Fabrication and characterization of nanostructured Ba-doped BiFeO3 porous ceramics

• Autorzy: Mostafavi E. , Ataie A.

Identyfikatory

DOI

10.1515/msp-2016-0017

• Języki publikacji: EN

Abstrakty

EN

Nanostructured barium doped bismuth ferrite, Bi_0.8Ba_0.2FeO₃ porous ceramics with a relatively high magnetic coercivity was fabricated via sacrificial pore former method. X-ray diffraction results showed that 20 wt.% Ba doping induces a structural phase transition from rhombohedral to distorted pseudo-cubic structure in the final por(o)us samples. Moreover, utilizing Bi_0.8Ba_0.2FeO₃ as the starting powder reduces the destructive interactions between the matrix phase and pore former, leading to an increase in stability of bismuth ferrite phase in the final porous ceramics. Urea-derived Bi_0.8Ba_0.2FeO₃ porous ceramic exhibits density of 4.74 g/cm³ and porosity of 45 % owing the uniform distribution of interconnected pores with a mean pore size of 7.5 mu m. Well defined nanostructured cell walls with a mean grain size of 90 nm were observed in the above sample, which is in a good accordance with the grain size obtained from BET measurements. Saturation magnetization decreased from 2.31 in the Bi_0.8Ba_0.2FeO₃ compact sample to 1.85 A.m² /kg in urea-derived Bi_0.8Ba_0.2FeO₃ porous sample; moreover, coercivity increased from 284 to 380 kA/m.

Słowa kluczowe

EN

bismuth ferrite; dopant; nanostructures; porous ceramics; magnetic properties

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2016
• Tom: Vol. 34, No. 1
• Strony: 148--156
• Opis fizyczny: Bibliogr. 43 poz., rys., tab.

Twórcy

autor

Mostafavi E.

• School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O.Box 14395-553, Tehran, Iran

autor

Ataie A.

• School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O.Box 14395-553, Tehran, Iran

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.