Effects of precursor chemistry and thermal treatment conditions on obtaining phase pure bismuth ferrite from aqueous gel precursors

Hardy, An; Gielis, Sven; Rul, H. Van den; D’Haen, Jan; Bael, Marlies K. Van; Mullens, J.

doi:10.1016/j.jeurceramsoc.2009.05.018

Cited by 67 publications

(47 citation statements)

References 17 publications

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“…The choice of precursors and amount of organic additives can be important. Hardy et al reported a Pechini-like synthesis where nitrates and citrates were used as precursor (Hardy et al 2009). This combination can lead to a self-combustion of the gel during calcination, in combination with the evaporation of large amounts of decomposition gases, like CO (Hardy et al 2005).…”

Section: Bismuth Ferritementioning

confidence: 99%

Modified Pechini Synthesis of Oxide Powders and Thin Films

Sunde

Grande

Einarsrud

2016

Handbook of Sol-Gel Science and Technology

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The modified Pechini method has become one of the most popular synthesis methods for complex oxide materials due to its simplicity and versatility. The method can be applied to synthesize nano-crystalline powders, bulk materials as well as oxide thin films. Here, we present a comprehensive review of the method with focus on the chemistry through the three stages of the process; preparation of stable aqueous solution, poly-esterification to form a solid polymeric resin and finally decomposition/combustion of the resin to form an amorphous oxide followed by crystallization of the desired oxide phase. The review include

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Section: Bismuth Ferritementioning

confidence: 99%

Modified Pechini Synthesis of Oxide Powders and Thin Films

Sunde

Grande

Einarsrud

2016

Handbook of Sol-Gel Science and Technology

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“…To obtain nano-crystalline powders with high homogeneity and uniform structure, many techniques have been provided for the synthesis of the BiFeO 3 powders. These methods are coprecipitation [8], hydrothermal [9][10][11][12][13][14], solvothermal [15,16], sonochemical [17], microemulsion [17], polyacrylamide gel [18], ferrioxalate [19], sol-gel [6,[20][21][22][23], combustion synthesis [7,[24][25][26], molten-salt [27][28][29], tartaric acid-assisted gel strategy [30], polymeric precursor [31,32] and mechanochemical synthesis [33]. The chemical co-precipitation method ensures proper distribution of the various metals ions resulting to stoichiometric and smaller particles size product, compared to some of the other procedures.…”

Section: Introductionmentioning

confidence: 99%

Effect of synthesis conditions on the preparation of BiFeO3 nanopowders using two different methods

Rashad

2011

J Mater Sci: Mater Electron

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Bismuth orthoferrite (BiFeO 3 ) nanoparticles have been synthesized via the co-precipitation and the oxalate precursor methods. Effects of Bi source, annealing temperature, Bi/Fe molar ratio, oxalic acid ratio and Mn 2? ion on the crystal structure, crystallite size, microstructure and magnetic properties of the produced powders were systematically studied. The results revealed that bismuth oxychloride and iron oxide were formed using chlorides sources. A single phase of BiFeO 3 was formed from asmade samples with Bi/Fe molar ratio 1.1 using nitrate sources and annealed at 500 and 600°C for 2 h via the two pathways. The pure BiFeO 3 phase appeared as spherical and pseudocubic-like structure using the co-precipitation and the oxalic acid precursor routes, respectively. A high saturation magnetization (3.94 emu/g) was achieved for powder formed from the oxalate precursor route with Bi/Fe molar ratio 1.0 annealed at 600°C for 2 h as the result of the formation of Bi 25 FeO 39 . Moreover, Mn 2? ion addition affected BiFeO 3 properties due to the formation of Bi 2 Fe 2 Mn 2 O 10 . Hence, the saturation magnetization and the coercive force of BiFeO 3 were improved substantially by substitution of Mn 2? ions (BiFe 1-X Mn X O 3 , X = 0.1-0.2).

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“…As a sillenite-type compound, Bi 25 FeO 40 with a 18 band gap of 1.8 eV displayed higher photocatalytic activity 19 [5,6] than perovskite-phase BiFeO 3 which has a band gap of 20 2.2 eV [7,8]. 21 In order to enhance photocatalytic activity, some researchers 22 concentrated on the combination of photocatalyst. Li et al…”

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confidence: 99%