Preparation, characterization and dielectric behaviour of some yttrium doped strontium stannates

Bajpai, P. K.; Ratre, Kuldeep; Pastor, Mukul; Sinha, T. P.

doi:10.1007/bf02707341

Cited by 21 publications

(10 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to modify suitably the properties of ASnO 3 (A = Ba, Sr) many substitutions have been carried out at A and Sn sites (Trari et al 1994;Parkash et al 1996;Thangadurai et al 2002;Bajpai et al 2003;Kumar et al 2005;Upadhyay et al 2007). Kumar et al (2006) studied the effect of microstructure on the properties of Sr substituted BaSnO 3 synthesized ceramic method.…”

Section: Introductionmentioning

confidence: 99%

Low temperature synthesis of Ba1−x Sr x SnO3 (x = 0–1) from molten alkali hydroxide flux

Ramdas

Vijayaraghavan

2010

Bull Mater Sci

View full text Add to dashboard Cite

Perovskite structured stannates (Ba 1-x Sr x SnO 3 , x = 0⋅0-1⋅0) powders have been synthesized for the first time by molten salt synthesis (MSS) method using KOH as the flux at lower temperature (400°C) compared to other methods. The phase formation was confirmed by FT-IR spectroscopy, powder X-ray diffraction (XRD) and the microstructure was analysed by scanning electron microscopy. XRD patterns reveal the formation of single phasic products for parent and substituted products with good crystallinity throughout the range (x = 0⋅0-1⋅0). The morphology of the particles of BaSnO 3 and SrSnO 3 is spherical and rod shaped, respectively. Effect of soaking periods on the grain growth is observed clearly in SrSnO 3 . Ba 0⋅5 Sr 0⋅5 SnO 3 (BSS5) crystallizes in flake like morphology.

show abstract

Section: Introductionmentioning

confidence: 99%

Low temperature synthesis of Ba1−x Sr x SnO3 (x = 0–1) from molten alkali hydroxide flux

Ramdas

Vijayaraghavan

2010

Bull Mater Sci

View full text Add to dashboard Cite

show abstract

“…Materials Sciences and Applications, 9, 92-110. Materials Sciences and Applications ing the general chemical formula MSnO 3 (M = Ca, Ba, Sr) and has been studied widely due to their potential applications in the field of thermally stable capacitors, photo catalyst, chemiresistive sensor materials for toxic and noxious gases [1]- [6]. It stabilizes in cubic perovskite structure at room temperature (space group Pm-3 m) with lattice parameter slightly varying from 0.4117 -0.4119 nm depending upon the method of synthesis used [7] [8] [9] [10], and behaves like n-type semiconductor with an optical band gap reported from 3.1 -3.4 eV [11] [12] [13] [14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, Optical and Transport Properties of BaSnO<SUB>3</SUB> Synthesized by Wet Chemical Route

Kurre¹,

Bajpai²,

Bajpai³

2018

MSA

View full text Add to dashboard Cite

Alkaline earth stannates have renewed attention as potential materials for gas sensing, transparent conducting oxides and ceramic capacitor applications. A noble wet chemical route is chosen to synthesize BaSnO 3 powders having micron size grains. Problems related to uneven grains and poor densification in conventional solid state route have been overcome in the present method. X-ray diffraction data confirms the single phase formation without any secondary phase having cubic perovskite structure (S.G. Pm-3 m). The estimated lattice parameter is ≈4.11933 Ǻ and percentage density is ≈90%. The microstructure probed by scanning electron micrograph reveals almost homogeneously distributed particles having random shape with some porosity. Phonon modes in FT-IR and Raman spectra confirm the local symmetry distortion. The DC conductivity at 200˚C approaches almost 2 × 10 −2 (Ω-cm) −1 , which is almost of the same order as that observed in perovskite based electronic conductors. DC and a.c. electrical conductivity of the material follow Mott's variable range hopping at low temperature and Arrhenius type thermally activated process at elevated temperatures. Evidence of small polar on formation is also verified. Optical band gap estimated from absorption data is ≈2.94 very close to the reported value. Composition prepared through the noble wet chemical route has high electrical conduction and suitable for gas sensing applications.

show abstract

“…The synthesis of BaSnO 3 is complicated by the need of hard reaction conditions for the formation of perovskite structure. Conventionally obtained by solid-state calcination at T > 1200 °C highly crystalline barium stannate was extensively investigated for good dielectric properties with potential use in capacitors [23,24]. With the development of wet-chemistry synthetic routes under mild conditions, e.g., hydrothermal [25,26,27,28] and lyothermal [29], ion exchange [30], coprecipitation [31] or polymerized complex methods [11,32], BaSnO 3 was found advantageous for other applications.…”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline BaSnO3 as an Alternative Gas Sensor Material: Surface Reactivity and High Sensitivity to SO2

et al. 2015

View full text Add to dashboard Cite

Nanocrystalline perovskite-type BaSnO3 was obtained via microwave-assisted hydrothermal route followed by annealing at variable temperature. The samples composition and microstructure were characterized. Particle size of 18–23 nm was unaffected by heat treatment at 275–700 °C. Materials DC-conduction was measured at variable temperature and oxygen concentration. Barium stannate exhibited n-type semiconductor behavior at 150–450 °C with activation energy being dependent on the materials annealing temperature. Predominant ionosorbed oxygen species types were estimated. They were shown to change from molecular to atomic species on increasing temperature. Comparative test of sensor response to various inorganic target gases was performed using nanocrystalline SnO2-based sensors as reference ones. Despite one order of magnitude smaller surface area, BaSnO3 displayed higher sensitivity to SO2 in comparison with SnO2. DRIFT spectroscopy revealed distinct interaction routes of the oxides surfaces with SO2. Barium-promoted sulfate formation favoring target molecules oxidation was found responsible for the increased BaSnO3 sensitivity to ppm-range concentrations of SO2 in air.

show abstract

Preparation, characterization and dielectric behaviour of some yttrium doped strontium stannates

Cited by 21 publications

References 3 publications

Low temperature synthesis of Ba1−x Sr x SnO3 (x = 0–1) from molten alkali hydroxide flux

Low temperature synthesis of Ba1−x Sr x SnO3 (x = 0–1) from molten alkali hydroxide flux

Synthesis, Characterization, Optical and Transport Properties of BaSnO<SUB>3</SUB> Synthesized by Wet Chemical Route

Nanocrystalline BaSnO3 as an Alternative Gas Sensor Material: Surface Reactivity and High Sensitivity to SO2

Contact Info

Product

Resources

About

Preparation, characterization and dielectric behaviour of some yttrium doped strontium stannates

Cited by 21 publications

References 3 publications

Low temperature synthesis of Ba1−x Sr x SnO3 (x = 0–1) from molten alkali hydroxide flux

Low temperature synthesis of Ba1−x Sr x SnO3 (x = 0–1) from molten alkali hydroxide flux

Synthesis, Characterization, Optical and Transport Properties of BaSnO&lt;SUB&gt;3&lt;/SUB&gt; Synthesized by Wet Chemical Route

Nanocrystalline BaSnO3 as an Alternative Gas Sensor Material: Surface Reactivity and High Sensitivity to SO2

Contact Info

Product

Resources

About

Synthesis, Characterization, Optical and Transport Properties of BaSnO<SUB>3</SUB> Synthesized by Wet Chemical Route