晶界的这种可逆反应十分明显。
The reversible reaction appeared on grain boundary surface quite markedly.
CFO与钆掺杂氧化铈(GDC)晶界处多余的钆发生反应形成了第三种相成分，我们发现这种新相可以作为一种很好的氧离子导电体。
The CFO reacts with the excess GD present in the grain boundary of GDC to form a third phase. It was found that this new phase could also serve as an excellent oxygen ionic conductor.
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