Bi-Te Bi-Te METHOD FOR MANUFACTURING Bi-Te BASED THERMOELECTRIC MATERIAL WITH CONTROLLED PARTICLE SIZE AND Bi-Te BASED THERMOELECTRIC MATERIAL MANUFACTURED THEREBY

• Main Authors: SON, KYOUNG HYUN, YANG, SEUNG HO, PARK, JAE SOUNG, HWANG, BYUNG JIN, CHOI, JONG IL, YEON, BYEONG HOON, KIM, JONG BAE
• Format: Patent
• Language: English; Korean
• Published: 03.08.2018
• Subjects: ELECTRICITY

The present invention relates to a method for manufacturing a Bi-Te based thermoelectric material and, more specifically, to a novel method of improving thermoelectric properties by decreasing thermal conductivity through grain size control and maintaining high Seebeck coefficient and electric conductivity by uniformly pulverizing a metal ribbon, formed through rapid solidification (RSP), into particles through planetary mill, which is high energy milling, under inert atmosphere and sintering the particles. The method comprises the following steps: (i) dissolving and coagulating a raw material for a thermoelectric material containing a Bi raw material and a Te raw material to form a parent alloy; (ii) forming a metal ribbon through rapid cooling of the parent alloy; (iii) milling the metal ribbon to an average particle size (d50) of 20 μm or less by a planetary mill under inert atmosphere; and (iv) compressing the pulverized material to form a preform and pressing and sintering the preform. 본 발명은 Bi-Te계 열전재료의 제조방법에 관한 것으로, 보다 상세하게는 급속응고(RSP)를 통해 형성된 금속 리본을 비활성 분위기 하에서 고에너지 밀링인 유성밀링(planetary mill)를 통해 미립자 형태로 균일하게 분쇄한 후 소결함으로써, 입도 제어를 통해 열전도도 감소, 높은 제벡계수 및 전기전도도를 유지하여 열전 특성을 향상시킬 수 있는 신규 제조방법을 제공한다.