| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Manufacturing and Processing of Advanced Ceramic Materials
|
| Presentation Title |
Development of New Synthesis Route for Environmentally Friendly Thermoelectric Rare Earth Borocarbonitrides for Upcoming Carbon-neutral Society |
| Author(s) |
Hyoung-Won Son, Takao Mori, Masatoshi Takeda, David Berthebaud, Philipp Sauerschnig, Quansheng Guo, Tadachika Nakayama |
| On-Site Speaker (Planned) |
Hyoung-Won Son |
| Abstract Scope |
Borides are prospective candidates for high temperature thermoelectric applications owing to their attractive properties such as high melting point and excellent hardness. Especially, the homologous series of rare earth borocarbonitrides, RB15.5CN and RB22C2N, were found to exhibit n-type semiconducting behaviors and possess similar crystal structures to p-type boron carbides, and thus they are expected to be applicable as n-type counterparts in a new-type boride-based thermoelectric generator. Moreover, these compounds capture carbon atoms and form 3-dimensional network structure during synthesis. Therefore, they might be able to contribute to upcoming “Carbon-Neutral Society” by reusing carbon waste. In the conventional process for synthesis of these materials, however, a complex process involving time-consuming and multiple re-sintering steps are required. In this study, we have synthesized RB15.5CN/RB22C2N composites via spark plasma sintering utilizing gas/solid reaction technology. This newly developed synthesis technique could facilitate the rapid and cost-effective preparation of environmentally friendly rare earth borocarbonitrides. |