Studies of the relative acidities of some chloride melts

被引：9
作者：
Cherginets, VL [1 ]
Rebrova, TP [1 ]
机构：
[1] Natl Acad Sci Ukraine, Inst Single Crystals, UA-61001 Kharkov, Ukraine
来源：
ELECTROCHIMICA ACTA | 2000年 / 46卷 / 01期
关键词：
alkaline earth chlorides; melts; oxobasicity index; solubility product; potentiometry; membrane oxygen electrode;
D O I：
10.1016/S0013-4686(00)00566-1
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A potentiometric titration method was used to determine the solubility products (pP = - log P) of some oxides at 700 degreesC in molten chloride mixtures of the following compositions, CaCl2-KCl (0.235:0.765); SrCl2-KCl-NaCl (0.22:0.42:0.36); BaCl2-KCl-NaCl (0.43:0.29:0.28); and BaCl2-KCl (0.26:0.74). On the basis of the solubility data, oxobasicity indices of the above melts were estimated as 4.05, 1.95, 2.01 and 1.83, respectively. The CaCl2-based melt possesses the upper limit of oxobasicity at pO similar to 1.3 caused by the precipitation of CaO. The features of calibration plots E-pO in the studied melts are discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：25 / 30
页数：6
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