Synthesis of LaB6–ZrB2 Powder Mixture by Borothermal Reduction of La(OH)3 and ZrO(OH)2 Coprecipitated in Boron Suspension

Аннотация

Eutectic LaB₆–ZrB₂ powder was synthesized by borothermal reduction of an La(OH)₃–ZrO(OH)₂ mixture under vacuum with isothermal curing at 1200 – 1600°C. The mixture of hydroxides was prepared via coprecipitation from aqueous solutions of La and Zr nitrates in a suspension of amorphous boron. The effect of an excess of B on the phase and elemental compositions of the boride mixture was studied. The particle size of the obtained powders depended on the synthesis temperature.