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首页> 外文期刊>Advanced Powder Technology: The internation Journal of the Society of Powder Technology, Japan >Synthesis of Tin Oxide Hydrate (SnO2 centre dot xH2O) Gel and its Effects on the Hydrothermal Preparation of BaSnO3 Powders
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Synthesis of Tin Oxide Hydrate (SnO2 centre dot xH2O) Gel and its Effects on the Hydrothermal Preparation of BaSnO3 Powders

机译：水合氧化锡（SnO2中心点xH2O）凝胶的合成及其对水热制备BaSnO3粉末的影响

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摘要

Perovskite-type BaSnO3 powders with a particle size of 30-60 nm have been prepared from tin oxide hydrate (SnO2 centre dot xH2O) gel via the hydrothermal synthesis route.The reactivity of the synthesized SnO2 centre dot xH2O was found to be dependent on the pH value of the mixture of tin chloride and the ammonia solution.The most reactive SnO2 centre dot xH2O gel was obtained at a pH value near 2.The hydrothermal products derived from this reactive gel were characterized with thermograrimetric/differential thermal analysis,Fourier transform infrared spectrometry,X-ray diffraction and high-resolution scanning electron microscopy.The BaSn(OH)6 phase in the as-prepared powder was found to convert into an amorphous phase other than into the BaSnO3 phase.The BaSnO3 powder crystallizing from the amorphous phase at 260°C for 4 h has better sintering properties than the commercial one.
机译：通过水热合成途径由水合氧化锡（SnO2中心点xH2O）凝胶制备了钙钛矿型BaSnO3粉末，其水热合成路线为30-60 nm，发现合成的SnO2中心点xH2O的反应性取决于氯化锡与氨溶液的混合物的pH值。在pH值接近2时获得最具反应性的SnO2中心点xH2O凝胶。通过热重/差热分析，傅立叶红外光谱分析了该反应性凝胶衍生的水热产物。分光光度法，X射线衍射和高分辨率扫描电镜观察。发现所制备粉末中的BaSn（OH）6相转化为除BaSnO3相以外的非晶相。BaSnO3粉末从非晶相结晶在260°C下加热4小时，其烧结性能要比市售的更好。

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