通过真空合成和热压烧结制备了p型(Bi0.5Sb0.5)2(Te1-ySey)3+2%Te(质量分数)(y=0.02~0.03),针对不同y值的样品利用XRD、SEM对其进行成分分析、物相结构和形态的分析,通过四探针法测量其电导率,对样品两端加温差(ΔT=1~4℃)测量其塞贝克系数。结果表明,当y=0.022时,材料具有最好的热电性能:σ=83.78Ω-1·mm-1,α=228μV·K-1,P=3.9808mW·m-1·K-2。 P (Bi 0.5 Sb 0.5) 2 (Te 1-ySey) 3 + 2% Te (mass fraction) was prepared by vacuum synthesis and hot pressing sintering (y = 0.02-0.03). The samples with different values ​​of y were characterized by XRD, SEM was used to analyze its composition, phase structure and morphology. The four-probe method was used to measure the conductivity of the sample. The Seebeck coefficient of each sample was measured by temperature difference (ΔT = 1-4 ℃). The results show that when y = 0.022, the material has the best thermoelectric properties: σ = 83.78Ω-1 · mm-1, α = 228μV · K-1 and P = 3.9808mW · m-1 · K-2.