引言微孔玻璃气孔率是表征其特征的一个重要物理参数。但是,由于气孔最小孔径只有几十埃,液体介质难以充满孔隙,因此不能用测量陶瓷气孔率的方法来准确测量微孔玻璃的气孔率。压汞测孔仪可以测孔径75000(?)以下的气孔率,但难以测出微孔玻璃的全部气孔率。我们在微孔玻璃的研究过程中,通过两次测量密度的方法较准确地计算出微孔玻璃的气孔率。实验证明,本方法在一般实验条件下是可行的。 Introduction Porous glass porosity is an important physical parameter to characterize its characteristics. However, since the pore size of the pores is only a few tens of angstroms, the liquid medium can hardly fill the pores. Therefore, the porosity of the microporous glass cannot be accurately measured by measuring the porosity of the ceramic. The mercury porosimeter can measure the porosity below 75000 (?), but it is difficult to measure the total porosity of the microporous glass. During the research of microporous glass, we calculated the porosity of microporous glass more accurately by measuring the density twice. Experiments have shown that this method is feasible under general experimental conditions.