Low temperature molten-salt synthesis of nanocrystalline cubic Sr2SbMnO6

Baral, Antara; Varma, K. B. R.

doi:10.1016/j.jssc.2009.09.006

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…The dissolution rates of the precursors can be controlled by following the solubility rules given by the Lux-Flood and HSAB theories. These guidelines have been the driving force for the growth of mixed-metal oxide nanocrystals, such as Cu 2 Nb 8 O 21 , 15 ATiO 3 (A = Sr, Ba, Pb), 13,[78][79][80][81][82] ANbO 3 (A = Li, Na, K), [83][84][85] LaMnO 3 , 78 BaTi 2 O 5 , 86 Sr 2 SbMnO 6 , 87 and for several Li-ion battery materials. 59,[88][89][90][91] In all cases, the initial size and morphology of the less soluble metal-oxide precursors (e.g., TiO 2 , Nb 2 O 5 ) have largely determined the morphology and nanoscale dimensions of the desired This journal is © The Royal Society of Chemistry 2015 products, such as nanoparticulate rods, spheres, cubes, platelets, and wires.…”

Section: Flux Synthesis Of Metal-oxide Nanoparticlesmentioning

confidence: 99%

Flux-mediated crystal growth of metal oxides: synthetic tunability of particle morphologies, sizes, and surface features for photocatalysis research

2015

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Molten-salt reactions can be used to prepare single-crystal metal-oxide particles with morphologies and sizes that can be varied from the nanoscale to the microscale, subsequently enabling a growing number of novel investigations into their photocatalytic activities. Crystal growth using flux-mediated methods facilitates finer synthetic manipulation over particle characteristics. The synthetic flexibility that flux synthesis affords for the growth of metaloxides has led to the stabilization of phases limited stability, the discovery of new compositions, and access to alternate crystal morphologies and sizes that exhibit significant changes in photocatalytic activities at their surfaces, such as for the reduction of water to hydrogen in aqueous solutions. This approach has significantly impacted the current understanding of the optical and photocatalytic properties of metal-oxides, such as the dependence of band gap energies on the structure and chemical composition (i.e., obtained from flux-mediated ionexchange reactions). Thus, flux preparations of metal-oxide photocatalysts assist in the growth 2 and optimization of their particles in order to understand and tune the photocatalytic reaction rates at their surfaces.

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Section: Flux Synthesis Of Metal-oxide Nanoparticlesmentioning

confidence: 99%

Flux-mediated crystal growth of metal oxides: synthetic tunability of particle morphologies, sizes, and surface features for photocatalysis research

2015

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“…Furthermore, it has been reported that the crystal structure is tetragonal within the temperature range of 2 to 750 K (s. g. I4/m) and cubic above 750 K (s. g. Fm-3m) (Baral & Varma, 2009;Ivanov, et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Evolution of the structural ordering of the Sr2SbMnO6 perovskite as a function of temperature

Parada

Parra

Caicedo

et al. 2018

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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El material cerámico policristalino Sr2SbMnO6 se sintetizó mediante el método convencional de reacción en estado sólido. La ruta de síntesis usada difirió de otras reportadas en la literatura en que se usó SrO en lugar de SrCO3 como precursor del Sr. Los patrones de difracción de rayos X obtenidos a temperaturas entre 25 y 1.400 °C se estudiaron mediante el método de refinamiento de Rietveld con el programa Generalized Structure Analysis System (GSAS). Los resultados revelaron que la estructura era tetragonal con el grupo espacial P4/mnc a temperaturas entre los 100 y los 600 °C, y cambió a una estructura cúbica con el grupo espacial Fm-3m a temperaturas entre los 800 y los 1.000 °C. Se discute, asimismo, la dependencia del parámetro de red en función de la temperatura. El estudio de este material es importante dadas sus propiedades multiferróicas. © 2018. Acad. Colomb. Cienc. Ex. Fis. Nat.

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“…The temperature of mixture of the slurry was raised to 900 • C and maintained at this temperature for 10 h. Subsequently, the salts were ultrasonically washed using hot distilled water for several times to ensure that the filtrate was free from sulphate ions as confirmed by barium nitrate test. The obtained powders were fully dried at 120 • C for 5 h. The full details pertaining to the synthesis of SSM nanocrystalline powders are reported elsewhere (Baral and Varma 2009). …”

Section: Synthesismentioning

confidence: 99%

Dielectric relaxation behaviour of Sr 2 SbMnO 6 ceramics fabricated from nanocrystalline powders prepared by molten salt synthesis

2011

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Double perovskite polycrystalline single phase and dense Sr 2 SbMnO 6 (SSM) ceramics, fabricated using the nanocrystalline powders synthesized by molten salt method, exhibited high dielectric constant with low dielectric loss as compared to that of SSM ceramics obtained from the powders prepared by solid-state synthesis method. The dielectric data obtained over a wide frequency (100 Hz-1 MHz) and temperature (190 K-300 K) ranges exhibited distinct relaxations owing to both the grain and grain boundary. The dielectric dispersion was modeled using the Cole-Cole equation consisting of two separate relaxation terms corresponding to the grain and grain boundary. The grain and grain boundary relaxations observed in the Nyquist plots (Z and Z ) were modeled by an equivalent circuit consisting of two parallel RC circuits connected in series with each other. A careful analysis of both the impedance (Z vs ω ω ω) and modulus (M vs ω ω ω) behaviour corroborated the conclusions drawn from the dielectric data.

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Low temperature molten-salt synthesis of nanocrystalline cubic Sr2SbMnO6

Cited by 7 publications

References 16 publications

Flux-mediated crystal growth of metal oxides: synthetic tunability of particle morphologies, sizes, and surface features for photocatalysis research

Flux-mediated crystal growth of metal oxides: synthetic tunability of particle morphologies, sizes, and surface features for photocatalysis research

Evolution of the structural ordering of the Sr2SbMnO6 perovskite as a function of temperature

Dielectric relaxation behaviour of Sr 2 SbMnO 6 ceramics fabricated from nanocrystalline powders prepared by molten salt synthesis

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