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采用直接烧结法制备了Caβ~(?)-Al_2O_3固体电解质。为了与用离子交换法从Naβ~(?)-Al_2O_3得到的Caβ~(?)-Al_2O_3比较,采用交流阻抗谱图法测定了576—1028K的离子电导率及电导活化能;用Wagner非对称极化技术测定了834—920K的电子电导及电导活化能。最后由所测数据计算了离子迁移数。 实验结果表明,直接合成的多晶Caβ~(?)-Al_2O_3,同用离子交换法制成的多晶Caβ~(?)-Al_2O_3一样,具有优良的性能。本测量结果为多晶Caβ~(?)-Al_2O_3的应用提供了必要的数据。
The Caβ ~ (?) - Al_2O_3 solid electrolyte was prepared by direct sintering method. In order to compare with Caβ ~ (?) - Al_2O_3 obtained from Naβ ~ (?) - Al_2O_3 by ion exchange method, the ionic conductivity and conductance activation energy of 576-1028K were measured by AC impedance spectroscopy. The Wagner asymmetric electrode The technique has been used to determine the electronic and conductivity activation energies of 834-920K. Finally, the measured data calculated the number of ion transport. The experimental results show that the directly synthesized polycrystalline Caβ ~ (?) - Al_2O_3 has the same excellent properties as the polycrystalline Caβ ~ (?) - Al_2O_3 prepared by ion exchange method. The results provide the necessary data for the application of polycrystalline Caβ ~ (?) - Al_2O_3.