Cation-substitution induced stable GGAG:Ce3+ ceramics with improved optical and scintillation properties
Cation-substitution induced stable GGAG:Ce3+ ceramics with improved optical and scintillation properties
复制标题
DOI：
10.1016/j.jeurceramsoc.2017.06.009
复制
发表时间：
2017-12
影响因子：
5.7
通讯作者：
Ji-Yun Zhang;Zhaohua Luo;Yongfu Liu;Hao-chuan Jiang;Jun Jiang;Guoqiang Liu;Jingxian Zhang;
中科院分区：
文献类型：
--
作者：
Ji-Yun Zhang;Zhaohua Luo;Yongfu Liu;Hao-chuan Jiang;Jun Jiang;Guoqiang Liu;Jingxian Zhang;
在铝酸盐石榴石材料中，掺Ce的Gd-Ga-Al-石榴石陶瓷(GGAG：Ce)显示出巨大的性能优势，在医学成像、高能射线探测和大功率LED照明等方面具有广阔的应用前景。本工作的目的是通过Y3+的部分取代来提高GGAG：Ce的热稳定性，并找出晶体结构与光学性质之间的关系。采用化学沉淀法、氧气氛烧结和热等静压相结合的方法制备了GGAG：Ce3+，xY3+陶瓷。为了确定详细的晶体结构信息，首先对X射线衍射谱进行了Rietveld修正。晶体结构的改进验证了Y和Ga原子在十二面体和八面体位置之间相互取代的能力。研究了它的光学、发光和闪烁特性。结果表明，样品在发射峰值波长处的透过率可达77%，光谱校正光产生值达到61,000±11,200个光子/MeV。
Among the aluminate garnet materials, cerium doped gadolinium gallium aluminum garnet ceramics (GGAG:Ce) have shown great performance advantages, which suggests their promising applications in medical imaging, high energy rays detection and high power LED lighting. The goal of this work is to raise the thermostability of GGAG:Ce by means of partial Y3+substitution, and to find out the relationship between the crystal structure and the optical properties. GGAG:Ce3+,xY3+ceramics were prepared via chemical precipitation, and a combination of sintering in oxygen atmosphere and hot isostatic pressing. In order to identify the detailed crystal structure information, Rietveld refinements were first taken on the XRD patterns. Crystal structure refinements verify the ability of mutual substitution of Y and Ga atoms between the dodecahedron and octahedral sites. The optical, luminescent and scintillation properties have been investigated. Results show that the transmittance of the sample can reach 77% at the emission peak wavelength, while the spectrally corrected light yield value reaches 61,000 ± 1200 photons/MeV.