| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
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| Symposium
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Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work: The Rustum Roy Symposium
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| Presentation Title |
Novel Electrode Configuration Effects on the Microstructural Homogeneity of Flash Sintered Ceramics for Solid-state Battery Electrolytes. |
| Author(s) |
Gareth M. Jones, Chris Green, Sherry Ghanizadeh, David Pearmain, Geoff West, Emma Kendrick, Claire E.J Dancer |
| On-Site Speaker (Planned) |
Gareth M. Jones |
| Abstract Scope |
Flash sintering (FS) enables rapid sintering of ceramic materials at reduced furnace temperatures, of particular interest are volatile materials with high conventional sintering temperatures such as oxide based solid-state electrolytes. We demonstrate FS on the solid-state electrolyte materials sodium-beta’’ alumina and aluminium-doped lithium lanthanum zirconium oxide. Uncontrolled current flow during FS can result in hotspot formation and heterogeneous microstructure. Here we will discuss two technological developments for FS that allow increased control of the current flow. First, multi electrode flash sintering, where three electrodes are separately driven to homogenise the current flow through the ceramic green. Secondly, contactless flash sintering, where contact between the sample and electrodes is made by a conductive gaseous medium, with the electrode moving across the sample surface. The different electrode configurations are compared through examination of the microstructural features of the flash sintered ceramics by scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. |