钡镓锗透明微晶玻璃的制备及性能

Fabrication and properties of barium gallogermanate transparent glass ceramics

文中通过微晶化工艺制备出钡镓锗透明微晶玻璃，并研究了其透红外性能和力学性能。结果表明，810~910℃热处理0.5 h时，钡镓锗微晶玻璃析出单一ZrO2晶体。处理温度为830℃时，钡镓锗微晶玻璃中开始析出少量ZrO2晶粒，尺寸约几个纳米；处理温度升到870℃时，平均晶粒尺寸为250 nm；晶化温度高于870℃时，晶粒数量显著增多，晶粒粗大，而且发生团聚现象。晶化温度为810~850℃时，可以获得透红外性能和力学性能兼顾的钡镓锗透明微晶玻璃；处理温度为870℃时，钡镓锗微晶玻璃的力学性能出现极值，但透红外性能降低；若继续升高处理温度，钡镓锗微晶玻璃的透红外性能和力学性能均下降。

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.