Hysteresis in the β–α phase transition in silver iodide

@article{Binner2006HysteresisIT,
  title={Hysteresis
in the $\beta$–$\alpha$ phase transition in silver iodide},
  author={Jon Binner and Georgios Dimitrakis and Duncan M. Price and Mike Reading and B. Vaidhyanathan},
  journal={Journal of Thermal Analysis and Calorimetry},
  year={2006},
  volume={84},
  pages={409-412}
}
AbstractThe nature of the β to α phase transition in silver iodide was investigated by conventional and modulated temperature DSC and dielectric property measurements. On cooling, the high temperature phase remained stable 2.5°C below its normal transition temperature even at a very slow cooling rate 0.2°C h–1. Dielectric property measurements under conventional and microwave heating suggested an anomalous effect of the latter on the β to α phase transition in this material. 

Figures from this paper

The Room-Temperature Superionic Conductivity of Silver Iodide Nanoparticles under Pressure.
TLDR
To the first example of the α-phase of AgI existing stably at room temperature, variable-temperature synchrotron powder X-ray diffraction measurements and impedance spectroscopy under pressure for silver iodide nanoparticles with a diameter of 11 nm are performed. Expand
Disappearance of the Superionic Phase Transition in Sub-5 nm Silver Iodide Nanoparticles.
TLDR
The results of extended X-ray absorption fine structure analysis, differential scanning calorimetry (DSC), and AC impedance spectroscopy demonstrated that the very small AgI nanoparticles did not exhibit the superionic phase transition and their ionic conductivity was lower than that of crystalline AgI. Expand
Anomalous phase transition and ionic conductivity of AgI nanowire grown using porous alumina template
Silver-iodide (AgI)-based superionic conductors are attracting widespread interest for their potential applications in electrochemical devices such as sensors and batteries. A new kind ofExpand
Rock-salt and helix structures of silver iodides under ambient conditions
Abstract Many different phase structures have been discovered for silver iodides. The β and γ phases were found to be the most common ones at ambient conditions, while the rock-salt phase was foundExpand
Applications of a simultaneous differential scanning calorimetry–thermomicroscopy system
A simultaneous DSC–thermomicroscopy system (DSC450 Linkam Scientific) was applied to the study of phase transitions in rubidium nitrate and silver iodide, the oxidation of polyethylene, the thermalExpand
Switching behavior of thermochromic copper and silver tetraiodomercurate embedded in silica hybrid materials
Abstract Thermochromic silica hybrids containing copper or silver mercuric iodides and cetyltrimethylammonium bromide (CTAB) were obtained and characterized. The color and switching behavior of theExpand
Potentiometric sensing of iodide using polymeric membranes of microwave stabilized β-AgI
Abstract A polymer based heterogeneous ion selective electrode (ISE) membrane was fabricated for the potentiometric sensing of iodide. The sensing element used for the preparation of the ISE membraneExpand
Giant barocaloric effects over a wide temperature range in superionic conductor AgI
TLDR
Giant inverse barocaloric effects are demonstrated in the solid electrolyte AgI, near its superionic phase transition at ~420 K, resulting in large values of refrigerant capacity and the peak values of isothermal entropy change and adiabatic temperature changes exceed all values previously recorded for barocalic materials. Expand
Structural study of α-lactose monohydrate subjected to microwave irradiation
The aim of this work was to investigate the influence of different levels of microwave irradiation on the structure and particle size characteristics of α-lactose monohydrate. The structural study ofExpand
“Ag2HgI4” a thermochromic compound with superionic conducting properties: Synthesis, characterization and investigation of graphene-based nanocomposites
Abstract In this work, silver tetraiodomercurate (Ag2HgI4) nanoparticles as a compound with two properties: thermochromism with performance as sensor and superionic conducting with solid electrolyticExpand
...
1
2
3
...

References

SHOWING 1-10 OF 29 REFERENCES
Anomalous specific heat of silver iodide
Abstract The temperature dependence of the specific heat of single crystal samples of silver iodide (AgI), which were grown from solution in the β phase, was measured over the temperature rangeExpand
Ordering of the silver ions in alpha -AgI: A mechanism for the alpha - beta phase transition.
The disorder or the Ag+ions in the superionic conductor α-AgI has been studied with use or computer simulations in which reorganizations or the I - lattice are inhibited. At high temperatures theExpand
Structural Transitions in Superionic Conductors
The ..cap alpha..arrow-right-left..beta.. phase transition in AgI is studied with use of the new molecular-dynamics technique which allows for a dynamical variation of the shape and size of the cell.Expand
Heat capacity, thermodynamic properties, and transitions of silver iodide
The heat capacity of silver iodide was measured using adiabatic calorimetric cryostats over the ranges 7 to 350 K and from 2 to 75 K. The (0 to a)- and (g/y to a)-transitions and the heat capacitiesExpand
XRD and thermal studies of AgI confined in nm-size pores by forming porous silica-AgI composites
To investigate the nm-size dependence of structural and thermal properties for AgI, the formation of composites between AgI and porous silica with controlled pore diameters of 10, 15, 30, and 50 nmExpand
Disordering phenomena in superionic conductors
Superionic conductors are materials which exhibit exceptionally high ionic conductivity whilst in the solid state. The manner in which certain structures accommodate superionic conduction hasExpand
Kinetic equations for thermal dissociation processes
The kinetics of thermal dissociation was studied for polydisperse systems (naturally occurring calcite and precipitated calcium carbonate) with normal and Rosin-Rammler-Sperling distributions.Expand
Solid State Ionics
This issue of the MRS BULLETIN contains three articles relating to the general field that has come to be known as Solid State Ionics. The central feature of this area of science and emergingExpand
Development of a microwave calorimeter for simultaneous thermal analysis
An instrument has been developed for monitoring cure processes under microwave heating conditions. The main function of the instrument was a calorimeter for performing microwave thermal analysis. AExpand
MODELING AND NUMERICAL SIMULATIONS OF MICROWAVE-INDUCED IONIC TRANSPORT
A numerical model was developed to simulate and study microwave-induced transport in ionic solids. The model is based on continuum equations, is very general, and could be applied to many materials.Expand
...
1
2
3
...