Abstract: Barium gallogermanate transparent glass ceramics were fabricated by crystallization processes, and their infrared and mechanical properties were studied in this paper. It was found that only ZrO2 crystal formed when barium gallogermanate mother glass was treated at 810-910℃ for 0.5 h. A few ZrO2 crystals with size of less than 10 nm appeared if mother glass was treated at 830℃. The average size of ZrO2 crystals separated was 250 nm when treatment temperature was up to 870℃. However, ZrO2 crystals would be large and congregated if treatment temperature was higher than 870℃. Barium gallogermanate transparent glass ceramics possessed excellent infrared and mechanical properties when mother glasses were treated at 810-850℃. When treatment temperature was up to 870℃, the mechanical properties of barium gallogermanate glass ceramics was better, but it was regretful that their infrared properties decrease. If treatment temperature increaseed, both infrared properties and mechanical properties of barium gallogermanate glass ceramics would decrease.