Emission modulation of Eu3+ via symmetry around dodecahedron in garnet-type Ca2EuZr2-xSnxGa3O12 (x = 0, 0.5, 1, 1.5, and 2) phosphors


Slow photon photocatalytic enhancement of H2 production in TaON inverse opal photonic crystals


Optical and Photocatalytic Properties of Three-Dimensionally Ordered Macroporous Ta2O5 and Ta3N5 Inverse Opals


Synthesis of Proton Conductors, BaZr1-xYxO3 through Two Steps of Preparation Method Using Precipitates of NH4HCO3 and NH4OH

NH4HCO3とNH4OHの2種類の沈澱剤を用いたプロトン伝導体BaZr1-xYxO3-δ微粒子の作製


Syntheses, single crystal structure analyses and ultraviolet light emission of CaW1-xMoxO4 (x = 0.0-1.0) scheelite-powellite solid solutions

Journal of Mineralogical and Petrological Sciences


Characterization of negative thermal expansion material Zr2-xTixWP2O12 with MgO


Effect of A-site deficiency on perovskite-type Mn4+-activated La5/3MgTaO6 red phosphor and green luminescence of the Mn2+ occupied six-coordinate site in Mg2LaTaO6


Fabrication of transparent ITO/GTO bilayer diode thin films


Microscopic Structure and Binding Mechanism of the Corrosion-Protective Film of Oleylpropanediamine on Copper in Hot Water


Rock-salt-type lithiumtitanium oxynitride as anode material for Li-Ion secondary batteries


Synthesis and characterization of negative thermal expansion of the Zr2(WO4)(PO4)2 system


Fabrication and evaluation of Co-doped SrTiO3 thermoelectric materials by molten salt method

International Journal of Modern Physics B


Local structural changes in Ce1-xLnxO2-δ (Ln = La, Gd) solid electrolytes


Ca2Si5N8:Eu2+ phosphors synthesized in graphite crucibles for enhanced reducing atmosphere


Effects of the solvent during the preparation of MoS2 nanoparticles by laser ablation


タンパク質結晶成長場及びX線回折実験用試料固定材としてのトラックエッチド メンブランフィルターの利用


Field effect transistor behavior of Bi2Se3 nanostructure prepared by laser ablation


Effect of nanosecond and femtosecond pulse laser on the formation of WS2 nanostructures and field emission characteristics


Effect of thermoelectric material of Ca or Fe-doped LaCoO3


Production of boron nitride nanostructures using nanosecond laser ablation in acetone


Photocatalytic activity of nanostructured tubular TiO2 synthesized using kenaf fibers as a sacrificial template


Study of morphology and electrical properties of indium zinc oxide-modified kenaf fiber


Stability and electrical conductivity of Nb- or Ta- doped SrTiO3 perovskites for interconnectors in solid oxide fuel cells


A New Synthesis Route of Petrovskite-related Sr2TaO3N Oxynitride via Sr2Ta6O10.188


Synthesis and Optical Studies of La1.1Ti1-xWx(O,N)3 Prepared by Sol-Gel Method

International Journal of Advanced Research


Photoluminescence Properties of (Ba1-(x+y)SrxEuy)2Si6O12N2 Phosphors for White LED Applications


Structural and optical properties of perovskite-type LaTiO2N synthesized using urea or thiourea as co-nitriding agents


X-ray Rietveld refinement of structure of Ba-deficient Ba3Si6O12N2:Eu phosphor


Deposition of IGZO or ITZO thin films by co-sputtering of IZO and GZO or ITO targets


Identification of Second Phases for Sr1-xLaxTiO3 Perovskites Synthesized by Citric-Gel Method


Tuning of Optical Properties in La1-xBaxTaON2 Oxynitride through Composition and Particle Size Controls


Local structure of Zn in Cretaceous-Tertiary boundary clay from Stevns Klint

The local structure around zinc atoms in Cretaceous-Tertiary (K-T) boundary clay from Stevns Klint, Denmark, was studied by Zn K-edge XAFS spectroscopy. XAFS measurements were performed at the BL-12C and BL-9C beamlines at the Photon Factory in the High Energy Accelerator Research Organization (KEK), Japan. The local structure around Zn in the K-T clay resembles the framework structure of the tetrahedral ZnO4 site in the zinc silicate willemite, judging from first shell Zn-O and second shell Zn-cation distances [1.953(3) and 3.51(2) Å, respectively], X-ray absorption near edge structure (XANES) spectra, and radial structure function. The Debye-Waller factor ς2 of the K-T clay sample is similar to those for the tetrahedral sites in crystalline phases, where Zn occupies mainly tetrahedral sites. The local structure of Zn in the K-T clay is peculiar and differs from that found in many clay minerals.

