Insight into the dehydration behaviour of scandium-substituted barium titanate perovskites via simultaneous in situ neutron powder thermodiffractometry and thermogravimetric analysis

Autor: Christopher S. Knee, Samantha K. Callear, Seikh Mohammad Habibur Rahman, Nico Torino, Paul F. Henry, Sten Eriksson, Ronald I. Smith

Publikováno v: Solid State Ionics. 324:233-240

Hydration-dehydration cycles are critical to the mechanical performance of ceramic proton conductors. The development of in situ methods is desirable in order to study their structural response under conditions that mimic the operating ones. Neutron

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1fe839df451c57ba142be14a8a3325d8
https://doi.org/10.1016/j.ssi.2018.07.010

Crystal structure and proton conductivity of BaSn0.6Sc0.4O3−δ: insights from neutron powder diffraction and solid-state NMR spectroscopy

Autor: Christopher S. Knee, Lucienne Buannic, Sten Eriksson, Clare P. Grey, Istaq Ahmed, Stephen Hull, Stefan T. Norberg, Frédéric Blanc, Zhehong Gan, Ivan Hung, Francis Gachau Kinyanjui

Publikováno v: JOURNAL OF MATERIALS CHEMISTRY A

The solid-state synthesis and structural characterisation of perovskite BaSn1−xScxO3−δ (x = 0.0, 0.1, 0.2, 0.3, 0.4) and its corresponding hydrated ceramics are reported. Powder and neutron X-ray diffractions reveal the presence of cubic perovsk

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0763dca0000115fbdd17a3f4a4ab268
https://doi.org/10.1039/c5ta09744d

Absence of magnetic ordering and field induced phase diagram in the Gadolinium Aluminium garnet

Autor: E. Lhotel, Christopher S. Knee, Pascale P. Deen, Henrik Jacobsen, O. Florea

Publikováno v: Physical Review B
Physical Review B, American Physical Society, 2017, 96 (22), pp.220413. ⟨10.1103/PhysRevB.96.220413⟩

The robustness of spin liquids with respect to small perturbations, and the way magnetic frustration can be lifted by slight changes in the balance between competing magnetic interactions remains a rich and open issue. We address this question throug

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2585c9f06b35f611c655aac45b4d9f75

Hydration Thermodynamics of the Proton Conducting Oxygen-Deficient Perovskite Series BaTi1–xMxO3–x/2 with M = In or Sc

Autor: Reidar Haugsrud, Sten Eriksson, Tor S. Bjørheim, Christopher S. Knee, Seikh Mohammad Habibur Rahman

Publikováno v: Inorganic Chemistry. 54:2858-2865

This article establishes the effect of structure and composition on water uptake and the hydration and proton transport properties of the oxygen-deficient perovskite series BaTi1-x(In,Sc)xO3-x/2, with 0.2 ≤ x ≤ 0.7. The equilibrium water uptake i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79e8c484188850c88a9dbce71c1f256d
https://doi.org/10.1021/ic503006u

The influence of cation ordering, oxygen vacancy distribution and proton siting on observed properties in ceramic electrolytes: the case of scandium substituted barium titanate

Autor: Paul F. Henry, Seikh Mohammad Habibur Rahman, Tor S. Bjørheim, Sten Eriksson, Nico Torino, Carlotta Giacobbe, Christopher S. Knee, E. Suard

Publikováno v: Dalton Transactions
Dalton Transactions, Royal Society of Chemistry, 2017, 46 (26), pp.8387-8398. ⟨10.1039/c7dt01559c⟩
'Dalton Transactions ', vol: 46, pages: 8387-8398 (2017)

International audience; The origin of the 2-order of magnitude difference in the proton conductivity of the hydrated forms of hexagonal and cubic oxygen deficient BaScxTi1-xO3-delta (x = 0.2 and x = 0.7) was probed using a combination of neutron diff

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db2bb86bbaf7acb0d45ff24be6360553
https://pubmed.ncbi.nlm.nih.gov/28590468