| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Ceramic-based Materials: Process Development, Materials, Process Optimization and Applications
|
| Presentation Title |
A-15: Rheological Study of 3D Printable All-inorganic Thermoelectric Inks for Direct Writing of Micro-thermoelectric Generator |
| Author(s) |
Han Gi Chae |
| On-Site Speaker (Planned) |
Han Gi Chae |
| Abstract Scope |
To improve the performance and efficiency of the TE generator, 3d printing methods for TE materials are applied to create suitable geometries for heat sources. In this study, to attain high-quality 3D printing of TE inorganic materials, inorganic ionic binders have been used to achieve mild viscoelasticity in colloidal inks and perform layer-wise deposition of 3D TE structures without any degradation of TE performance. We analyzed the rheological properties of the BiTe-based TE inorganic inks to evaluate printability, thixotropy, and structure shape retention after printing regarding the properties of TE particles and binders to include the strong electrostatic interactions by various and comprehensive rheological analysis such as structural deformation parameters via three-interval thixotropy test (3ITT). The optimized printing inks can be directly written into complex architectures having a high aspect ratio. These printed micro-thermoelectric generators have exhibited large temperature gradients and a power density of 479.0 μW cm–2. |