Synthesis of ZrB2 Powders by Carbothermal and Borothermal Reduction.

The synthesis methods of ZrB2 powders using ZrO2 + B2O3 + C (carbothermal reduction), ZrO2 + B4C (boron carbide reduction), and ZrO2 + B4C + C (combined reduction) at 1250 °C for 1—3 h under flowing Ar are compared.