通过掺杂不同浓度Tb2O3的重稀土氧化物,研究不同烧结温度下二元MgO-Tb2O3对氧化铝陶瓷电弧管组织与性能的影响,并与MgO-CaO掺杂体系进行比较.结果表明:在相同工艺条件下,CaO掺杂样品晶粒组织粗大且分布不均匀;添加重稀土氧化物Tb2O3可降低氧化铝陶瓷电弧管的晶体颗粒尺寸;在较低烧结温度下,掺杂Tb2O3能够细化晶粒、提高微观组织均匀性、消除晶粒异常生长及有效地改善透明氧化铝陶瓷电弧管的力学性能.
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