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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Study on thermal properties of nanocrystalline strontianite
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Study on thermal properties of nanocrystalline strontianite

机译：纳米晶锶矿的热性能研究

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摘要

Nanocrystalline strontianite (nano-SrCO_3) was synthesized by a simple co-precipitation method. The crystal phase and grain size analyses were performed by X-ray diffraction (XRD) and transmission electron microscope (TEM). The thermal properties of nano-strontianite and reference strontianite were investigated using the thermogravimetry (TG), differential thermal analysis (DTA), and high-temperature XRD. The results of TG and DTA revealed that the phase transition and decomposition temperatures of nano-SrCO_3 were lower than those of the reference SrCO_3. It was also observed that the high-temperature XRD result was in accordance with the TG/DTA measurement. This phenomenon was mainly attributed to the high surface energy of nanomaterials, in which a large number of dangling bonds were present. Consequently, a lower temperature (energy) was sufficient for the phase transition or decomposition of nano-SrCO_3.
机译：通过简单的共沉淀法合成了纳米晶锶矿（nano-SrCO_3）。通过X射线衍射（XRD）和透射电子显微镜（TEM）进行晶相和粒度分析。使用热重法（TG），差热分析（​​DTA）和高温XRD研究了纳米锶矿和参比锶矿的热性能。 TG和DTA的结果表明，纳米SrCO_3的相变和分解温度低于参考SrCO_3。还观察到高温XRD结果与TG / DTA测量结果一致。这种现象主要归因于纳米材料的高表面能，其中存在大量的悬空键。因此，较低的温度（能量）足以使纳米SrCO_3发生相变或分解。

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