Ink Casting and 3D‐Extrusion Printing of Yb14MnSb11 for High‐Temperature Thermoelectric Material,Advanced Functional Materials

当前位置： X-MOL 学术 › Adv. Funct. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Ink Casting and 3D‐Extrusion Printing of Yb14MnSb11 for High‐Temperature Thermoelectric Material
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-12-20 , DOI: 10.1002/adfm.202415210
Ming Chen, Alex Pröschel, Kurt E. Star, Sabah K. Bux, G. Jeffrey Snyder, David C. Dunand

Complex shapes are created from Yb14MnSb11, a high‐temperature thermoelectric Zintl phase, via a two‐step process: i) layer‐by‐layer 3D‐extrusion of ink containing partially‐reacted powders which are ball‐milled from a blend of Yb, MnSb, and Sb powders; ii) heat treatment to synthesize the ternary compound Yb14MnSb11 and densify the extruded powders. A high phase purity for Yb14MnSb11 (83–94%) is achieved in both cast and 3D‐extruded ink specimens via a solid‐state reaction between Yb, MnSb, and Yb4Sb3 during reactive sintering. Pressure‐free sintering at temperatures of 1200–1400 °C densifies the powders to 82% relative density but can also induce the decomposition of the Yb14MnSb11 phase due to Yb sublimation. A process window with optimized sintering temperature and time is identified, achieving both low porosity and high phase purity and reaching a maximum zT = 0.61 at 1000 °C, about half of the maximum zT value for bulk Yb14MnSb11 made via conventional processes (pressure sintering of precursor powders). The present approach – direct ink writing of ball‐milled powders, combined with reactive sintering – is a scalable and affordable method to fabricate thermoelectric legs with intricate 3D shapes, for enhanced performances in high‐temperature thermoelectric applications.

更新日期：2024-12-20

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南