2007 Fiscal Year Final Research Report Summary
Synthesis of novel alkaline-earth silicon nitrides and evaluation from the viewpoint of materials science
| Project/Area Number |
17560599
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Sophia University |
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Principal Investigator |
ITATANI Kiyoshi Sophia University, FACULTY OF SCIENCE AND TECHNOLOGY, PROFESSOR (90129784)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Oxynitrides / Calcium silicon oxvnitrides / Calcium silicon oxvnitride / Synthesis conditions / Luminescence uronerties / Activator |
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| Research Abstract |
The synthesis conditions of alkaline-earth silicon oxynitrides, Ca-Si-O-N and Ba-Si-O-N systems, have been investigated in this research; properties of the resulting powders were examined chiefly from the viewpoints of their luminescence characteristics due to the addition of rare-earth ions. The oxynitride materials examined in this research were Ca_3Si_2O_4N_2, Ca_2Si_30_2N_4 and BaSi_6ON_8. The starting materials used in this research were calcium carbonate (CaCO_3), barium carbonate (BaCO_3), silicon oxide (SiO_2), silicon nitride (Si_3N_4) and rare-earth oxide (= activator; Eu_2O_3, Yb_2O_3, CeO_2, Tb_4O_7 and Sm_2O_3).
Firstly, the optimum conditions (temperature and time) for the synthesis of Ca_3Si_2O_4N_2 (N/O ratio = 0.5) prepared using CaO, SiO_2 and Si_3N_4 were found to be 1450℃ and 2 h, respectively. The luminescence properties of (Ca_<1-x>REx)_3Si_2O_4N_2 (RE: Rare earth element) were examined. Among these rare-earth doped compounds, (Ca_<1-x>Smx)_3Si_2O_4N_2 and (Ca_<1-x>Tbx) 3Si_2O_4N_2 indicated red and green emitting, respectively. On the other hand, the single phase of Ca_3Si_2O_2N_4(N/O ratio = 2.0) was obtained heating the starting materials (CaO and Si_3N_4) at 1550℃ for 2 h. The (Ca_<1-x>Eux)3Si_2O_2N_4 emitted the reddish orange light whose peak wavelength was shifted from 606 to 620 nm with increasing x value from 0.01 to 0.1.
Furthermore, the single phase of BaSi_6ON_8 was obtained heating the starting materials (BaCO_3, SiO_2 and Si_3N_4) 1750℃ for 2 h. The excitation and emission peaks of (Ba_<1-x>Ce_x) Si_6ON_8 were observed at around 363 and 480 nm, respectively; the relative intensity of (Ba_<0.95>Ce_<0.05>) Si_6ON_8, compared to the intensity of CaWO_4 as a standard substance, attained 0.82. The excitation and emission peaks of (Ba_<1-x>Eux) Si_6ON_8 were found at around 300 and 500 nm, respectively, showing the blue-green emission. The relative intensity of (Ba_<0.96>Eu_<0.04>) Si_6ON_8 attained 2.7.
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Research Products
(28 results)
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[Journal Article] Syntheses of rare-earth silicon oxynitrides and their luminescence properties2007
Author(s)
M., Kawana, K., Itatani, Y., Kojima, W. M., Otten, A. C. A., Delsing, H. T., Hintzen, S., Koda
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Journal Title
Transactions of Materials Research Society of Japan 32
Pages: 119-122
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Synthesis and luminescence properties of rare-earth ion doped barium silicon oxynitride2008
Author(s)
S., Sumioka, K., Itatani, Y., Miyake, S., Taya, Y., Kojima, H. T., Hintzen, S., Koda
Organizer
Annual Meeting of the Ceramic Society of Japan, 2008
Place of Presentation
Nagaoka(Japan)
Year and Date
2008-05-22
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 酸窒化ケイ素バリウムの発光特性2007
Author(s)
住岡 慎一郎, 板谷 清司, H.T.Hintzen, 小嶋 芳行, 幸田 清一郎
Organizer
第18回日本MRS学術シンポジウム
Place of Presentation
日本大学(東京)
Year and Date
2007-12-08
Description
「研究成果報告書概要(和文)」より
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[Presentation] 種々の酸窒化ケイ素カルシウムの蛍光特性2007
Author(s)
住岡 慎一郎, 板谷 清司, 川名 道哉, 小嶋 芳之, H.T.Hintzen, 幸田 清一郎
Organizer
第23回日本セラミックス協会関東支部研究発表会
Place of Presentation
ネオオリエンタルリゾート八ケ岳高原(山梨県北杜市)
Year and Date
2007-08-31
Description
「研究成果報告書概要(和文)」より
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[Presentation] Luminessence properties of calucium silicon oxynitrides2007
Author(s)
CS., Sumoka, K., Itatani, M., Kawana, Y., Kojima, H. T., Hintzen, S., Koa
Organizer
23rd Ceramics Research Conference of Kanto Branch, Ceramic Society of Japan
Place of Presentation
Hokuto-shi(Japan)
Year and Date
2007-08-31
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Luminescence properties of rare-earth silicon oxynitrides-Effect of Tb doping-2006
Author(s)
M., Kawana, K., Itatani, H. T., Hintzen, T., Yasue, S., Koda
Organizer
Annual Meeting of the Society of Inorganic Materials, Japan
Place of Presentation
Tokyo(Japan)
Year and Date
2006-09-20
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Effect of rare-earth oxide addition on luminescence properties of rare-earth silicon oxynitrides2006
Author(s)
K., Itatani, M., Kawana, H., Kuwahara, H., Kuroe, T., Sekine T., Yasue, H. T., Hintzen, S., Koda
Organizer
Annual Meeting of the Ceramic Society of Japan, 2006
Place of Presentation
Tokyo(Japan)
Year and Date
2006-03-15
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 希土類ケイ素酸窒化物の蛍光特性2005
Author(s)
川名 道哉, 板谷 清司, H.T.Hintzen, 安江 任, 幸田 清一郎
Organizer
無機マテリアル学会第111回学術講演会
Place of Presentation
岡山大学(岡山)
Year and Date
2005-11-11
Description
「研究成果報告書概要(和文)」より
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[Presentation] Luminescence properties of rare-earth silicon oxynitride2005
Author(s)
M., Kawana, K., Itatani, H. T., Hintzen, T., Yasue, S., Koda
Organizer
Annual Meeting of the Society of Inorganic Materials, Japan
Place of Presentation
Okayama(Japan)
Year and Date
2005-11-11
Description
「研究成果報告書概要(欧文)」より
