دورية أكاديمية
أعرض في EDS

Structure of crystalline and amorphous materials in the NASICON system Na 1+x Al x Ge 2-x (PO 4 ) 3 .

التفاصيل البيبلوغرافية
العنوان: Structure of crystalline and amorphous materials in the NASICON system Na 1+x Al x Ge 2-x (PO 4 ) 3 .
المؤلفون: Gammond LVD; Department of Physics, University of Bath, Bath BA2 7AY, United Kingdom., Auer H; Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Winterbergstraße 28, 01277 Dresden, Germany., Mendes Da Silva R; Department of Physics, University of Bath, Bath BA2 7AY, United Kingdom., Zeidler A; Department of Physics, University of Bath, Bath BA2 7AY, United Kingdom., Ortiz-Mosquera JF; Universidade Federal de São Carlos, Programa de P¢s-Graduaåão em Ciæncia e Engenharia de Materiais, CP 676, 13565-905 São Carlos, SP, Brazil., Nieto-Muñoz AM; Universidade Federal de São Carlos, Programa de P¢s-Graduaåão em Ciæncia e Engenharia de Materiais, CP 676, 13565-905 São Carlos, SP, Brazil., Rodrigues ACM; Departamento de Engenharia de Materiais, Universidade Federal de São Carlos, CP 676, 13565-905 São Carlos, SP, Brazil., d'Anciães Almeida Silva I; Instituto de Física de São Carlos, Universidade de São Paulo, CP 369, São Carlos SP 13566-590, SP, Brazil., Eckert H; Instituto de Física de São Carlos, Universidade de São Paulo, CP 369, São Carlos SP 13566-590, SP, Brazil., Benmore CJ; X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, USA., Salmon PS; Department of Physics, University of Bath, Bath BA2 7AY, United Kingdom.
المصدر: The Journal of chemical physics [J Chem Phys] 2021 Aug 21; Vol. 155 (7), pp. 074501.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: American Institute of Physics Country of Publication: United States NLM ID: 0375360 Publication Model: Print Cited Medium: Internet ISSN: 1089-7690 (Electronic) Linking ISSN: 00219606 NLM ISO Abbreviation: J Chem Phys Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة: Publication: New York, NY : American Institute of Physics
Original Publication: Lancaster, Pa., American Institute of Physics.
مستخلص: The structure of crystalline and amorphous materials in the sodium (Na) super-ionic conductor system Na 1+x Al x Ge 2-x (PO 4 ) 3 with x = 0, 0.4, and 0.8 was investigated by combining (i) neutron and x-ray powder diffraction and pair-distribution function analysis with (ii) 27 Al and 31 P magic angle spinning (MAS) and 31 P/ 23 Na double-resonance nuclear magnetic resonance (NMR) spectroscopy. A Rietveld analysis of the powder diffraction patterns shows that the x = 0 and x = 0.4 compositions crystallize into space group-type R3̄, whereas the x = 0.8 composition crystallizes into space group-type R3̄c. For the as-prepared glass, the pair-distribution functions and 27 Al MAS NMR spectra show the formation of sub-octahedral Ge and Al centered units, which leads to the creation of non-bridging oxygen (NBO) atoms. The influence of these atoms on the ion mobility is discussed. When the as-prepared glass is relaxed by thermal annealing, there is an increase in the Ge and Al coordination numbers that leads to a decrease in the fraction of NBO atoms. A model is proposed for the x = 0 glass in which super-structural units containing octahedral Ge (6) and tetrahedral P (3) motifs are embedded in a matrix of tetrahedral Ge (4) units, where superscripts denote the number of bridging oxygen atoms. The super-structural units can grow in size by a reaction in which NBO atoms on the P (3) motifs are used to convert Ge (4) to Ge (6) units. The resultant P (4) motifs thereby provide the nucleation sites for crystal growth via a homogeneous nucleation mechanism.
تواريخ الأحداث: Date Created: 20210822 Latest Revision: 20210822
رمز التحديث: 20221213
DOI: 10.1063/5.0049399
PMID: 34418933
قاعدة البيانات: MEDLINE
الوصف
تدمد:1089-7690
DOI:10.1063/5.0049399