Al3+ ion conducting behavior in single crystal of aluminum tungstate–scandium tungstate solid solution

Single crystal of the aluminum tungstate–scandium tungstate solid solution, which is as large as 1 cm in diameter and 0.6 cm in length, was successfully grown by Czochralski (CZ) method. The crystal is in the Sc2(WO4)3 type structure with an orthorhombic symmetry and the lattice constants of the solid solution increased by the substitution of the larger Sc3+ ion in the Al site of Al2(WO4)3 crystal bulk, showing an isotropic expansion. The Al3+ ion conducting characteristics were characterized and the formation of the Al2(WO4)3–Sc2(WO4)3 solid solution was found to contribute greatly in enhancing the Al3+ ion conducting behaviors, especially along c-axis.