相比控制组，引入1%15纳米的氧化硅可降低孔隙率20.9%，50纳米的

Compared with the control group, the introduction of 1% 15 nanometer silicon oxide can reduce the porosity by 20.9%, 50 nanometer silicon oxide can reduce the porosity of the specimen by 14.6%, and 100 nanometer silicon oxide can reduce the porosity of the specimen by 6.5%.

Compared with the control group, the introduction of 1%15 nm silicon oxide can reduce the porosity rate by 20.9%, the 50 nm silicon oxide can reduce the porosity rate of 14.6% of the test piece, and the 100 nm silicon oxide can reduce the porosity rate of the test piece by 6.5%.

Compared with the control group, the porosity can be reduced by 20.9% by introducing 1% 15nm SiO2, 14.6% by using 50nm SiO2, and 6.5% by using 100nm SiO2.<br>