| 摘要 |
<p>The disclosure relates to new and improved compacted or pressed powder materials for thermoelectric applications. The materials have commercially high figures of merit in desired temperature ranges. Also disclosed is a method for making the materials. The materials include lead telluride and a modifying element which is capable of forming solid phase alloys with tellurium but incapable of forming solid phase alloys with lead. The materials are multiphase materials having at least three phases including lead telluride, a telluride of the modifying element, and the modifying element. The modifying element preferably is manganese forming, during processing, lead telluride, manganese telluride, and manganese phases. The modifying element can also be aluminium, chromium, or titanium. The materials are made in accordance with the general method of the present invention by forming a particulate mixture containing lead telluride and the modifying element. At least a portion of the particulate mixture is then compressed to form a compacted body of the material. Lastly, the compacted body of material is sintered at a temperature between 400 DEG C and 700 DEG C in a forming gas atmosphere and then cooled to room temperature.</p> |
