公开(公告)号：US20160035954A1

公开(公告)日：2016-02-04

申请号：US14445174

申请日：2014-07-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： James R. Salvador ,  Daniel Thompson ,  Chang Liu

IPC: H01L35/18 ,  B22F3/12 ,  B22F9/06

CPC classification number: H01L35/18 ,  B22F2998/10 ,  C22C1/0491 ,  C22C12/00 ,  C22F1/16 ,  B22F9/08 ,  B22F9/04 ,  B22F3/14

Abstract: A method is disclosed for inserting elemental calcium and cerium as low cost fillers in n-type Co4Sb12 type skutterudite compositions for use in thermoelectric applications. It is found that the inclusion of calcium oxide (and to a lesser extent, cerium oxide) in the Co4Sb12 skutterudite compositions, as the filled-crystalline compositions are being made, markedly reduces the thermoelectric properties of the intended calcium-filled crystalline product. A synthesis process, including careful control of melt spinning of a melt of calcium-containing, or calcium and cerium-containing, cobalt and antimony composition, leads to the formation of substantially oxide-free, calcium filled-precursor particles that can be compacted, sintered, and transformed into calcium-filled n-type skutterudite billets that have excellent thermoelectric properties.

Abstract translation: 公开了用于在用于热电应用的n型Co4Sb12型方钴矿组合物中插入元素钙和铈作为低成本填料的方法。 已经发现，作为填充结晶组合物，在Co4Sb12方钴矿组合物中包含氧化钙（和较小程度的氧化铈）显着降低了预期的钙填充结晶产品的热电性能。 包括仔细控制含钙或钙和铈的钴和锑组合物的熔体熔融纺丝的合成方法导致基本上无氧化的钙填充前体颗粒的形成，其可被压实， 烧结并转化为具有优异热电性能的钙填充的n型方钴矿坯料。