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发明公开
CN101736172A 一种SiGe合金热电材料的制备方法 失效 - 权利终止

一种SiGe合金热电材料的制备方法
摘要：
本发明涉及一种SiGe合金热电材料的制备方法。一种SiGe合金热电材料的制备方法，其特征在于它包括如下步骤：1)以高纯Si块、高纯Ge块和掺杂物为原料，按化学式Si80Ge20X0～3称重，化学式中X表示掺杂物的元素；将高纯Si块、高纯Ge块和掺杂物混合后，在氩电弧熔融炉中熔融2～3次，每次30s，得到合金块体；2)将步骤1)中得到的合金块体碾磨破碎，然后以酒精为球磨工艺控制剂在球磨机中球磨1～2h，干燥后得到合金粉末；3)对步骤2)中得到的合金粉末进行放电等离子烧结，得到致密、块体的SiGe合金热电材料。本发明工艺简单、制备时间短，工艺参数容易控制，所制备的材料性能高。
摘要（英）：

The invention relates to a preparation method of a SiGe alloy thermoelectric material. The preparation method of the SiGe alloy thermoelectric material is characterized by comprising the following steps of: (1) weighing high-purity Si blocks, high-purity Ge blocks and dopants as raw materials according to a chemical formula Si80Ge20X0-3, wherein X in the chemical formula stands for elements of the dopants; mixing the high-purity Si blocks, the high-purity Ge blocks and the dopants, then melting for 2 to 3 times with 30s each time in an argon arc melting furnace to obtain an alloy block body; (2) grinding and crushing the alloy block body obtained in the step (1), then ball-milling for 1 to 2h in a ball mill by taking alcohol as a ball-milling process controlling agent, and drying to obtain alloy powder; and (3) carrying out electro-discharging plasma sintering on the alloy powder obtained in the step (2) to obtain compact and blocky SiGe alloy thermoelectric material. The invention has the advantages of simple process, short preparation time, easily-controlled process parameters and high performance of the prepared material.

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