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采用质量损失法、碘量滴定法和正电子湮没寿命谱研究了 La_2NiO_(4＋δ)透氧膜的非化学计量，并表征了该材料的氧渗透性能，探讨了 La_2NiO_(4＋δ)的非化学计量缺陷与氧渗透性能之间的关系。研究结果表明， La_2NiO_(4＋δ)的氧渗透通量随δ的增大而增大。
The non-stoichiometry of La_2NiO_ (4 + δ) oxygen permeable membrane was studied by mass loss method, iodometric titration and positron annihilation lifetime spectroscopy. The oxygen permeability of La_2NiO_ (4 + δ) The relationship between oxygen permeability. The results show that the oxygen permeation flux of La_2NiO_ (4 + δ) increases with the increase of δ.