通过对两元p-型梯度热电材料FeSi2/Bi2Te3界面温度的建模计算与实验验证, 在固定热冷端温区内积分得出的Z-ΔT 值与界面温度Ti的关系曲线为:Z-ΔT=0.672+11.7×10-4Ti-1.31×10-6T 2i-3.49×10-9T3i该关系可用来表征两元梯度结构的热电性能. 从拟合曲线上得出该梯度结构的最佳界面温度为220℃～230℃, 这与实验测出两单段材料(FeSi2, Bi2Te3)长度比为10∶1左右时所形成的界面温度较为接近. 通过测试不同长度比的材料输出功率, 也发现10∶1梯度材料的最大输出功率较大, 是相同温差下单段β-FeSi2材料的2倍～2.6倍.
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