Structural investigations of (Ca,Sr)ZrO3 and Ca(Sn,Zr)O3 perovskite compounds

Tarrida, Martine; Larguem, H.; Madon, M.

doi:10.1007/s00269-008-0286-7

Cited by 72 publications

(58 citation statements)

References 18 publications

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“…In the present work such bands were observed at 664 cm -1 and 549 cm -1 , for sample SNCL and at 671 cm -1 and 547 cm -1 for SN sample. In the SNCL sample infrared spectrum the bands at 1466 cm -1 , 1066 cm -1 and 860 cm -1 were attributed to vibration of carbonate groups [26]. For the infrared spectrum of the SN sample, these bands were observed at 1452 cm -1 and 871 cm -1 , with a markedly smaller intensity.…”

Section: Resultsmentioning

confidence: 91%

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New methodology for a faster synthesis of SrSnO3 by the modified Pechini method

et al. 2013

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SrSnO 3 , a perovskite-type complex oxide, was synthesized by the modified Pechini method using two different precursors, tin chloride and metallic tin. The first one is already traditional in the literature and it claims about 30 days, only for the cleaning of tin citrate aiming at the elimination of the chloride. The second route was developed by our research group and saves time, taking 6 h to complete the synthesis of the resin. The results show that SrSnO 3 obtained from the metallic tin show a higher short range order, leading to a band gap value higher than those reported in the literature, besides a meaningful reduction in the formation of SrCO 3 , as compared to the one obtained from tin chloride. Keywords: perovskite, stannate, chemical synthesis. Resumo

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Section: Resultsmentioning

confidence: 91%

“…3 illustrates the Raman spectra, at the 100-1000 cm -1 region, for the SrSnO 3 samples while the attributions of the bands are presented in Table I. The broad and weak bands at higher frequencies can be attributed to second-order scatterings resulting of the superposition of different combinations of modes [25][26][27].…”

Section: Resultsmentioning

confidence: 99%

New methodology for a faster synthesis of SrSnO3 by the modified Pechini method

et al. 2013

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“…The unit cell parameters for the three materials were obtained by Rietveld refinement using previous reported structural models for the three materials [28,56]. The grain size of the materials was evaluated by linear intercept method, from 50 to 60 grains from the SEM images.…”

Section: Sample Preparationmentioning

confidence: 99%

96Zr Tracer Diffusion in AZrO3 (A = Ca, Sr, Ba)

et al. 2018

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Cation tracer diffusion in polycrystalline AZrO 3 (A = Ca, Sr, Ba) perovskites was studied at 1300-1500 • C in air using the stable isotope 96 Zr. Thin films of 96 ZrO 2 were deposited on polished ceramic pellets by drop casting of an aqueous precursor solution containing the tracer. The pellets were subjected to thermal annealing, and the isotope depth profiles were measured by secondary ion mass spectrometry. Two distinct regions with different slopes in the profiles enabled to assess separately the lattice and grain boundary diffusion coefficients using Fick's second law and Whipple-Le Clair's equation. The cation diffusion along grain boundaries was 4-5 orders of magnitude faster than the corresponding lattice diffusion. The magnitude of the diffusivity of Zr 4+ was observed to increase with decreasing size of the A-cation in AZrO 3 , while the activation energy for the diffusion was comparable 435 ± 67, 505 ± 56, and 445 ± 45 and kJ·mol −1 for BaZrO 3 , SrZrO 3 , and CaZrO 3 , respectively. Several diffusion mechanisms for Zr 4+ were considered, including paths via Zr-and A-site vacancies. The Zr 4+ diffusion coefficients reported here were compared to previous data reported on B-site diffusion in perovskites, and Zr 4+ diffusion in fluorite-type compounds.

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“…The bands located at 161, 181, 276 and 354 cm -1 were assigned to Ca-SnO 3 and O-Sn-O vibrations [30]. The bands at 441, 583 and 701 cm -1 were related to the torsional and stretching modes of SnO 3 and Sn-O, respectively [30,32,35]. The modes at 1079 and 1092 cm -1 were assigned to calcium carbonate vibrations [36].…”

Section: Characterization Of the Materialsmentioning

confidence: 99%

CaSnO 3 obtained by modified Pechini method applied in the photocatalytic degradation of an azo dye

et al. 2017

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Pure forms of alkaline-earth stannates with perovskite structure (ASnO 3 , A= Ca ) have been used as photocatalysts. In this work, CaSnO 3 perovskite sample was synthesized by a modified Pechini method at 800 ºC and characterized by X-ray diffraction (XRD), UV-visible spectroscopy, infrared spectroscopy and Raman spectroscopy. The photocatalytic degradation of remazol golden yellow (RNL) dye under UV radiation was evaluated. The XRD pattern showed that the synthesis method favored the orthorhombic CaSnO 3 crystallization. According to the Raman spectrum, a material with high short-range order was obtained despite of the relatively low synthesis temperature, compared to the solid-state reaction one. The highest photocatalytic activity was attained at pH 3, which presented 51% discoloration and improved activity of 35% compared to discoloration solely due to adsorption (absence of radiation). The point of zero charge (PZC) and the photocatalytic results indicated that a direct mechanism prevailed at pH 3, whereas an indirect mechanism prevailed at pH 6.

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Structural investigations of (Ca,Sr)ZrO3 and Ca(Sn,Zr)O3 perovskite compounds

Cited by 72 publications

References 18 publications

New methodology for a faster synthesis of SrSnO3 by the modified Pechini method

New methodology for a faster synthesis of SrSnO3 by the modified Pechini method

96Zr Tracer Diffusion in AZrO3 (A = Ca, Sr, Ba)

CaSnO 3 obtained by modified Pechini method applied in the photocatalytic degradation of an azo dye

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