Faculty Profiles - SAKIDA Shinichi

MISC - SAKIDA Shinichi

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Material recycling of inorganic sludge by wet ball milling Reviewed

Environmental research & control 31 ( 31 ) 26 - 31 2009

湿式ボールミル法を用いた産業廃棄物の再資源化技術の開発

崎田真一

財団法人八雲環境科学振興財団研究レポート集2009 ( 10 ) 88 - 93 2009

Chemical recycling of inorganic wastes by using phase separation of glass Reviewed

Tokuro Nanba, Shuhei Mikami, Takuya Imaoka, Shinichi Sakida, Yoshinari Miura

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN 116 ( 1350 ) 220 - 223 2008.2

Language：English Publisher：CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI

A chemical recycling process using phase separation of glass was applied to a granulated blast furnace slag with high CaO content. Glasses were prepared by adding B2O3 to the slag in order to promote phase separation, and the glasses were heat-treated above glass transition temperature. In the subsequent acid-treatment, however, gelation due to the elution of SiO2 phase containing CaO occurred, not obtaining high SiO2 Solids. Then, pretreatment was introduced to reduce CaO content in slag, where the raw slag was briefly washed in acid. The slag glasses prepared from the pretreated slag were commonly phase-separated by heat-treatment regardless of B2O3 content. After subsequent acid-treatment, colorless insoluble solids were successfully recovered. The end products consist of 70-90 mass% SiO2, and coloring ions such as Mn, Fe and Cr were almost completely removed from the slag glasses. Reutilization as raw materials for glass is expected.

DOI： 10.2109/jcersj2.116.220

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鉛フリー光学ガラスとしてのSnO-B2O3ガラスの光学特性 Reviewed

崎田真一, 難波徳郎, 三浦嘉也

環境制御 30 39 - 44 2008

Language：Japanese Publisher：岡山大学環境管理センター

The preparation of SnO-B(2)O(3) and SnO-SiO(2) glasses by melting in Ar atomosphere was performed. The prepared SnO-B(2)O(3) glasses were large enough to measure optical properties whereas the vitrification in SnO-SiO(2) system was very difficult. PbO-B(2)O(3) and BiO1.5-B(2)O(3) glasses were also prepared for comparison with SnO-B(2)O(3) glasses. The densities, glass transition temperatures, and optical properties such as refractive indices, dispersion, and transmission spectra of SnO-B(2)O(3), PbO-B(2)O(3), and BiO(1.5)-B(2)O(3) glasses were measured. On the basis of the obtained results, the potential for SnO-B(2)O(3) glasses as lead-free glasses is particularly discussed from the viewpoint of optical properties.

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一般廃棄物高温焼却炉用クロムフリー耐火物の開発

伊賀棒公一, 崎田真一, 紅野安彦, 難波徳郎, 藤田基成, 山口明良

耐火物 60 ( 3 ) 2008

Optical properties of Er3+-doped tungsten tellurite glass waveguides by Ag+-Na+ ion-exchange Reviewed

Shinichi Sakida, Tokuro Nanba, Yoshinari Miura

OPTICAL MATERIALS 30 ( 4 ) 586 - 593 2007.12

Language：English Publisher：ELSEVIER SCIENCE BV

The planar waveguides of 12Na(2)O center dot 35WO(3) center dot 53TeO(2) center dot 1Er(2)O(3) glass (in mol%) were prepared by Ag+-Na+ ion-exchange at 300-360 degrees C for 5-30 h. The effective mode indices and propagation losses of the waveguides were measured at the wavelengths of 473, 632.8, 983.1 and 1548 nm by means of a prism coupler technique. The waveguide depths from glass surface increased with increasing ion-exchange temperature and time. The diffusion parameters such as diffusion coefficient and activation energy were calculated on the basis of an Arrhenius temperature dependence of the diffusion coefficient of Ag+ ions in the ion-exchanged glasses. The propagation losses of the waveguides were 5.04-6.64, 2.70-4.77, 5.44-6.73 and 7.32-8.31 dB/cm in the first half in the propagation distance from 0 to 3.0 cm and 3.52-4.82, 1.92-2.99, 3.78-5.06 and 3.91-5.15 dB/cm in the latter half at 473, 632.8, 983.1 and 1548 nm, respectively. The relationship between the optical properties of the waveguides and the ion-exchange conditions is discussed. (c) 2007 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.optmat.2007.01.010

