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在La_2O_3—BeO二元系中有La_2O_3·2BeO和3La_2O_3·2BeO两个化合物,其他三价希土氧化物——氧化铍的化合物则尚未见诸文献报导。Тресвятский等由高温热分析法作出的Gd_2O_3—BeO系统的相图为简单共熔二元系,未发现有任何形式的中间化合物。然而在他们作出的相图上,共熔点已低于氧化铍熔点1000℃以上,可设想熔体中有铍氧复合离子生成,如果某种铍氧复合离子能维持至发生结晶作用以后尚有一定的稳定区域,则将出现新化合物。因此,为了探讨三价希土氧化物与氧化铍之间生成的化合物,对于Gd_2O_3—BeO系统的相平衡关系重新作了研究。
In La 2 O 3 -BOO binary system La 2 O 3 · 2BeO and 3La 2 O 3 · 2BeO two compounds, other trivalent rare earth oxide - beryllium oxide compounds have not been reported in the literature. Тресвятский other high-temperature thermal analysis of the Gd_2O_3-BeO phase diagram of the system is simple eutectic binary system, did not find any form of intermediate compounds. However, on the phase diagram they made, the eutectic point is below 1000 ° C above the melting point of beryllium oxide. It is conceivable that beryllium-oxygen complex ions are formed in the melt. If certain beryllium-oxygen complex ions are maintained until the crystallization takes place Of the stable region, then a new compound will appear. Therefore, in order to investigate the compounds formed between trivalent rare earth oxides and beryllium oxide, the phase equilibrium relationship of Gd 2 O 3 -BeO system was studied again.