Fabrication of Nd:YAG transparent ceramics using powders synthesized by citrate sol-gel method
Fabrication of Nd:YAG transparent ceramics using powders synthesized by citrate sol-gel method
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柠檬酸盐溶胶-凝胶法合成粉末制备Nd:YAG透明陶瓷
DOI：
10.1016/j.jallcom.2018.09.184
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发表时间：
2019-01
影响因子：
6.2
通讯作者：
Kang Bin
中科院分区：
文献类型：
--
作者：
Yu Shengquan;Jing Wei;Tang Mingjing;Xu Tao;Yin Wenlong;Kang Bin
采用柠檬酸盐溶胶-凝胶法合成粉体制备了高透明Nd:YAG陶瓷。柠檬酸盐溶胶-凝胶法可以避免固相反应法和液相共沉淀法制备(Nd3+,Y3+):Al3+=3:5的Nd:YAG陶瓷粉末的缺陷。干燥后的凝胶为三维网状多孔结构。当干燥的凝胶在500°C的氧气中煅烧时，直接形成纯YAG相，没有中间相。在800℃下煅烧的Nd:YAG粉末的最大粒径接近500nm。这些粉末不是等轴的，有哑铃状和环形颗粒。高度致密的Nd:YAG陶瓷可以在真空气氛中在1750℃下良好地烧结12h，并且这些样品的平均晶粒尺寸约为3.8μm。抛光后的Nd:YAG陶瓷透明度高，在1064nm和400nm处的透过率分别为83.4%和74.2%。荧光发射光谱表明通过808nm泵浦实现1064nm激光输出的可能性很大。一般来说，柠檬酸盐溶胶-凝胶法也是制备高质量Nd:YAG透明陶瓷的可靠选择。
The highly transparent Nd:YAG ceramics were prepared by using powders synthesized by citrate sol-gel method. The citrate sol-gel method could avoid defects of the solid-phase reaction method and the liquid phase co-precipitation method in preparing Nd:YAG ceramic powders with the ratio of (Nd3+, Y3+):Al3+equal to 3:5. The dried gel was the three dimensional net-shaped porous structure. When the dried gel was calcined at 500 °C in oxygen, pure YAG phase formed directly with no intermediate phases. The Nd:YAG powders calcined at 800 °C had maximum particle size near 500 nm. These powders were not equiaxed and there were dumbbell-like and annular grains. The highly compact Nd:YAG ceramics could be well sintered at 1750 °C for 12 h in vacuum atmosphere, and these sample had the average grain size about 3.8 μm. The polished Nd:YAG ceramics was highly transparent, and the transmittances at 1064 nm and 400 nm were 83.4% and 74.2%, respectively. The fluorescence emission spectrum implied high possibility of realizing laser output at 1064 nm by pumping at 808 nm. Generally, the citrate sol-gel method was also a reliable choice for preparing high quality Nd:YAG transparent ceramics.
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