Fabrication of cerium-doped nonstoichiometric （Ce, Lu, Gd）3＋δ（Ga, Al）5-δO12 transparent ceramics

• Published in: 中国稀土学报：英文版 2015, Vol.33 (8), p.863-866
• Main Author: 陈先强 秦海明 张烨 罗朝华 刘永福 蒋俊 江浩川
• Format: Article
• Language: English
• Subjects: 制备; 掺铈; 透明陶瓷; 非化学计量
• ISSN: 1002-0721; 2509-4963

Cerium-doped nonstoichiometric （Ce,Lu, Gd）3＋δ,（Ga,A1）5-δO12 （LuGGAG） transparent garnet ceramic samples were fabricated via a solid state reaction method in this study. The ceramics were prepared via oxygen sintering followed by hot isostatic pressing （HIP）. The phase and microstructure of the samples were analyzed by X-ray diffraction and scanning electron microscopy （SEM）, respectively. The excitation, emission and transmission spectra were also measured. The total optical transmittance of the annealed LuGGAG ceramics with thickness of 3 mm reached 47% at the emission wavelength of 555 nm. The decay time was about 60 ns. Compact microstructure of polycrystalline grains with scale around 5 μm were gained according to scanning electron microscopy characterization. The successful preparation of the bulk ceramic material and implementation of the combined oxygen sintering-hot isostatie pressing treatment process provided an important method for the exploration of nonstoichiometrie scintillator material.