In Figure 2 d, an increased value of κ (1.17 Wm −1 K −1 ) was studied for sample SPS−450 °C at 300 K, but a decreasing trend was observed with the measurement temperature from 300 to 500 K.
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Effect of Co-Doping on Thermoelectric Properties of <i>n</i>-Type Bi<sub>2</sub>Te<sub>3</sub> Nanostructures Fabricated Using a Low-Temperature Sol-Gel Method.
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The sentences
The S values for sample BT−350 °C showed an increasing trend (−60 to −76) mV/K with an increase in the temperature ranges from 300 to 500 K, and the same increasing trend for sample BT−400 °C (−107 to −123) mV/K.