用氢直流电弧法制备La-LaH2纳米粉末,再采用放电等离子烧结技术,在原位、"无氧"条件下成功制备高纯LaB6多晶纳米块体热阴极材料,并系统研究放电等离子烧结温度、压强对材料物相、结构和性能的影响.结果表明,材料中形成单相的LaB6,纯度达到99.867%,平均晶粒尺寸为120 nm,LaB6纳米块体相对密度达到99.2%,维氏硬度达到17.4 GPa,抗弯强度高达245.6 MPa,己达单晶材料的理论抗弯强度值.
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