采用冷压-烧结技术制备了CaO掺杂的17Ni/(10NiO-NiFe2O4)金属陶瓷惰性阳极.研究了CaO的添加量和烧结温度对17Ni/(10NiO-NiFe2O4)金属陶瓷的物相组成、致密度和力学性能的影响.结果表明,CaO含量在小于5.0 wt%范围内,烧结样品由Ni、NiO和NiFe2O4组成.CaO掺杂对17Ni/(10NiO-NiFe2O4)金属陶瓷具有明显的助烧作用.当烧结温度为1250℃时,CaO掺杂量为1.0 wt%的样品致密度达到最大值97.87%,继续增加CaO掺杂量将导致材料致密度的下降.当烧结温度从1250℃提高到1350℃时,当CaO掺杂量小于0.5 wt%时,样品的致密度随烧结温度的提高而增加;当CaO掺杂量大于或等于0.5 wt%时,样品的致密度随烧结温度的提高而降低.提高烧结温度和添加CaO均能促进陶瓷相晶粒长大.样品在1250℃烧结时,其抗弯强度在CaO掺杂量为1.0 wt%时达到极大值为150.66 MPa.
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