARACTERISTICS IN X-BAND

Comportamento eletromagnético de materiais absorvedores de micro-ondas baseados em hexaferrita de Ca modificada com íons CoTi e dopada com La

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