On the aggregation process of ceramic LiSn2P3O12 particles embedded in Teflon matrix
✍ Scribed by Monica G. Lazarraga; Joaquin Ibañez; Mohamed Tabellout; Jose M. Rojo
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 540 KB
- Volume
- 64
- Category
- Article
- ISSN
- 0266-3538
No coin nor oath required. For personal study only.
✦ Synopsis
Composites having ceramic LiSn 2 P 3 O 12 particles, that are Li + ion conductor, and Teflon, that is an insulating polymer and works as binder, have been prepared in a wide compositional range (from 8 to 74% by volume of LiSn 2 P 3 O 12 ). Their microstructure, as followed by Scanning Electron Microscopy, has been analyzed to understand the aggregation process of the ceramic particles. For low LiSn 2 P 3 O 12 contents (below 30% by volume) some particles lay isolated and some aggregated in clusters (isolated clusters) both being surrounded by Teflon. For higher LiSn 2 P 3 O 12 contents the isolated clusters grow and transform into clusters that are developed along the composite bulk (extended clusters); the latter clusters accounts for the ionic conductivity, which is discussed in terms of a percolation model. The shape and size of both types of clusters are analyzed as the LiSn 2 P 3 O 12 content increases. The aggregation process here described could work in other composites made from mixing and compacting particles of a ceramic and a polymer.