Crystallization regions of the La2Cu2O5 and La1-xSrxCuO2.5- delta phases in the La2O3-SrO-CuO system
Crystallization regions of the La2Cu2O5 and La1-xSrxCuO2.5- delta phases in the La2O3-SrO-CuO system
复制标题
La2O3-SrO-CuO 体系中 La2Cu2O5 和 La1-xSrxCuO2.5- δ 相的结晶区域
DOI：
10.1088/0953-2048/7/8/012
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发表时间：
1994
影响因子：
3.6
通讯作者：
A. V. Kosenko
中科院分区：
文献类型：
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作者：
A. Maljuk;G. Emelchenko;I. Zver’kova;A. V. Kosenko
在La2O3SrO-CuO体系中，La2Cu2O5和La1-xSrxCuO2.5-Delta结晶区被研究过，当La2O3SrO-CuO的摩尔比为1：8时，SrO的浓度在0.0-5.5mol%范围内。结果表明，锶在La2Cu2O5中不溶，该相的晶化范围受熔体中约1mol%的SrO浓度的限制。当熔体中的SrO浓度超过约1%的摩尔分数时，La1-xSrxCuO2.5-Delta相的晶化发生在1050℃以下，La_(1-x)SrxCuO_(2.5)-Delta的溶解度下限为x约=0.05个原子/Fu。如果锶含量较低，则不存在这种化合物。初步建立了CuO、La2Cu2O5、La1-xSrxCuO2.5-delta相和La2-xSrxCuO4-delta相在La2O3SrO-CuO组成三角形上的初晶界。
The La2Cu2O5 and La1-xSrxCuO2.5- delta crystallization regions have been investigated in the system La2O3SrO-CuO at fixed molar ratio La2O3:CuO=1:8 in the range of SrO concentrations from 0.0 to 5.5 mol%. It has been shown that Sr is non-soluble in La2Cu2O5 and the crystallization region of this phase is limited by the SrO concentration in the melt approximately=1 mol%. When the SrO concentration in the melt exceeds approximately=1% mol%, the La1-xSrxCuO2.5- delta phase crystallization takes place below 1050 degrees C. The Sr lower solubility limit in La1-xSrxCuO2.5- delta is found to be x approximately=0.05 atoms/FU. This compound does not exist if the Sr content is lower. The tentative projections of the primary crystallization phase boundaries of CuO, La2Cu2O5, La1-xSrxCuO2.5- delta and La2-xSrxCuO4- delta phases on the La2O3SrO-CuO composition triangles have been constructed.