【摘要】 研究了 KF· K2 Ni F6的高温高压法合成及其在高温下的分解性能 .结果表明 ,当温度大于 2 2 5℃、氟气压力大于 2 .0 MPa时 KF和 Ni F2 的混合物可迅速与 F2 反应 ,红外光谱及拉曼光谱研究证明反应产物为 KF· K2 Ni F6;约 2 50℃时 ,KF·K2 Ni F6将分解放出氟气 ,分解压力在 350℃时超过 62 0 k Pa、氟气纯度达到 99%以上 .KF· K2 Ni F6可以用作氟气发生器中的氟气源更多还原

【Abstract】 The synthesis of potassium hexafluoronickelate(Ⅳ) on the condition of high temperature and high pressure and its decomposition at high temperature have been studied. The result showed that fluorine gas can be quickly absorbed by a mixture of potassium fluoride and nickel fluoride at temperature above 225 ℃ and pressure of about 2 0 MPa. The FT IR spectra and Raman spectra verified the formation of potassium hexafluoronickelate(Ⅳ). When the temperature is raised to 250 ℃, potassium hexafluoronickelate(Ⅳ) will be decomposed to produce fluorine gas with a pressure reaching to 620 kPa at 350 ℃. The purity of fluorine is higher than 99%. It is suggested that potassium hexafluoronickelate(Ⅳ) can be used as a fluorine source.更多还原