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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

固相反应法制备 Ce:LuAG透明陶瓷

李会利1,2, 刘学建1, 黄莉萍1   

  1. 1. 中国科学院上海硅酸盐研究所结构中心, 上海 200050; 2. 中国科学院研究生院, 北京 100049
  • 收稿日期:2005-11-03 修回日期:2005-12-06 出版日期:2006-09-20 网络出版日期:2006-09-20

Fabrication of Transparent Ce: LuAG Ceramics by a Solid-state Reaction Method

LI Hui-Li 1,2, LIU Xue-Jian 1, HUANG Li-Ping1   

  1. 1. Shanghai Institute of Ceramics, Chinese Academy of Sciences,
    Shanghai 200050, China; 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2005-11-03 Revised:2005-12-06 Published:2006-09-20 Online:2006-09-20

PDF (PC)

2077

被引次数

61

摘要： 以Lu(NO3)3和NH4HCO3为原料, 采用沉淀法制备了平均粒径约为40nm的Lu2O3粉体, 以该粉体和市售的Al2O3、CeO2超细粉体为原料, 采用固相反应工艺, 经1760℃真空烧结10h, 制备出透明的Ce:LuAG陶瓷, 该透明陶瓷在可见光范围内的透过率为56%, X射线激发下的发射光谱为Ce3+的特征发射, 范围在470~650nm, 和同类单晶的光谱一致, 正好在硅光电二极管的高敏感曲线范围内, 满足于闪烁体的性能要求, 是一种有应用前景的闪烁材料.

关键词: LuAG, 透明陶瓷, 固相反应, 发射光谱

Abstract: Lu2O3 powders with an average particle size of about 40nm were produced by a precipitation methed using Lu (NO3)3 and NH4HCO3 as starting materials. The precipitation precursor is amorphous and transforms into pure Lu2O3 phase by calcining at 600℃ for 2h. The resultant Lu2O3, Al2O3 and CeO2 powders were mixed by ball milling, and then sintered into a fully transparent Ce:LuAG ceramic body by vacuum sintering at 1760℃ for 10h and annealed at 1450℃ for 20h. The resultant transparent ceramic has a uniform microstructure with an average grain size of about 4μm. The polished Ce:LuAG ceramic disk with 1.2mm
thickness is highly transparent. The transmittance in the visible region reaches 56%, which is 72% of the theoretical value. The emission spectrum at 470~650nm with the double peak structure (517nm and 552nm) excited by
X-ray is the characteristic spectrum of Ce3+ due to the 5d-4f transition, is consistent with that of LuAG:Ce single crystals, well coupled with the silicon photodiodes and satisfies the property requirements of a scintillator. Ce:LuAG transparent ceramics is a promising scintillating material.

Key words: LuAG, transparent ceramics, solid-state reaction, emission spectrum

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