Structural and dielectric spectroscopy studies of the M-type barium strontium hexaferrite alloys (Ba x Sr1−x Fe12O19)

Pereira, F. M. M.; R., C. A.; Santos, Manoel Roberval Pimentel; Sohn, R. S. T. M.; Freire, Francisco Nivaldo Aguiar; Sasaki, J. M.; Paiva, J. A. C. De; Sombra, A. S. B.

doi:10.1007/s10854-007-9411-5

Cited by 84 publications

(44 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…M-type hexagonal ferrites are known for their strong uniaxial magneto crystalline anisotropy with easy magnetization along c-axis [1][2][3]. MFe 12 O 19 (M = Ba, Sr, Pb) with the magnetoplumbite structure, high Curie temperature, large saturation magnetization, high coercive force, excellent chemical stability and high corrosion resistivity has been considered as magnetic materials used for microwave, small motor and magnetic recording applications [4][5][6]. The application of hexagonal ferrites in the area of magnetic recording requires proper control of homogeneity and morphology.…”

Section: Introductionmentioning

confidence: 99%

Study of structural, morphological and magnetic properties of Ba0.5Sr0.5Fe12O19

Kanagesan

Jesurani

Ramachandran

et al. 2011

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Single-phase barium Strontium hexaferrite (Ba 0.5 Sr 0.5 Fe 12 O 19 -BSF) was synthesized by sol-gel method using metal nitrates as source and D-Fructose as a fuel. The phase formation, surface morphology and magnetic properties of the samples were analyzed by X-ray Diffraction, High-resolution Scanning Electron Microscope (HR-SEM) and Vibrating Sample Magnetometer (VSM). X-ray analysis indicates that the sintered samples were remained in hexagonal structure. The densities of the sintered samples at 1,150°C were found to be 93% of theoretical density. HR-SEM and VSM studies reveal that the sintered samples were resulted in hexagonal structure with good magnetic properties. The average diagonal of the grains varies from 0.95 to 1.7 lm. The thermal treatment effects the growth of the hexagonal grains of ferrites.

show abstract

Section: Introductionmentioning

confidence: 99%

Study of structural, morphological and magnetic properties of Ba0.5Sr0.5Fe12O19

Kanagesan

Jesurani

Ramachandran

et al. 2011

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

show abstract

“…In the FT-IR spectra of all the ferrites annealed at 1000 8C, the frequency bands in the range 550-580 cm À1 and 430-470 cm À1 correspond to the formation of tetrahedral and octahedral clusters, which confirms the presence of M-O stretching band in ferrites [10,11]. The authors suggested that the vibrational mode of tetrahedral clusters is higher as compared to that of octahedral clusters, which is due to the shorter bond length of tetrahedral clusters.…”

Section: Ft-irmentioning

confidence: 75%

A comparative study on the magnetic properties of MFe12O19 and MAlFe11O19 (M=Sr, Ba and Pb) hexaferrites with different morphologies

Singhal

Namgyal

Singh

et al. 2011

Ceramics International

101

View full text Add to dashboard Cite

“…, 460 cm -1 , hasil ini serupa dengan hasil penelitian sebelumnya 585 cm -1 , 546 cm -1 , 440 cm -1 merupakan daerah terdapatnya gugus fungsi Fe-O dan Ba-O [10][11]. Pada daerah ini memiliki nilai transmisi berbanding lurus dengan nilai temperatur kalsinasi.…”

Section: Karakterisasi Barium M-heksaferitunclassified

“…Sampel tanpa kalsinasi terdapat puncak yang sangat besar dan terus mengalami pengurangan nilai transmisi berbanding terbalik dengan nilai temperatur kalsinasi hingga puncak terkecil terdapat pada kalsinasi 800 o C yang menandakan pada kalsinasi 800 o C terdapat air paling sedikit. [10][11]. Pada daerah ini memiliki nilai transmisi berbanding lurus dengan nilai temperatur kalsinasi.…”

Section: Karakterisasi Barium M-heksaferitunclassified

“…Pada daerah ini terdapat ikatan metal oxide [7]. Terdapat puncak pada daerah fingerprint tersebut yaitu tepatnya pada 572 cm -1 mengindika-sikan adanya ikatan Zn-O, terdapat juga puncak pada 530 cm -1 , 475 cm -1 , 460 cm -1 , hasil ini serupa dengan hasil penelitian sebelumnya 585 cm -1 , 546 cm -1 , 440 cm -1 merupakan daerah terdapatnya gugus fungsi Fe-O dan Ba-O [10][11]. Pada daerah ini memiliki nilai transmisi berbanding lurus dengan nilai temperatur kalsinasi.…”

