Synthesis of SrBi2Ta2O9 by solution combustion and its characterization

Oliveira, Felipe Fernandes de; Dalt, Silvana Da; Sousa, Vânia Caldas de; Bergmann, Carlos Pérez

doi:10.1016/j.powtec.2012.04.023

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…The results obtained in this study suggest that the temperature 1050 °C promotes the reaction between Sr(NO 3 ) 2 , Bi(NO) 3 and Nb 2 O 5 -oxalate forming the phase SrBi 2 Nb 2 O 9 . Thus, at 500 °C the oxalate group persist in powder, which is confirmed by examining by infrared transmission (FTIR) [15]. The total absence of the oxalate was attained at higher temperatures greater than 800 °C.…”

Section: Resultsmentioning

confidence: 59%

Morphology control of SrBi2Nb2O9 prepared by a modified chemical method

et al. 2019

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SrBi 2 NbO 9 compounds were prepared through three methods: oxalate coprecipitation, molten salt synthesis and polymerizable complex. The effect of the molecular precursor route has also been investigated. For oxalate co-precipitation method, a solution obtained from acid oxalate, niobium oxide, bismuth nitrate and strontium nitrate are precipitated by ammoniac solution. Then, the precipitated sample is calcined at 1100 °C. A methanol-citric acid solution of solution of NbCl 5 , ethylene glycol, bismuth and strontium nitrates were used as precursors. A black powder ash was crystallized by heat-treating at 1100 °C. Molten salt technique using oxides and carbonate as starting materials and NaCl and KCl to form a reaction medium. The formation temperature was at 1110 °C. Multiple characterizations mainly X-ray diffraction, Fourier transformed infrared spectroscopy and scanning electron microscopy (SEM) measurements have provided to validate the structural feature. Careful, X-ray diffraction analysis showed the presence of two-layered Aurivillius structure. The crystallite size is discussed by Scherrer and Williamson-Hall approaches. SEM images of SrBi 2 NbO 9 ceramics showed plate-like, polygonal and structureless morphologies obtained at different synthesis conditions. Whatever the synthesis process, there is no change on the band of infrared spectra.

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Section: Resultsmentioning

confidence: 59%

Morphology control of SrBi2Nb2O9 prepared by a modified chemical method

et al. 2019

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“…It can be seen that the calcinations of the powders at 700 °C and 6 h increase the sizes of the crystallites. Figure 3 presents the FESEM micrographs of the ZnCr 2 O 4 obtained by solution combustion with the fuels glycine, urea, and citric acid, which reveal agglomerated, porous, and sponge-like morphologies of the particles, these characteristics are reported in the scientific literature for the solution combustion synthesis 20,21 , this is due to evolution of the large amount of gaseous products during combustion, which produces highly porous voluminous powders, and these parameters dependent of fuel used in the synthesis. The glycine shows higher porous than urea and citric acid, however, it is important to note that the samples shows agglomeration of nanoparticles, but the urea shows nanometric crystals of octahedral shape of size bigger than the glycine and citric acid, which is consistent with the values calculate from XRD patterns by Scherrer equation.…”

Section: Characterization Methodsmentioning

confidence: 81%

Effect of the Fuels Glycine, Urea and Citric Acid on Synthesis of the Ceramic Pigment ZnCr2O4 by Solution Combustion

2015

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“…3 SBT is usually obtained through the mixture of oxides, Bi 2 O 3 , Ta 2 O 5 and SrCO 3 , which gives large particles and requires high temperatures for the synthesis of this compound. 4 Other methods used for the synthesis of SrBi 2 Ta 2 O 9 ceramic powder are: the sol-gel method, 5 chemical routes, 6 solution combustion technique, 7 and hydrothermal process. 8 A study of many ceramics of the same chemical compound, but synthesized under different conditions, might reveal trends in the crystallite size, which in turn can be related to the properties of the product.…”

Section: Aurivillius Phases Have the General Formula (Bi 2 O 2 )mentioning

confidence: 99%

Co-Precipitation Synthesis and Characterization of SrBi2Ta2O9 Ceramic

Afqir

Tachafine

Fasquelle

et al. 2018

Journal of Elec Materi

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Strontium bismuth tantalate (SrBi 2 Ta 2 O 9 ) was synthesized by a co-precipitation method. The sample was characterized by x-ray powder diffraction patterns (XRD), Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The results of the dielectric properties are reported at room temperature. No secondary phases were found while heating the powder at 850°C and the pure SrBi 2 Ta 2 O 9 phase was formed, as revealed by XRD. The characteristic bands for SrBi 2 Ta 2 O 9 were observed by FTIR at approximately 619 cm À1 and 810 cm À1 . SEM micrographs for the sample displayed thin plate-like grains. The grain size was less than 1 lm and the crystallite size of about 24 nm. Dielectric response at room temperature shows that the SrBi 2 Ta 2 O 9 ceramic has low loss values, and the flattening of the dielectric constant at higher frequencies. The observed Curie temperature is comparable with those reported in the literature.

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Synthesis of SrBi2Ta2O9 by solution combustion and its characterization

Cited by 4 publications

References 17 publications

Morphology control of SrBi2Nb2O9 prepared by a modified chemical method

Morphology control of SrBi2Nb2O9 prepared by a modified chemical method

Effect of the Fuels Glycine, Urea and Citric Acid on Synthesis of the Ceramic Pigment ZnCr2O4 by Solution Combustion

Co-Precipitation Synthesis and Characterization of SrBi2Ta2O9 Ceramic

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