Solubility of Cr2O3 and Speciation of Chromium in Soda-Lime-Silicate Melts

被引：27

作者：

Khedim, Hichem ^{[1
]}

Katrina, Tuti ^{[1
]}

Podor, Renaud ^{[2
]}

Panteix, Pierre-Jean ^{[1
]}

Rapin, Christophe ^{[1
]}

Vilasi, Michel ^{[1
]}

机构：

[1] Nancy Univ, Inst Jean Lamour, Fac Sci & Tech, Dept CP2S,Equipe 206, F-54506 Vandoeuvre Les Nancy, France

[2] ICSM Site Marcoule, UMR 5257, Inst Chim Separat Marcoule, F-30207 Bagnols Sur Ceze, France

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2010年 / 93卷 / 05期

关键词：

REDOX CHEMISTRY; OPTICAL BASICITY; GLASS; BEHAVIOR; OXYGEN; IONS; EQUILIBRIUM; OXIDE; SPECTROSCOPY; DEPENDENCE;

D O I：

10.1111/j.1551-2916.2009.03581.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Chromium oxide solubility was measured in soda-lime-silicate melts using a thermochemical reactor allowing an independent control of temperature, glass composition, and oxygen fugacity in a closed system. This investigation performed in the ternary Na2O-CaO-xSiO(2) (NCS) system showed that the physicochemical and thermochemical models used for chromium chemistry description in binary melts are applicable in the ternary system. The presence of Cr(II), Cr(III), and Cr(VI) has been evidenced and their respective contributions in the total chromium content dissolved in the melt were determined. A new approach based on optical basicity allowed the quantification of the basicity of the melt and consequently the free oxygen ions activity (aO2-). The treatment of the obtained results led to the determination of thermodynamical properties of the system. The standard enthalpies and entropies corresponding to the oxidation and reduction reactions were determined.

引用

页码：1347 / 1354

页数：8

共 54 条

[41] REDOX CHEMISTRY IN CANDIDATE GLASSES FOR NUCLEAR WASTE IMMOBILIZATION [J].