| 五硼酸钾部分高温特性的研究 |
| Some Characteristics of Potassium Pentaborate at High Temperature |
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| 摘要: 研究了高温下水蒸汽及氯化钠或氯化钾对五硼酸钾的影响。借助自行设计的反应器与XRD、Raman光谱分析高温水蒸汽气氛下五硼酸钾的结构变化，证明了无论在其熔融态还是固态都会与水蒸汽发生反应，使产物中的K2O含量升高，B2O3与水结合从五硼酸钾中脱离。利用DTA、XRD分析绘制了KB5O8-MCl（M＝K、Na）体系熔度图，属简单低共熔型，低共熔点分别为xKCl=50%、 742 ℃，xNaCl=20%、 689 ℃。 |
| 关键词: 五硼酸钾 XRD Raman光谱 差热分析 |
| 基金项目: |
| Abstract: The effect of steam, NaCl, or KCl on potassium pentaborate was investigated at high temperature. The structure changes of KB5O8 in high temperature water steam were studied by a self-designed reactor, XRD, and Raman spectroscopy. The reaction between KB5O8 and water steam at solid state and molten state was confirmed. Ratio of B2O3 to K2O in reaction product would be decreased by high temperature steam. The melting diagrams of binary systems KB5O8-MCl（M＝K, Na）were obtained by means of DTA and X-ray diffraction analysis. It is found that KB5O8-MCl（M＝K, Na）systems are of simple eutectic type with eutectic points (xKCl = 50%, 742 ℃ and xNaCl = 20%, 689 ℃), respectively. The addition of NaCl or KCl can not affect the structure of KB5O8. |
| Keywords: Potassium pentaborate Raman spectroscopy XRD DTA |
| 投稿时间：2004-12-16 修订日期：2005-04-20 |
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| 杨刚,李佐虎,张懿.五硼酸钾部分高温特性的研究[J].无机化学学报,2005,21(8):1127-1130. |
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