A new realization route of Al-2(WO4)(3)-Ln(2)(WO4)(3) (Ln = Lu, Eu) solid solution single crystals by electrochemical ion doping

Trivalent rare earth cations (Lu3+ and Eu3+) were electrochemically doped i nto Al-2(WO4)(3) single-crystal grain bulk and single-crystal solid solutio ns of Al-2(WO4)(3)-Ln(2)(WO4)(3) (Ln = Lu, Eu) were successfully prepared. The ionic conductivity was increased by Lu or Eu doping into the single cry stal by forming a solid solution. The outstanding feature of the present el ectrolysis procedure is that new types of solid solution single crystal wer e artificially prepared, whose solution solid cannot be obtained by a conve ntional polycrystalline solid solution preparation method due to the large ionic radius difference in the two trivalent ion species. (C) 1999 The Elec trochemical Society. S1099-0062(99)07-057-0. All rights reserved.