| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Design and Synthesis of Alkaline-earth Doped Hexaborides with Sodium and Potassium Dopants |
| Author(s) |
Alan Hirales, Justin Nakamura, Olivia A. Graeve |
| On-Site Speaker (Planned) |
Justin Nakamura |
| Abstract Scope |
We present the synthesis and crystallography of two metal hexaboride solid solutions, Ca<sub>1-<i>x</i></sub>M<sub><i>x</i></sub>B<sub>6</sub> and Sr<sub>1-<i>x</i></sub>M<sub><i>x</i></sub>B<sub>6</sub> (<i>x</i> = 0, 0.1, 0.3, 0.5), where M is Na or K; and show their evolution as the experimental concentration, <i>x</i>, is increased. The hexaborides were synthesized by solution combustion synthesis with a subsequent washing by HCl. Results on structure by X-ray diffraction and scanning electron microscopy showed minimal changes in lattice parameters, particle shapes and interplanar spacings. Dopant concentration analyses were carried out using inductively coupled plasma mass spectrometry, showing an atomic percentage from 1% to 3%, depending on the dopant metal, and resulting in a relatively small dopant level increase as the precursor concentration of the dopant increased. Additionally, Ca<sub>1-<i>x</i></sub>M<sub><i>x</i></sub>B<sub>6</sub> compounds show a lower ion incorporation for both dopants compared to Sr<sub>1-<i>x</i></sub>M<sub><i>x</i></sub>B<sub>6</sub>. Further research is projected to determine the effect of dopant on the electrical properties of hexaboride solutions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Electronic Materials, Powder Materials |