Fig. 1 shows crystal structure of cubic garnet-type Li7La3Zr2O12 (LLZO, left) and temperature dependence of ionic conductivity for Ba- and Ta-substituted LLZO with different compositions.

Although the optically transparent single-crystal ZrO 2 form has a very high thermal shock resistance, it also has poor fracture toughness and strength. Zirconia is well-known among ceramics for being ...