Effect of Iron Redox Equilibrium on the Foaming Behavior of MgO-Saturated Slags

The copper-iron redox equilibrium is shifted to the right CuII+FeII↔CuI+FeIII by strong ion-pairing of sulfate ion with FeIII and by specific solvation of CuI with acetonitrile. The equilibrium constant has been measured by direct e.m.f. and spectroscopic methods between pH 0-2 and found to be about 107 higher for practical solutions of sulfates in acetonitrile/water than that calculated for perchlorates in pure water. Enthalpies and free energies of transfer of these ions from water to acetonitrile/water show that the shift in equilibrium to Cul+FeIII in acetonitrile/water solution is strongly favoured by enthalpy changes associated with copper(I)-acetonitrile ion-solvation. Ion-pairing of sulfate ion with iron(III) results in an increase in entropy and a small shift of the equilibrium to the right.

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The role of phosphorus in rhyolitic liquids as determined from the homogeneous iron redox equilibrium

Contributions to Mineralogy and Petrology ◽

10.1007/bf00286932 ◽

1993 ◽

Vol 113 (3) ◽

pp. 424-435 ◽

Cited By ~ 9

Author(s):

Rosa Gwinn ◽

Paul C. Hess

Keyword(s):

Redox Equilibrium ◽

Iron Redox

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Iron redox equilibrium, structure and properties of zinc iron phosphate glasses

Journal of Non-Crystalline Solids ◽

10.1016/j.jnoncrysol.2006.10.002 ◽

2007 ◽

Vol 353 (2) ◽

pp. 151-158 ◽

Cited By ~ 30

Author(s):

S.T. Reis ◽

A. Moguš-Milanković ◽

V. Ličina ◽

J.B. Yang ◽

M. Karabulut ◽

...

Keyword(s):

Iron Phosphate ◽

Equilibrium Structure ◽

Phosphate Glasses ◽

Structure And Properties ◽

Redox Equilibrium ◽

Iron Phosphate Glasses ◽

Iron Redox

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Iron Redox Reactions in Model Nuclear Waste Glasses and Melts

MRS Proceedings ◽

10.1557/proc-1124-q03-02 ◽

2008 ◽

Vol 1124 ◽

Cited By ~ 1

Author(s):

Benjamin Cochain ◽

Daniel R. Neuville ◽

Jacques Roux ◽

Dominique De Ligny ◽

Denis Testemale ◽

...

Keyword(s):

Nuclear Waste ◽

Oxidation Kinetic ◽

Limiting Factor ◽

Redox Equilibrium ◽

Alkali Cations ◽

Transition Range ◽

Nuclear Waste Storage ◽

Waste Storage ◽

Redox Kinetics ◽

Iron Redox

AbstractThe influence of boron on the kinetics of oxidation of iron in silicate melts relevant to nuclear waste storage has been investigated by XANES experiments. The measurements have been performed isothermally as a function of time at the iron K-edge. The redox kinetics become slower with increasing B2O3 content either close to the glass transition range, where the redox kinetics are controlled by diffusion of network-modifying cations, or at superliquidus temperatures where oxygen diffusion is the rate-limiting factor. In both ranges the kinetics can be interpreted in terms of boron speciation and interaction with alkali cations. Below the liquidus, however, the long times needed to reach redox equilibrium allow sintering of the powders investigated to take place so that the resulting changes in sample geometry prevent determinations of oxidation kinetic parameters from being made.

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Iron redox equilibrium, structure and properties of iron phosphate glasses

Journal of Non-Crystalline Solids ◽

10.1016/s0022-3093(01)00416-1 ◽

2001 ◽

Vol 283 (1-3) ◽

pp. 162-172 ◽

Cited By ~ 95

Author(s):

Xiangyu Fang ◽

Chandra S Ray ◽

Andrea Moguš-Milanković ◽

Delbert E Day

Keyword(s):

Iron Phosphate ◽

Equilibrium Structure ◽

Phosphate Glasses ◽

Structure And Properties ◽

Redox Equilibrium ◽

Iron Phosphate Glasses ◽

Iron Redox

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Effect of Compatibility on the Foaming Behavior of Injection Molded Polypropylene and Polycarbonate Blend Parts

Polymers ◽

10.3390/polym11020300 ◽

2019 ◽

Vol 11 (2) ◽

pp. 300 ◽

Cited By ~ 9

Author(s):

Bei Su ◽

Ying-Guo Zhou ◽

Bin-Bin Dong ◽

Cao Yan

Keyword(s):

Morphological Structure ◽

Potential Method ◽

Grafted Polymers ◽

Dynamic Mechanical Analyzer ◽

Blowing Agent ◽

Cell Nucleation ◽

Foaming Behavior ◽

Thermal Features ◽

Injection Molded ◽

Scanning Electron

To improve the foaming behavior of a common linear polypropylene (PP) resin, polycarbonate (PC) was blended with PP, and three different grafted polymers were used as the compatibilizers. The solid and foamed samples of the PP/PC 3:1 blend with different compatibilizers were first fabricated by melt extrusion followed by injection molding (IM) with and without a blowing agent. The mechanical properties, thermal features, morphological structure, and relative rheological characterizations of these samples were studied using a tensile test, dynamic mechanical analyzer (DMA), scanning electron microscope (SEM), and torque rheometer. It can be found from the experimental results that the influence of the compatibility between the PP and PC phases on the foaming behavior of PP/PC blends is substantial. The results suggest that PC coupling with an appropriate compatibilizer is a potential method to improve the foamability of PP resin. The comprehensive effect of PC and a suitable compatibilizer on the foamability of PP can be attributed to two possible mechanisms, i.e., the partial compatibility between phases that facilitates cell nucleation and the improved gas-melt viscosity that helps to form a fine foaming structure.

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