Abstract

The thermal decomposition process of (NH₄)₃ZrF₇ at temperature ≥360°C in air was analyzed using scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) and X-ray powder diffraction. The results show that (NH₄)₃ZrF₇ decomposes sequentially in air at 360°C through a several-step: (NH₄)₃ZrF₇ → (NH₄)₂ZrF₆ → NH₄ZrF₅ → NH₄ZrF₉. Then Zr(F, O)_2.706 forms due to the hydrolysis of NH₄Zr₂F₉. While at temperature ≥ 400°C in air, ZrF₄ with minor zirconium oxyfluoride quickly forms in a short time.

中文翻译：

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七氟锆酸铵在空气中的热分解

摘要

_{(NH 4} ) ₃ ZrF ₇在温度≥360°C 的空气中的热分解过程使用扫描电子显微镜与能量色散X 射线光谱(SEM-EDS) 和X 射线粉末衍射进行了分析。结果表明，(NH ₄ ) ₃ ZrF ₇在360℃空气中经过几个步骤依次分解：(NH ₄ ) ₃ ZrF ₇ → (NH ₄ ) ₂ ZrF ₆ → NH ₄ ZrF ₅ → NH ₄ ZrF ₉ . 然后由于 NH 的水解形成Zr(F,O) _2.7064锆₂ F ₉。而在空气中 ≥ 400°C 的温度下，带有少量氟氧化锆的 ZrF ₄会在短时间内迅速形成。