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Sintering of Al2O3-Cr2O3 powder prepared by sol-gel process Reviewed

Motonari Fujita, Keisuke Inukai, Shinichi Sakida, Tokuro Nanba, Junji Ommyoji, Akira Yamaguchi, Yoshinari Miura

Zairyo/Journal of the Society of Materials Science, Japan 56 ( 6 ) 526 - 530 2007.6

Language：English

The sol-gel method was applied to create Al2O 3-Cr2O3 ceramics using aluminum ethylacetoacetate diisopropylate and chromium (III) chloride hexahydrate as starting materials. In the calcination at 600-1200°C it was found that the grains of Cr2O3-rich solid solution grew when they were exposed to the surrounding Al2O3-rich amorphous particles. The composition of the powders obtained by the sol-gel process changed with calcining temperature. Cr2O3-rich solid solutions firstly crystallize at low temperature and the composition of the crystallites changes as the crystals grow and react with the surrounding Al2O 3-rich phases. The final sintered bodies fired under an Ar atmosphere showed higher relative densities as compared with those fired in air. A dense sintered body was not obtained when abnormal grains grew when calcining occurred. © 2007 The Society of Materials Science.

DOI： 10.2472/jsms.56.526

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Material recycling of blast furnace slag by phase separation of glass Reviewed

29 11 - 15 2007

Material recycling of municipal waste slags by using phase separation of glass

Journal of the Faculty of Environmental Science and Technology,Okayama University 12 ( 1 ) 161 - 165 2007

Refractive-index profiles and propagation losses of Er3+-doped tungsten tellurite glass waveguide by Ag+-Na+ ion-exchange Reviewed

S. Sakida, T. Nanba, Y. Miura

MATERIALS LETTERS 60 ( 28 ) 3413 - 3415 2006.12

Language：English Publisher：ELSEVIER SCIENCE BV

The planar waveguide of 12Na(2)O-35WO(3)(.)53TeO(2)lEr(2)O(3) glass (in mol%) was prepared by Ag+-Na+ ion-exchange at 330 degrees C for 5 h. The effective mode indices and propagation losses of the waveguide at the wavelengths of 473, 632.8, 983.1 and 1548 nin for TE and TM modes were measured by means of a prism coupler technique. The results were compared with those of a planar waveguide of the tungsten tellurite glass without Er3+ ions. Especially, the propagation losses of ion-exchanged tellurite glass waveguides were estimated for the first time to the best of our knowledge. (c) 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.matlet.2006.03.024

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Structural change around Si atoms in P2O5-SiO2 binary glasses before and after annealing by Si-29 MAS NMR spectroscopy Reviewed

Shinichi Sakida, Tokuro Nanba, Yoshinari Miura

CHEMISTRY LETTERS 35 ( 11 ) 1268 - 1269 2006.11

Language：English Publisher：CHEMICAL SOC JAPAN

The Si-29 MAS NMR spectra of P2O5-SiO2 binary glasses were measured before and after annealing to examine the local structure around Si atoms in the glasses. The glasses were composed of SiO6 octahedra and Q(4) (SiO4 tetrahedra with four bridging oxygens). By increasing the P2O5 content, the fractions of SiO6 octahedra increased and those of Q4 decreased. The fractions of SiO6 octahedra increased by 6-8% in the range of 29.7 to 47.4 mol % P2O5 by annealing for 5 h. This result was found for the first time in binary glasses. On the basis of the results obtained, the local structure around Si atoms in the glasses and the structural change by annealing are discussed.

