Growth and luminescence properties of Eu-doped HfO2/α-Al2O3 eutectic scintillator
来源期刊：JOURNAL OF RARE EARTHS2016年第8期
论文作者：Kei Kamada Kosuke Hishinuma Shunsuke Kurosawa Akihiro Yamaji Yasuhiro Shoji Jan Pejchal Yuji Ohashi Yuui Yokota Akira Yoshikawa
文章页码：796 - 801
摘 要：HfO2/α-Al2O3 eutectics were grown by the micro-pulling down（μ-PD） method at the composition of 63.2 mol.% α-Al2O3, 35.512 mol.% HfO2, 0.92 mol.% Eu2O3 and 0.368 mol.% Y2O3. Rod phases with around 3–4 μm diameter were observed on the transverse cross-section. The phase-separated scintillator fibers（PSSFs） structure with fibers of around 3–4 μm diameter and 10–20 μm length was observed. The electron back scattering patterns indicated crystal orientation of [101] for monoclinic HfO2 rod phase and [0001] for α-Al2O3 matrix in the transverse cross-section. Eu3+ 4f-4f emission was observed at 550–750 nm.
Kei Kamada1,2，Kosuke Hishinuma3，Shunsuke Kurosawa2,3，Akihiro Yamaji3，Yasuhiro Shoji1,3，Jan Pejchal2,4，Yuji Ohashi3，Yuui Yokota1，Akira Yoshikawa1,2,3
1. New Industry Creation Hatchery Center, Tohoku University3. Institute for Material Reseach, Tohoku University4. Institute of Physics AS CR
摘 要：HfO2/α-Al2O3 eutectics were grown by the micro-pulling down（μ-PD） method at the composition of 63.2 mol.% α-Al2O3, 35.512 mol.% HfO2, 0.92 mol.% Eu2O3 and 0.368 mol.% Y2O3. Rod phases with around 3–4 μm diameter were observed on the transverse cross-section. The phase-separated scintillator fibers（PSSFs） structure with fibers of around 3–4 μm diameter and 10–20 μm length was observed. The electron back scattering patterns indicated crystal orientation of [101] for monoclinic HfO2 rod phase and [0001] for α-Al2O3 matrix in the transverse cross-section. Eu3+ 4f-4f emission was observed at 550–750 nm.
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