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首页> 外文期刊>Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems >Synthesis of calcium metastannate (CaSnO3) by solid state reactions in mechanically activated mixtures calcium citrate tetra hydrate [Ca-3(C6H5O7)(2)center dot 4H(2)O] - tin(II) oxalate (SnC2O4)
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Synthesis of calcium metastannate (CaSnO3) by solid state reactions in mechanically activated mixtures calcium citrate tetra hydrate [Ca-3(C6H5O7)(2)center dot 4H(2)O] - tin(II) oxalate (SnC2O4)

机译:机械活化混合物柠檬酸钙四水合物[Ca-3(C6H5O7)(2)中心点4H(2)O]-草酸锡(II)的固态反应通过固态反应合成偏锡酸钙(CaSnO3)

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摘要

Many synthesis procedures have been worked out to prepare CaSnO3. A great deal of them resort to the classical ceramic method that implies a very high temperature treatment (1300-1500 degrees C) of the component oxides mixture. To avoid such high temperature treatment, many alternative routes have been proposed. In this paper stoichiometric mixtures of Ca citrate tetrahydrate and Sn(II) oxalate have been mechanically activated by high energy milling. The reactions taking place in the mixtures during annealing have been studied by coupled TG-DSC measurements, XRPD and diffuse reflectance FT-IR spectroscopy. It has been established that the stage of mechanical activation allows the synthesis to be completed by 3 h-annealing at 850 degrees C. (C) 2015 Elsevier B.V. All rights reserved.
机译:已经制定出许多合成程序来制备CaSnO3。他们中的许多人诉诸于经典的陶瓷方法,这意味着对成分氧化物混合物进行非常高温的处理(1300-1500摄氏度)。为了避免这种高温处理,已经提出了许多替代路线。在本文中,柠檬酸钙四水合物和草酸亚锡(II)的化学计量混合物已通过高能研磨进行了机械活化。通过耦合TG-DSC测量,XRPD和漫反射FT-IR光谱研究了混合物在退火过程中发生的反应。已经确定,机械活化的阶段允许通过在850摄氏度下进行3 h退火来完成合成。(C)2015 Elsevier B.V.保留所有权利。

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