DOI： 10.1246/cl.2006.1268

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Hardening mechanism of refractory patching materials with phosphate binder Reviewed

Shinichi Sakida, Yuichi Yamamoto, Tokuro Nanba, Yoshinari Miura, Tetsuhiro Hayashi, Akira Yamaguchi

Zairyo/Journal of the Society of Materials Science, Japan 55 ( 7 ) 670 - 674 2006.7

Language：Japanese

The hardening mechanism of refractory patching materials with a phosphate binder was investigated by means of 31P static and magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy. Ten refractory patching materials were made of refractory powders of SiO 2 and fused alumina and five mixed solutions of phosphoric acid and aluminum biphosphate as phosphate binders. 31P static and MAS NMR spectra were measured of five phosphate binders and twenty soft and hard refractory patching materials, respectively, to reveal the local structure around P atoms. The 31P static and MAS NMR spectra revealed that PO 4 tetrahedra in the phosphate binders have no P-O-P linkage between PO 4 tetrahedra and that as the patching materials become hard, the ratio of PO 4 tetrahedra with bridging oxygens increases, respectively. This result suggests that the hardening of the patching materials is caused by the condensation of the phosphate binder. But the ratio of PO 4 tetrahedra with bridging oxygens was not enough to form the network by P-O-P linkage between PO 4 tetrahedra. On the basis of these results, the hardening mechanism of refractory patching materials with a phosphate binder is proposed.

DOI： 10.2472/jsms.55.670

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Studies on optical properties of SnO-based glasses as lead-free glasses Reviewed

28 28 - 33 2006

Pr3+,Tm3+イオン添加重金属酸化物ガラスの赤外発光特性

三浦嘉也, 難波徳郎, 山口亮, 崎田真一

岡山大学大学院ベンチャー・ビジネス・ラボラトリー研究年報 2006

テルライト系ガラスの屈折率の組成依存性

赤嶺宗子, 崎田真一, 難波徳郎, 三浦嘉也

セラミックス基礎科学討論会講演要旨集 44th 2006

Consideration on the correlation between basicity of oxide glasses and O1s chemical shift in XPS

T Nanba, Y Miura, S Sakida

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN 113 ( 1313 ) 44 - 50 2005.1

Language：English Publishing type：Book review, literature introduction, etc. Publisher：CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI

O1s binding energy measured by X-ray photoelectron spectroscopy (XPS) is candidate as a new tool to determine a new scale of Lewis basicity of oxide ions in glass. Some mathematical expressions for the basicity or XPS chemical shift, such as charge parameter and optical basicity, were compared with the experimental O1s binding energy in binary alkali oxide glasses. The expressions so far in use needed some modification in parameters. A new empirical expression introduced in this paper gives a new concept and universal scale of basicity.

DOI： 10.2109/jcersj.113.44

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Tm3+含有重金属酸化物ガラスの光学特性

三浦嘉也, 難波徳郎, 崎田真一, 六車真人

岡山大学大学院ベンチャー・ビジネス・ラボラトリー研究年報 2005

Bi2O3系ガラスの構造

難波徳郎, 崎田真一, 三浦嘉也

New Glass Vol.20 (No.2), 35-43 2005

Ag+-Na+イオン交換法によるEr3+ドープテルライトガラス光導波路作製およびその導波特性

崎田真一

岡山大学大学院ベンチャー・ビジネス・ラボラトリー研究年報 2004

Cd-113 MAS and static NMR study of chlorocadmate glasses

S Sakida, H Nakata, Y Kawamoto

CHEMISTRY LETTERS 32 ( 9 ) 786 - 787 2003.9

Language：English Publisher：CHEMICAL SOC JAPAN

Cd-113 magic-angle spinning (MAS) and static NMR spectra were measured of fourteen kinds of chlorocadmate glasses to reveal the chlorine coordination environments around Cd2+ in the glasses in detail. The spectra of the glasses suggest that the glass structures are mainly composed of infinite double-chains of edge-shared CdCl6 octahedra, being independent of the CdCl2 content and the kinds of chlorides except for CdCl2. Cd-113 MAS and static NMR spectroscopies enabled us to reveal not only chlorine coordination number of Cd but also linkage manners between CdCl6 octahedra in the glasses.

DOI： 10.1246/cl.2003.786

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