ZHENG Shuqi,　WANG Haimei,　HAN Jiande,　MIN Guanghui,　ZOU Zengda,　YU Huashun,　WANG Weiti

（Shandong University‚∗Qindao Science and Techndog University）

Abstract: The reaction synthesis of BaB₆ ceramic powder was studied systematically in this paper．X－ray diffraction and scanning electron microscopy analysis show that interaction in the BaCO₃－B₄C－C system intended to barium hexaboride formation belongs to solid phase processes and passes through the stages of transition phases Ba₂B₂O₅、BaB₂O₄ formation etc．The optimal technology of barium hexaboride synthesis is holding time of2h at 1673K under10^－2 Pa vacuums．The shape of B₄C powder decide that of BaB₆‚and the properties and shape of BaB₆ powder can be improved by choosing good raw materials．

Keywords: BaB₆‚reaction synthesis‚formation mechanism