Section: Karakterisasi Barium M-heksaferitunclassified

See 1 more Smart Citation

PENGARUH VARIASI TEMPERATUR KALSINASI TERHADAP BARIUM M-HEKSAFERIT DIDOPING Zn MENGGUNAKAN FOURIER TRANSFORM INFRA RED

Doyan¹,

Halik²,

Susilawati³

2015

J. Pijar MIPA

View full text Add to dashboard Cite

Abstrak: Barium M-heksaferit (BaM) merupakan bahan magnet permanen yang tergolong hardmagnetic tetapi tidak sesuai untuk beberapa aplikasi, sehingga perlu dilakukan rekayasa untuk menurunkan sifat kemagnetannya menjadi softmagnetic. Penelitian ini bertujuan untuk mengetahui pengaruh temperatur kalsinasi terhadap barium M-heksaferit didoping Zn menggunakan pengukuran FTIR. Proses sintesis barium M-heksaferit menggunakan metode kopresipitasi dengan memvariasikan konsentrasi dopannya 0,0; 0,3; 0,6; dan 0,9 serta memvariasikan temperatur kalsinasi 80 o C, 400 o C, 600 o C dan 800 o C. Setelah melakukan proses sintesis selanjutnya dilakukan pengujian sampel menggunakan FTIR (Fourier Transform Infra Red). Penelitian ini telah berhasil melakukan sintesis dengan hasil berupa serbuk barium M-heksaferit berwarna coklat muda hingga coklat tua. Berdasarkan hasil pengujian FTIR didapatkan puncak-puncak pada bilangan gelombang 3447cm, 470cm -1 masing-masing mengindikasikan adanya gugus fungsi O-H, Ba-O, Fe-O dan Zn-O pada sampel. Puncak yang timbul pada ikatan O-H semakin mengecil menandakan bahwa ikatan pada gugus fungsi tersebut semakin melemah atau bahkan hilang. Hasil pengujian FTIR tersebut menyatakan bahwa temperatur kalsinasi sangat berpengaruh pada proses sintesis BaM. Semakin tinggi temperatur kalsinasi, bahan pengotor seperti air dan CO pada barium M-heksaferit semakin berkurang, ini menunjukkan barium M-heksaferit yang dihasilkan dapat digunakan sebagai bahan softmagnetic.Kata Kunci: Barium M-Heksaferite, sintesis, kopresipitasi, magnet, FTIR Abstract: Barium M-hexaferrite (BaM) is a permanent magnetic material which is relatively hardmagnetic but it is not appropriate for some applications that need to be engineered to degrade the nature of magnetism to be softmagnetic. This study aims to determine the effect of calcinations temperature on Zn doped BaM using FTIR measurements. Synthesis of BaM using coprecipitation method by varying the concentrate of dopan 0,0; 0,3; 0,6; dan 0,9 and varying the calcinations temperature 80 o C, 400 o C, 600 o C dan 800 o C. After synthesis of BaM and than the samples were studied using FTIR (Fourier Transform Infra Red). This study has success to synthesis of BaM and the product is a brown powder. Based on the test result of FTIR has been obtained peaks in wave number 3447cm -1 , 2345cm -1 , 1615cm -1 , 530cm -1 , 470cm -1 indicated a functional group O-H, Ba-O, Fe-O dan Zn-O on the powder sample. The peak on O-H shrinking indicates that the bond of functional groups are weakened or even disappear.The result of FTIR said that calcinations temperature has effect to BaM synthesis process. It is found that water and CO decrease with increase in calcinations temperature, it is showed the product BaM can be used to softmagnetic.

show abstract

Structural and dielectric spectroscopy studies of the M-type barium strontium hexaferrite alloys (Ba x Sr1−x Fe12O19)

Cited by 84 publications

References 25 publications

Study of structural, morphological and magnetic properties of Ba0.5Sr0.5Fe12O19

Study of structural, morphological and magnetic properties of Ba0.5Sr0.5Fe12O19

A comparative study on the magnetic properties of MFe12O19 and MAlFe11O19 (M=Sr, Ba and Pb) hexaferrites with different morphologies

PENGARUH VARIASI TEMPERATUR KALSINASI TERHADAP BARIUM M-HEKSAFERIT DIDOPING Zn MENGGUNAKAN FOURIER TRANSFORM INFRA RED

Contact Info

Product

Resources

About