Preparation of undoped and Tb3+-doped fluorescent HfO2 spherical particles
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- SANADA Tomoe
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University
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- KAWAI Masashi
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University
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- NAKASHITA Hiroshi
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University
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- MATSUMOTO Taichi
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University
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- WADA Noriyuki
- Department of Materials Science and Engineering, Suzuka National College of Technology
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- KOJIMA Kazuo
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University
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説明
Undoped and Tb3+-doped HfO2 spherical particles were prepared by a sol-gel method, by using hafnium tetra-t-butoxide (Hf(O-t-C4H9)4) as a precursor of hafnium dioxide, SPAN85® as a surfactant, mixed solvent of C2H5OH and n-C4H9OH, and H2O, followed by investigation of their structural and optical properties. Spherical particles with good morphology and comparatively high dispersibility were obtained from solutions with the molar ratio SPAN85®:H2O = 1:8-17.5, their sizes being 0.2-5 μm in diameter. Particles became small and aggregated when the molar ratio of H2O was more than 17.5, but became large when it was less than 8. Spherical particles heat treated at 400°C or below were amorphous, and those heat treated at 600°C or above were crystallized. Tb3+-doped HfO2 spherical particles showed green luminescence due to the 5D4→7FJ (J = 6, 5, 4, 3) transitions of the Tb3+ ion, and relatively strong luminescence was observed both in dried gel particles and particles heat treated at 1000°C. These Tb3+-doped HfO2 spherical particles can be expected for new optical materials.
収録刊行物
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 116 (1360), 1265-1269, 2008
公益社団法人 日本セラミックス協会
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詳細情報 詳細情報について
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- CRID
- 1390282680260699648
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- NII論文ID
- 110007007489
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- NII書誌ID
- AA12229489
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- ISSN
- 13486535
- 18820743
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- NDL書誌ID
- 9721828
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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