K7[CrCa(OH2)W11O39] was synthesized by a direct method and thermal diffusing permeation of Gd to the sample was studied with the solid-gas interface reaction.

• 经我们的研究证明[9-14],采用稀土热扩渗的方法,不仅提高了样品的稳定性,而且其导电能力显著提高,扩大了应用范围。