산화물 환원공정에 의한 Bi-Sb-Te계 열전분말 합성
Synthesis of Bi-Sb-Te-based Thermoelectric Powder by an Oxide-reduction Process
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The present study focused on the synthesis of Bi-Sb-Te-based thermoelectric powder by an oxidereduction process. The phase structure, particle size of the synthesized powders were analyzed using XRD and SEM. The synthesized powder was sintered by the spark plasma sintering method. The thermoelectric property of the sintered body was evaluated by measuring the Seebeck coefficient and specific electric resistivity. The Bi0.5Sb1.5Te3 powder had been synthesized by a combination of mechanical milling, calcination and reduction processes using mixture of Bi2O3, Sb2O3 and TeO2 powders. The sintered body of the Bi0.5Sb1.5Te3 powder synthesized by an oxide-reduction process showed p-type thermoelectric characteristics, even though it had lower thermoelectric properties than the sintered body of the Bi0.5Sb1.5Te3 thermoelectric powder synthesized by the conventional melting-crushing method.
Abstract
The present study focused on the synthesis of Bi-Sb-Te-based thermoelectric powder by an oxidereduction process. The phase structure, particle size of the synthesized powders were analyzed using XRD and SEM. The synthesized powder was sintered by the spark plasma sintering method. The thermoelectric property of the sintered body was evaluated by measuring the Seebeck coefficient and specific electric resistivity. The Bi0.5Sb1.5Te3 powder had been synthesized by a combination of mechanical milling, calcination and reduction processes using mixture of Bi2O3, Sb2O3 and TeO2 powders. The sintered body of the Bi0.5Sb1.5Te3 powder synthesized by an oxide-reduction process showed p-type thermoelectric characteristics, even though it had lower thermoelectric properties than the sintered body of the Bi0.5Sb1.5Te3 thermoelectric powder synthesized by the conventional melting-crushing method.
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