Electronic Quality Factor and Universal Electrical Conductivity of Thermoelectric 〖Bi〗_2 〖Sr〗_(2-x) 〖[Sr(BO_2 )_2 ]_x Co〗_(1.8) O_y

Abstract

The electronic suitability factor (B E ) and universal electrical conductivity (σ') of thermoelectric material 𝐵𝑖 2 𝑆𝑟 2−𝑥 [𝑆𝑟(𝐵𝑂 2 ) 2 ] 𝑥 𝐶𝑜 1.8 𝑂 𝑦 are discussed in the article. The data on B E − T, B E − S, σ ′ − T, σ ′ − σ, S − σ ′ and B E − σ ′ dependences, where T is the absolute temperature, S is the Seebeck coefficient, and σ-specific electrical conductivity, are given. It is shown that the doping of cobaltite 𝐵𝑖 2 𝑆𝑟 2 𝐶𝑜 1.8 𝑂 𝑦 with 𝑆𝑟(𝐵𝑂 2 ) 2 does not affect the σ' -Т and S-σ' dependences, which is determined by the parameter B E factor.