About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Topological Engineering of 3D Nanomaterial Networks Via Binder Jetting for High-Temperature Thermoelectrics |
| Author(s) |
Je-Hyeong Bahk, Nilesh Raut, Ardalan Soleymani Ashtiani |
| On-Site Speaker (Planned) |
Je-Hyeong Bahk |
| Abstract Scope |
Developing high-temperature thermoelectric ceramics requires simultaneous optimization of electrical conductance and thermal resistance. This work utilizes Binder-Jet Additive Manufacturing (BJAM) to engineer continuous 3D percolating networks of conductive nanomaterials within refractory ceramic matrices. By selectively depositing nanomaterial-dispersed inks into ceramic powder beds, we create hierarchical composites where the 3D network architecture governs charge transport.
We investigate the network topology—specifically tortuosity and junction density—and its dependence on printing resolution and binder saturation. Unlike bulk-mixed composites, BJAM enables templated networks that follow the powder bed’s interstitial geometry. We present findings on electron tunneling kinetics at nanomaterial junctions and the role of the 3D architecture in enhancing the power factor. By maintaining low lattice thermal conductivity through selective phonon scattering at heterostructure interfaces, this scalable approach enables the direct printing of complex functional circuits for robust, high-efficiency thermoelectric generators. |