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在金属或合金材料中,由于热电效应的存在,温度梯度▽T可产生相应的电场E=S▽T(1)其中S为该材料的绝对热电势。电子扩散过程
In metals or alloys, the temperature gradient ∇ T produces a corresponding electric field, E = S ▽ T (1), where S is the absolute thermoelectric potential of the material due to the pyroelectric effect. Electronic diffusion process