(浙江大學(xué) 材料系硅材料國(guó)家重點(diǎn)實(shí)驗(yàn)室, 杭州 310027)
摘 要: 用懸浮熔煉法制備了含Sm、 Mn的P型FeSi2基熱電材料。 實(shí)驗(yàn)結(jié)果表明, 其電學(xué)性能是由摻雜的兩種元素共同決定的, Sm對(duì)降低樣品電阻率的作用較大, 而Mn有助于提高樣品的熱電動(dòng)勢(shì)率。 要保證有較高功率因子, Mn、 Sm摻雜總摩爾分?jǐn)?shù)應(yīng)小于5%, 而Mn的最佳摻雜摩爾分?jǐn)?shù)在1.7%左右。
關(guān)鍵字: Sm； FeSi2； 熱電材料； 功率因子
based thermoelectric materials
doped with Sm and Mn
（State Key Laboratory of Silicon Materials,
Department of Materials Science and Engineering，
Zhejiang University, Hangzhou 310027, China）
Abstract:The P-type Fe1-x-ySmxMnySi2 thermoelectric materials were prepared by levitation melting. The experimental results show that, the electrical properties of the P-type Fe1-x-ySmxMnySi2 alloys are determined by the sum of samarium and manganese contents; the samarium has good effect on the electrical resistivity decreasing, while the manganese can improve Seebeck coefficient for P-type
Fe1-x-ySmxMnySi2. It is necessary to attain a higher power factor that the manganese content in mole fraction should be 1.7% or so and the sum dopant content is less than 5%.
Key words: Sm; FeSi2; thermoelectric material; power factor
