通过MgAl2O4-α-Al2O3复合相陶瓷基体与Li2O、Na2O气氛的反应制备了Li2O和MgO共同稳定的Naβ／β″-Al2O3膜．相分析的结果表明，反应温度是决定膜中Naβ／β″Al2O3相形成速率的主要因素，当温度低于1100℃时，。α-Al2O3基体不能转化为β／β″-Al2O3。基体中的MgAl2O4可以促进膜的形成，并降低膜的形成温度.交流复阻抗谱和四极法测量的结果表明，复合基体表面形成的β／β″-Al2O3膜具有良好的离子导电性，但其中少量第二相MgAl2O4的存在会使电导率有所降低，同时电导活化能相应增大.
Lithium and magnesium co-stabilized β/β’’-Al2O3 films were fabricated by the reaction between the spinel-α-Al2O3
composite substrate and the vapour of Li2O and Na2O. The experimental results show that temperature is the main factor determining the forming
rate of the β/β’’-Al2O3 phases which cannot be obtained when the reaction taking place at below 1100℃. Dispersive spinel in the substrate can improve effectively the formation of β/β’’-Al2O3 phases even at
lower temperatures. The films obtained on composite substrate exhibit favorable electrical properties which are comparable to that of
β/β’’-Al2O3 ceramics, although a little spinel remained in the film to some extent reduce the ionic conductivity and at the same time
increase the activation energy of the film.
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