New fabrication of (Y,Gd)2O3:Tb3+ transparent ceramics using ultrafine monospheres
| Project/Area Number |
26420686
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
LI JIGUANG 国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, 主幹研究員 (90354381)
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| Co-Investigator(Renkei-kenkyūsha) |
SAKKA Yoshio 国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, NIMS招聘研究員 (00354217)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 球形微粒子 / 焼結 / 透明セラミック材料 / 光物性 / 透明セラミックス材料 / 均一沈澱 / 塩基性炭酸塩 / 酸化物 / 蛍光特性 / エネルギー移転 |
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| Outline of Final Research Achievements |
Basic carbonate monosheres with the average diameter well controlled in the wide range of 110-590 nm were successfully synthesized via homogeneous precipitation for the Y/Gd/Tb ternary system. (Y0.95-xGdxTb0.05)2O3 ceramics with in-line transmittances reaching 80% were then fabricated via vacuum sintering at 1700 deg C of the well-dispersed oxide particles calcined from such monosheres. Colloidal processing produces denser green bodies of higher microstructure uniformity than CIP. The optimal Gd content was determined to be 2 at% for the 545 nm green-emission of Tb3+. Besides, with layered hydroxide nanosheets as a new type of precursor, single-crystal like transparent ceramics (transmittance: 80-83%) were also fabricated via vacuum sintering at 1700 degC. It was found that a lower heating rate of vacuum sintering produces ceramics of higher transparency. Tb3+ emission improves with increasing crystallite or particle size, and has the fluorescence lifetime of about 1.5-2.8 ms.
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Report
(4 results)
Research Products
(26 results)
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[Journal Article] Hydrothermal crystallization of a Ln2(OH)4SO4.nH2O layered compound for a wide range of Ln (Ln=La-Dy), thermolysis, and facile transformation into oxysulfate and oxysulfide phosphors2017
Author(s)
X.J. Wang, J.-G. Li, M.S. Molokeev, X.J. Wang, W.G. Liu, Q. Zhu, H. Tanaka, K. Suzuta, B.-N. Kim, Y. Sakka
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Journal Title
RSC Advances
Volume: 7
Issue: 22
Pages: 13331-13339
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Sulfate exchange of the nitrate-type layered hydroxide nanosheets of Ln2(OH)5NO3.nH2O for better dispersed and multi-color luminescent Ln2O3 nanophosphors (Ln=Y0.98RE0.02, RE=Pr, Sm, Eu, Tb, Dy, Ho, Er, and Tm)2016
Author(s)
X.L. Wu, W.G. Liu, J.-G. Li, Q. Zhu, X.D. Li, X.D. Sun
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Journal Title
Nanoscale Research Letters
Volume: 11(328)
Issue: 1
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Layered hydroxyl sulfate: Controlled crystallization, structure analysis, and green derivation of multi-color luminescent (La,RE)2O2SO4 and (La,RE)2O2S phosphors (RE=Pr, Sm, Eu, Tb, and Dy)2016
Author(s)
X.J. Wang, J.-G. Li, M.S. Molokeev, Q. Zhu, X.D. Li, X.D. Sun
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Journal Title
Chemical Engineering Journal
Volume: 302
Pages: 577-586
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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