Configurational constraints on glass formation in the liquid calcium aluminate system

  title={Configurational constraints on glass formation in the liquid calcium aluminate system},
  author={James W. E. Drewitt and Sandro Jahn and Louis Hennet},
  journal={Journal of Statistical Mechanics: Theory and Experiment},
We report new time-resolved synchrotron x-ray diffraction (SXRD) measurements to track structural transformations in calcium-aluminate (CaO)x(Al2O3)1−x liquids during glass formation, and review recent progress in neutron diffraction with isotope substitution (NDIS) experiments, combined with aspherical ion model molecular dynamics (AIM-MD) simulations, to identify the atomic-scale configurational constraints on glass-forming ability. The time-resolved measurements reveal substantial changes in… 
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Liquid structure under extreme conditions: high-pressure x-ray diffraction studies
  • J. W. Drewitt
  • Physics, Chemistry
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2021
This topical review examines methods for high pressure synchrotron x-ray diffraction of liquids and the wide variety of systems which have been studied, from simple liquid metals and their remarkable complex behaviour at high-pressure, to molecular-polymeric liquid–liquid transitions in pnicogen and chalcogen liquids, and density-driven structural transformations in water and silicate melts.
Structure of levitated Si–Ge melts studied by high-energy x-ray diffraction in combination with reverse Monte Carlo simulations
Experiments were performed by using the containerless technique of aerodynamic levitation with CO2 laser heating, enabling deeper supercooling of liquid Si and Si–Ge alloys than previously reported, and there is evidence of developing local tetrahedral ordering.
Preface: Special issue ‘Unifying Concepts in Glass Physics VII’
This special issue presents papers from the Unifying Concepts in Glass Physics VII conference, which focussed on new developments in our understanding the glass transition, jamming and related slow


Structure of liquid tricalcium aluminate
The atomic-scale structure of aerodynamically levitated and laser-heated liquid tricalcium aluminate (Ca 3 Al 2 O 6) was measured at 2073(30) K by using the method of neutron diffraction with Ca
Short- and intermediate-range order in levitated liquid aluminates
We have used the aerodynamic levitation technique combined with CO2 laser heating to study the structures of liquid CaAl2O4 and MgAl2O4 with x-ray and neutron diffraction. We determined the structure
Structure of molten CaSiO3: neutron diffraction isotope substitution with aerodynamic levitation and molecular dynamics study.
The results show a substantial broadening of the first Ca-O peak in the pair distribution function of the melt compared to the glass, which comprises primarily of 6- and 7-fold coordinated Ca-polyhedra.
Structural transformations on vitrification in the fragile glass-forming system CaAl2O4.
The structure of the fragile glass-forming material CaAl(2)O(4) was measured by applying the method of neutron diffraction with Ca isotope substitution to the laser-heated aerodynamically levitated liquid and to the glass at 300(1) K to reveal key structural modifications on multiple length scales.
Medium-range order in the cation distribution of a calcium silicate glass
Silicate glasses have conventionally been regarded as silicate frameworks in which cations are distributed at random. Neutron scattering from isotopically substituted samples allows correlations
A time resolved high energy X-ray diffraction study of cooling liquid SiO2.
At higher temperatures deviations from linear behavior are seen in the first sharp diffraction peak width, height and area at around 1750(50) K, which coincides with the reported density maximum around 1.2T(g).
Magnesium and Calcium Aluminate Liquids: In Situ High-Temperature 27Al NMR Spectroscopy
Ion dynamics simulations for these liquids suggest the presence of four-, five-, and six-coordinated aluminate species, in agreement with NMR experiments on fast-quenched glasses, which is evidenced by a single Lorentzian NMR line.