Optical Basicity

2005 ◽  
pp. 319-352 ◽  
Author(s):  
E Bordes-Richard ◽  
P Courtine
Keyword(s):  
Optical Basicity

Acid-base properties of metals and glasses of Na2O.P2O5-xB2O3 system

1984 ◽  
Vol 49 (10) ◽  
pp. 2355-2362 ◽  
Author(s):  
Juraj Leško ◽  
Marie Dorušková ◽  
Jan Tržil
Keyword(s):  
Boron Oxide ◽  
A Priori ◽  
Optical Basicity ◽  
Galvanic Cell ◽  
Acid Base ◽  
Tetrahedral Configuration ◽  
Relative Basicity ◽  
Base Theory ◽  
Base Properties

Boron oxide in the Na2O.P2O5-x B2O3 system behaves as a Lux base. Its addition to Na2O.P2O5 brings about transformation of a Co(II) indicator from octahedral to tetrahedral configuration, increase in the optical basicity ΛPb(II), increase in the relative basicity of the melt as determined by means of a galvanic cell, and depolymerization reactions releasing PO43- ions. In the Na2O-B2O3 system free of P2O5, boron oxide behaves as a Lux acid. The amphoretic nature of B2O3 is explained in terms of Lux's acid-base theory extended in analogy with the protolysis theory. The theoretical optical basicity values do not indicate the amphoretic behaviour of B2O3 because in this approach boron oxide is a priori regarded as more acidic than Na2O.P2O5.

scholarly journals Estimation of Sulfide Capacities of Multicomponent Slags using Optical Basicity

2013 ◽  
Vol 53 (5) ◽  
pp. 761-767 ◽  
Author(s):  
Guo-Hua Zhang ◽  
Kuo-Chih Chou ◽  
Uday Pal
Keyword(s):  
Optical Basicity

scholarly journals Effect of Al2O3, MgO, and CuOx on the dissolution behavior of rhodium in the Na2O-SiO2 slags

2013 ◽  
Vol 49 (2) ◽  
pp. 131-138 ◽  
Author(s):  
C. Wiraseranee ◽  
T. Yoshikawa ◽  
T.H. Okabe ◽  
K. Morita
Keyword(s):  
High Temperature ◽  
Thermodynamic Properties ◽  
Activity Coefficient ◽  
Sodium Silicate ◽  
Slag Composition ◽  
Slag Basicity ◽  
Optical Basicity ◽  
Dissolution Behavior ◽  
Recycling Process ◽  
Oxide Addition

Aiming to optimize rhodium recovery in the high temperature recycling process by minimizing rhodium loss into slags in an oxidizing atmosphere by controlling slag composition, the effects of representative slag components, such as Al2O3, MgO, and CuOx, on the dissolution behavior of rhodium into the Na2O-SiO2 slags was investigated. The solubility of rhodium was measured by equilibrating the sodium silicate based slags with pure solid rhodium at 1473 K in air. Considering that rhodium dissolved into slags as RhO1.5, the effect of the oxide addition on the activity coefficient of RhO1.5 in slags was determined. The dissolution of rhodium in slags was suppressed by the addition of Al2O3 and MgO, where Al2O3 behaved as an acidic oxide and MgO behaved as a diluent of slag basicity at a fixed Na2O/SiO2 ratio of 0.97. The content of copper in solid rhodium equilibrated with the CuOx bearing slags slightly increased with increasing content of CuOx, and CuOx was found to slightly enhance the dissolution of rhodium. Rhodate capacity of all slag systems increased with increasing optical basicity, suggesting that the correlation between rhodate capacity and the optical basicity enables the estimation of the content of rhodium in slags of which thermodynamic properties of rhodium are not clarified.

Effect of Optical Basicity on Luminescence Properties of Tb3+Doped Bi2O3-B2O3Glasses

2014 ◽  
Vol 35 (4) ◽  
pp. 413-419 ◽  
Author(s):  
刘盼 LIU Pan ◽  
殷海荣 YIN Hai-rong ◽  
郭宏伟 GUO Hong-wei ◽  
董继先 DONG Ji-xian
Keyword(s):  
Optical Basicity ◽  
Luminescence Properties
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