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Oxide ion vacancy distribution in A site substituted defect pyrochlores.
Electrolytes based on pyrochlores such as Ln2M2O7 (M = Ti, Zr, Hf) have attracted attention due to their relative stability combined with relatively high ionic conductivity at... -
Copy of: Local magnetic order and the paramagnetic-parmagnetic transition in MnO
The antiferromagnetic-paramagnetic transition in MnO at 118 K occurs at a much lower temperature than anticipated from its Curie-Weiss constant theta~550 K. Consequently, strong... -
In-situ studies of alkaline earth nitride deuterides
Heavy alkaline earth nitride hydrides (AE2NH, with AE = Ca and Ba) are of interest due to their potential suitability as electrolyte materials in a variety of electrochemical... -
Programme Access Rosseinsky
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Defect structure in W/Ln and Ta/Ln di-substituted bismuth oxide based solid e...
The stability regime of the oxide ion conductor delta-Bi2O3 is limited to a narrow temperature range just below its melting point. Substitution of Bi3+ by a variety of isovalent... -
Local structure in layered perovskite oxides - probing ion transport in fuel ...
Layered oxides are increasingly attractive as electrode materials in energy technology applications, such as fuel cells, electrolysers and permeation membranes. As the... -
Order-Disorder Transitions in Layered Tellurides
We have prepared a new series of layered tellurides Cr2-xInxGe2Te6, containing 2D ordered arrays of (Cr,In) cations and (Ge-Ge) pairs. Recent neutron measurements reveal indium... -
In-situ conductivity study of double perovskites for use as potential anode m...
It is a challenge to develop materials for use in fuel cell applications. Presently we are preparing new perovskite and double perovskite structured compounds being potential... -
Fluorophosphate Derivatives of Gypsum and Lithium in Biogenic Manganese Oxides
This proposal seeks neutron diffraction beamtime to study two important systems. We have demonstrated that monofluorophosphate (PO3F) can be substituted into gypsum (CaSO4.2H2O)... -
Hydrogen from ammonia using lithium imide metal nitride composites
Light metal amides and imides are a new class of highly active ammonia decomposition catalysts. Indeed, composites of lithium imide and transition metal nitrides are likely to... -
High resolution neutron powder diffraction studies of the cubic spinels Li2Ni...
We propose to study the structures of Li2NiGe3O8 and Li2ZnGe3O8 using variable temperature high resolution powder neutron diffraction, with the intention of locating the Li... -
In Search of Superionic Conductivity of Mg2+ Cations
The migration of cations with a charge greater than 1 has received very little attention historically, perhaps due to no commercially driven demand for the research as well as... -
Oxide Ion Disorder in Rhombohedral Bismuth Neodymium Oxide Electrolytes
Materials that exhibit high oxide ion conductivity are of interest with a view to their application in solid oxide fuel cells, gas sensors and gas separation membranes. A study... -
Ba3Mo1-xNb1+xO8.5-x/2 novel oxide ion conductor: Local structure and structur...
Oxide ion conductors are researched as potential electrolytes in solid oxide fuel cells (SOFCs). Yttria-stabilized zirconia is currently the most commonly used electrolyte in... -
Crystallographic Basis for the High Temperature, 2D Invar Effect in Copper Gi...
We wish to study the gillespite-structured phase Ba0.5Sr0.5CuSi4O10 at high temperatures to determine the structural basis of the invar-like (zero thermal expansion) of the a-b... -
In-Situ Studies of Electrochemically Enhanced Performance in Perovskite Elect...
Recent studies in our laboratory have shown that a range of A-site deficient perovskite oxides, with carefully tuned chemical compositions, exhibit excellent properties when... -
QENS Investigation of Proton Conduction Mechanism in Spark-Plasma-Sintered Pr...
Fuel cells exhibit high-energy efficiency and the only release is clean water when used with hydrogen. Proton ceramic fuel cells (PCFC) are from special interest because proton... -
Define the crystal structures of lead-free ferroelectric, candidate multiferr...
We have a range of new structures in the lead-free ferroelectric, candidate multiferroic and SOFC cathode areas. The HRPD data will be used to define these new crystal... -
Apatite-type Oxides for Energy Applications: Role of Lattice Dynamics
Lanthanum-containing germanate apatites are materials with potential applications as electrolytes in solid oxide fuel cells. The conductivity of these materials is known to... -
Na-Dynamics in Solid Ionic Conductors: 11Al2O3-Na2O and Na2Ti3O7
We would measure vibrational spectra as well as quasielastic neutron scattering (QENS) spectra for beta- alumina (11Al2O3-Na2O) and Na2Ti3O7. The measurement of phonon spectra...
