硅藻土具有无数的小孔和复孔，其孔隙率为80-90%，这就为截留固体颗粒提供了较大的空间。

With countless holes diatomite and complex hole, its pore rate for 80-90%, this is the intercept solid particles provide larger space.

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结果表明：微孔阴极中的颗粒连通性好、颗粒尺寸小以及孔隙率高都有利于电脱氧的进行。

The results show that small particle size, good connectivity among particles and high porosity of the cathode enhance the rate of electro-deoxidation.

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多孔铝合金的孔隙率梯度主要是由渗流驱动压力梯度与凝固顺序所决定，而颗粒的自然堆积密度影响相对较小。

The porosity gradient of porous aluminium is mostly affected not only by the spontaneous stacking density of granules, but also by the infiltration pressure gradient and solidification sequence.

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