3.8 Article

Synthesis of Boron Carbide Powder via Rapid Carbothermal Reduction Using Boric Acid and Carbonizing Binder

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Preparation and Characterization of B4C-HfB2 Composites as Material for High-Temperature Thermocouples

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Summary: Boron carbide is a material with high thermoelectric power that can be used in thermoelectric applications. In this study, boron carbide and hafnium boride composites were prepared by pressureless sintering of B4C and HfC powders, and the effect of HfC addition on the sinterability and thermoelectric properties was investigated. The results showed that the addition of HfC decreased the Seebeck coefficient and increased the electrical conductivity, leading to a change in conduction behavior from semiconducting to metallic mechanism. The functional thermocouples based on the prepared composites showed potential for temperature measurement applications.

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