A new model linking elastic properties and ionic conductivity of mixed network former glasses

2018 ◽  
Vol 20 (3) ◽  
pp. 1629-1641 ◽  
Author(s):  
Weimin Wang ◽  
Randilynn Christensen ◽  
Brittany Curtis ◽  
Steve W. Martin ◽  
John Kieffer
Keyword(s):  
Light Scattering ◽  
Ionic Conductivity ◽  
Impedance Spectroscopy ◽  
Elastic Properties ◽  
Thermodynamic Model ◽  
Elastic Moduli ◽  
Statistical Thermodynamic ◽  
Systematic Comparison ◽  
New Model ◽  
Mixed Network

A new statistical thermodynamic model has been developed to describe the activated process of cation hopping in mixed network former glasses based on the systematic comparison between the adiabatic elastic moduli measured using Brillouin light scattering and the ionic conductivity measured using dielectric impedance spectroscopy.

Elastic properties and short-range structural order in mixed network former glasses

2017 ◽  
Vol 19 (24) ◽  
pp. 15942-15952 ◽  
Author(s):  
Weimin Wang ◽  
Randilynn Christensen ◽  
Brittany Curtis ◽  
David Hynek ◽  
Sydney Keizer ◽  
...  
Keyword(s):  
Light Scattering ◽  
Nmr Spectroscopy ◽  
Elastic Properties ◽  
Thermodynamic Model ◽  
Short Range ◽  
Elastic Moduli ◽  
Statistical Thermodynamic ◽  
Ternary Oxide ◽  
Oxide Glasses ◽  
Mixed Network

A new statistical thermodynamic model has been developed to describe the speciation of network former elements in ternary oxide glasses, which uses data from NMR spectroscopy and the adiabatic elastic moduli measured using Brillouin light scattering as input.

scholarly journals Statistical-thermodynamic model for light scattering from eye lens protein mixtures

2017 ◽  
Vol 146 (5) ◽  
pp. 055101 ◽  
Author(s):  
Michael M. Bell ◽  
David S. Ross ◽  
Maurino P. Bautista ◽  
Hossein Shahmohamad ◽  
Andreas Langner ◽  
...  
Keyword(s):  
Light Scattering ◽  
Thermodynamic Model ◽  
Statistical Thermodynamic ◽  
Eye Lens ◽  
Lens Protein ◽  
Eye Lens Protein

scholarly journals A thermodynamic model of thermal end elastic properties of curium

2013 ◽  
Vol 443 (1-3) ◽  
pp. 17-19 ◽  
Author(s):  
A.A. Povzner ◽  
A.N. Filanovich ◽  
V.A. Oskina
Keyword(s):  
Elastic Properties ◽  
Thermodynamic Model

scholarly journals A statistical thermodynamic model of the organizational order of vegetation

2002 ◽  
Vol 153 (1-2) ◽  
pp. 69-80 ◽  
Author(s):  
Huayong Zhang ◽  
Jianguo Wu
Keyword(s):  
Thermodynamic Model ◽  
Statistical Thermodynamic

Statistical Thermodynamic Model for Si/Al Ordering in Amorphous Aluminosilicates

2005 ◽  
Vol 17 (11) ◽  
pp. 2976-2986 ◽  
Author(s):  
John L. Provis ◽  
Peter Duxson ◽  
Grant C. Lukey ◽  
Jannie S. J. van Deventer
Keyword(s):  
Thermodynamic Model ◽  
Statistical Thermodynamic

scholarly journals Statistical Thermodynamic Model of Gas Adsorption in a Metal-Organic Framework Harboring a Rotaxane Molecular Shuttle

2019 ◽  
Author(s):  
Jonathan Carney ◽  
David Roundy ◽  
Cory M. Simon
Keyword(s):  
Thermodynamic Model ◽  
Gas Adsorption ◽  
Metal Organic Framework ◽  
Adsorption Properties ◽  
Statistical Thermodynamic ◽  
Temperature Sensitive ◽  
Adsorption Sites ◽  
Metal Organic ◽  
Dynamic Components ◽  
Molecular Shuttle

Metal-organic frameworks (MOFs) are modular and adjustable nano-porous materials with applications in gas storage, separations, and sensing. Flexible/dynamic components that respond to adsorbed gas can give MOFs unique or enhanced adsorption properties. Here, we explore the adsorption properties that could be imparted to a MOF by a rotaxane molecular shuttle (RMS) in its pores. In an RMS-MOF, a macrocyclic wheel is mechanically interlocked with a strut. The wheel shuttles between stations on the strut that are also gas adsorption sites. We pose and analyze a simple statistical thermodynamic model of gas adsorption in an RMS-MOF that accounts for (i) wheel/gas competition for sites on the strut and (ii) the entropy endowed by the shuttling wheel. We determine how the amount of gas adsorbed, position of the wheel, and energy change upon adsorption depend on temperature, pressure, and the interactions of the gas/wheel with the stations. Our model reveals that, compared to an ordinary Langmuir material, the chemistry of the RMS-MOF can be tuned to render adsorption more or less temperature-sensitive and release more or less heat upon adsorption. The model also uncovers a non-monotonic relationship between temperature and the position of the wheel if gas out-competes the wheel for its preferable station.

H3PO4 / oxide nanoparticles / polymer composites as proton conducting membranes

2001 ◽  
Vol 703 ◽  
Author(s):  
D. Carrière ◽  
P. Barboux ◽  
M. Moreau ◽  
J.-P. Boilot
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Infrared Spectroscopy ◽  
Light Scattering ◽  
Magnetic Resonance ◽  
Impedance Spectroscopy ◽  
Composite Membranes ◽  
Oxide Nanoparticles ◽  
Zirconium Acetate ◽  
Conductive Particles ◽  
Conducting Membranes

ABSTRACTStable sols of 60 nm colloidal zirconia have been prepared by thermolysis of zirconium acetate. The surface complexing acetate groups have been replaced by phosphoric acid groups. Phosphate grafting has been characterized by dynamic light scattering, infrared spectroscopy, 31P nuclear magnetic resonance and impedance spectroscopy measurements. These systems give acid and proton conductive particles (4.10-5 S.cm-1 at 70 % relative humidity).H3PO4/ZrO2/PVDF-co-HFP composite membranes have been synthesized. Impedance spectroscopy measurements allow discrimination between proton conduction at the surface of the phosphated particles and within free H3PO4 in the polymer. For the highest H3PO4/ZrO2 ratios, the latter phenomenon prevails, giving a proton conductivity of 6.10-4 S.cm-1 at 70 % R.H.

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