Projects per year
Abstract
Ba0.09Al0.18Ti0.12O0.61 glasses have been produced by aerodynamic levitation and laser heating. Neutron diffraction, x-ray diffraction, x-ray absorption spectroscopy, molecular dynamics simulation, and reverse Monte Carlo refinement methods have been used to obtain a detailed atomistic structural model of the glass. This model has been used to investigate its atomic coordination and network structure. It is found that the Al atoms are almost
exclusively fourfold tetrahedrally coordinated to oxygen atoms. In contrast, the Ti atoms coordinate to oxygen atoms in approximately equal numbers of four- and fivefold coordinated sites with a small number of sixfold sites. The results show the presence of some tetrahedral TiO4 structural motifs although the dominant O-Ti-O bond angle occurs at 90◦ . It is found that Al/Ti-O network structure shows strong similarities with other oxide glass forming systems although a first sharp diffraction peak is not observed. The results are used to discuss the unusual properties of the Ba-Al-Ti-O glasses produced under different quenching conditions.
exclusively fourfold tetrahedrally coordinated to oxygen atoms. In contrast, the Ti atoms coordinate to oxygen atoms in approximately equal numbers of four- and fivefold coordinated sites with a small number of sixfold sites. The results show the presence of some tetrahedral TiO4 structural motifs although the dominant O-Ti-O bond angle occurs at 90◦ . It is found that Al/Ti-O network structure shows strong similarities with other oxide glass forming systems although a first sharp diffraction peak is not observed. The results are used to discuss the unusual properties of the Ba-Al-Ti-O glasses produced under different quenching conditions.
Original language | English |
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Article number | 094206 |
Number of pages | 15 |
Journal | Physical Review B: Condensed Matter and Materials Physics |
Volume | 90 |
Issue number | 9 |
Early online date | 24 Sep 2014 |
DOIs | |
Publication status | Published - 24 Sep 2014 |
Bibliographical note
Date of Acceptance: 04/08/2015Keywords
- Glass beads
- AERODYNAMIC LEVITATION
- structure
- Modelling studies
Fingerprint Dive into the research topics of 'Structure of Ba-Ti-Al-O glasses produced by aerodynamic levitation and laser heating.'. Together they form a unique fingerprint.
Projects
- 2 Finished
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NEUTRON AND X-RAY STUDIES OF THE STRUCTURE AND RELAXATION IN HIGH TEMPERATURE LEVITATED LIQUIDS AND GASES
1/10/08 → 1/10/12
Project: Research
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ELECTRONIC & THERMODYNAMIC PROPERTIES OF NOVEL MATERIALS PRODUCED BY AERODYNAMIC LEVITATION
1/10/06 → 1/10/08
Project: Research
Profiles
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Dr Adrian C Barnes
- The Bristol Centre for Nanoscience and Quantum Information
- School of Physics - Reader in Physics
Person: Academic , Member