Luminescent Eu3+-doped transparent alumina ceramics with high hardness
Luminescent Eu3+-doped transparent alumina ceramics with high hardness
复制标题
发光高硬度Eu3掺杂透明氧化铝陶瓷
DOI：
10.1016/j.jeurceramsoc.2017.05.007
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发表时间：
2017
影响因子：
5.7
通讯作者：
K. Maca
中科院分区：
文献类型：
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作者：
K. Drdlíková;R. Klement;H. Hadraba;D. Drdlík;D. Galusek;K. Maca
采用湿法成型、无压烧结和热等静压工艺制备了掺Eu 3+的透明氧化铝。研究了掺杂量对薄膜微观结构、真实的在线透射率（RIT）、光致发光（PL）性能、硬度和断裂行为的影响。RIT随着掺杂剂量的增加而降低。Al_2O_3：Eu ~（3+）陶瓷的PL发射光谱显示出以红光为主的发光，在394 nm激发下，当Al_2O_3：Eu ~（3+）含量为0.125 at.%时，发光强度最高的Eu 3+和色坐标（0.645，0.355）与商业红色荧光粉。掺杂导致硬度从未掺杂氧化铝的26.1 GPa增加到Eu掺杂样品的27.6 GPa。断口分析表明，裂纹扩展的微观机制以沿晶为主。
The Eu3+-doped transparent aluminas were prepared by wet shaping technique followed by pressure-less sintering and hot isostatic pressing. The effect of dopant amount on microstructure, real in-line transmission (RIT), photoluminescence (PL) properties, hardness and fracture behaviour was studied. The RIT decreased with increasing amount of the dopant. The PL emission spectra of Al2O3:Eu3+ceramics exhibited predominant red light emission with the highest intensity (under 394 nm excitation) for material containing 0.125 at.% of Eu3+and colour coordinates (0.645, 0.355) comparable with commercial red phosphors. The doping resulted in hardness increase from 26.1 GPa for undoped alumina to 27.6 GPa for Eu-doped sample. The study of fracture surfaces showed predominantly intergranular crack propagation micro-mechanism.