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物理学报. 1985, 34(4): 562-566.
doi: 10.7498/aps.34.562.
BaB2O4-K2O和BaB2O4-K2B2O4赝二元系相图的研究
- 收稿日期: 1984-03-27
- 刊出日期: 1985-02-05
摘要: 用X射线衍射和差热分析方法研究了BaB2O4-K2O和BaB2O4-K2B2O4赝二元系的相平衡关系。BaB2O4-K2B2O4属共晶体系,共晶温度为850±3℃,共晶点成分为45mol％K2O。在Ba
English Abstract
STUDIES ON PHASE EQUILIBRIUM RELATION IN PSEUDO-BINARY SYSTEMS BaB2O4-K2O AND BaB2O4-K2B2O4
- Received Date:
27 March 1984
- Published Online:
05 February 1985
Abstract: The pseudo-binary systems BaB2O4-K2O and BaB2O4-K2B2O4 have been studies by means of X-ray diffraction and thermal analysis. The system BaB2O4-K3B2O4 is a eutectic one with eutectic temperature at 850±3℃ and the eutectic composition of 45 mol% K2B2O4. In BaB2-K2O system there exist two new compounds. A new compound 5BaB2O4·3K2O melts congruently at 903±3℃. The BaB2O4-5BaB2O4 ·3K2O forms a eutetic system. Its eutetic reaction occurs at 813±3℃ and 25 mol% K2O. Another new compound Ba4K6B8O19 melts incongruently at 860±3℃. The Ba4K6B8O19-K2O also forms a eutectic system. Its eutectic reaction occurs at about 788±3℃ and 67.5 mol% K2O.
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