Journal of Mineralogical and Petrological Sciences


Local structure of magnetite and maghemite and chemical shift in Fe K-edge XANES

Local structures around Fe and chemical shifts in X-ray absorption fine structure (XAFS) spectra were investigated for synthetic Fe1-dO, Fe3O4 (magnetite), γ-Fe2O3(maghemite), and SrFeO3-e, as well as natural Fe3O4 and α-Fe2O3 (hematite) specimens. XAFS spectra near the Fe K-edge were measured at BL-9C and BL-12C of the Photon Factory, KEK, Japan. Similar measurements for Fe-N pairs in Fe nitrides (FeN, Fe2N, Fe4N) were obtained for comparison. The X-ray absorption near edge structure (XANES) spectra for various iron compounds, in particular Fe3O4 and γ-Fe2O3, and FexN specimens, showed clear chemical shifts of half-maximum positions with the changing oxidation states of the Fe ions in their structures. The energy at half maximum position should be used for the quantitative discussion of the oxidation and valence states of the Fe ion in Fe compounds rather than the threshold energy E0 found using differentiating XAFS spectra. The δ values in Fe3-δO4 (δ=0.333 for end-member γ-Fe2O3) for magnetite and maghemite were estimated by the extent of the chemical shifts. Decreases in the average Fe-O distances and extended X-ray absorption fine structure (EXAFS) Debye-Waller factor ς2 values for spinel-type Fe3-δO4 solid-solutions were consistent with the estimated δ values. The error in proving the Fe3+/Fetotal ratio in the system by the XAFS method would appear to be less than ±0.10, and higher reliability than this value would be acquired in the comparison of relative values at half-maximum positions.


SINTERING AND ELECTRICAL PROPERTIES IN AIR FOR A-SITE DEFICIENT (Sr0.7La0.3)1-yTiO3 PEROVSKITE SAMPLES WITH AND WITHOUT TiO2 PHASE

International Journal of Modern Physics: Conference Series


STUDY OF VISIBLE LIGHT REACTIVE PHOTOCATALYST TIO2 PREPARED WITH THIOUREA


HOMOGENIZATION OF PARTICLE SIZES IN LaTiO2N OXYNITRIDE PIGMENTS BY BEAD-MILLING TECHNIQUE


A-SITE DEFICIENCY AND STRUCTURAL AND ELECTRICAL CHARACTERISTICS OF (Sr1-xREx)1-yTiO3 PEROVSKITES (RE=La, Nd and Sm)


Reduction of Volatile Organic Compounds Using Photocatalysts Activated by Blue Led


A-site and B-site non-stochiometry and sintering Characteristics of (Sr1-xLax)1-yTi1-zO3 Perovskites

Journal of Fuel Cell Science and Technology


PRECISE STRUCTURE ANALYSES OF ADVANCED MATERIALS UNDER HIGH-PRESSURE AND HIGH-TEMPERATURE

International Journal of Modern Physics B


Preparation, crystal structure, and superconductive characteristics of new oxynitrides (Nb1-xMx)(N1-yOy) where M=Mg, Si, and x~y


Peak Shift due to a barium deficiency in the 27Al MAS-NMR spectrum for Eu2+-activated barium aluminum silicon oxynitride phosphors


Preparation and luminescence properties of Eu2+-activated Ba-Six-O-N phosphors


Luminescence enhancement of Eu2+, Ce3+ co-doped Ba3Si5O13-dNd phosphors


Multielemental characterization of airborne particulate matter collected in Bucharest and Tokushima by inductively coupled plasma mass spectrometry and inductively coupled plasma atomic emission spectrometry

Airborne particulate matter (PM) collected in Bucharest (Romania) and Tokushima (Japan) was comprehensively characterized through multielemental analysis by ICP-MS to the PM samples. Prior to an elemental characterization of the sample, a multielemental determination method composed of acid digestion (HClO(4)/HNO(3)/HF or H(2)O(2)/HNO(3)/HF) and inductively coupled plasma mass spectrometry/inductively coupled plasma atomic emission spectrometry (ICP-MS/ICP-AES) was established to analyze a certified reference material of vehicle exhaust matter (NIES No. 8) for verifying the method. As the results, 39 elements in the certified reference material could be determined. They were a good agreement with the certified and reference values for HClO(4)/HNO(3)/HF acid digestion. Chalcophile elements, such as cadmium, antimony, and lead in Bucharest showed higher enrichment factors than those in Tokushima.


Structural phase transition in the perovskite-type tantalum oxynitrides, Ca1-xEuxTa(O,N)3


Structural analysis of homologous series of ZnkIn2Ok+3 (k=3, 5, 7) and ZnkInGaOk+3 (k=1, 3, 5) as thermoelectric materials


Optical properties of (La,Sr)TiO2N series depending on non-stoichiometries and particle sizes varying in accordance with heat treatment conditions

IOP Conference Series: Materials Science and Engineering


Relationship between anion and cation nonstoichiometries and valence state of titanium in perovskite-type oxynitrides LaTiO2N

Three series of (La,Sr)TiO_2N compounds, with either anion nonstoichiometry LaTiO_<2+x>N_<1-x>, cation nonstoichiometry La_<1-x> Ti_<1+x>O_2N or an La_<1-x>Sr_xTiO_2N series, have been prepared in order to clarify, by XPS spectroscopy, the influence of composition on the valence state of titanium. Though the substitution of lanthanum by strontium was effective in the enhancement of reflectivity in the longer wavelength region above the absorption edge, the valence state of titanium did not change in either the La_<1-x>Ti_<1+x>O_2N or the La_<1-x>Sr_xTiO_2N series. However, it was found that the increase of oxygen content in the LaTiO_<2+X>N_<1-x> series causes oxidation of the titanium.


Crystal and electronic band structures of homologous compounds ZnkIn2Ok+3 by Rietveld analysis and first-principle calculation


Influence of Ga2O3 addition on transparent conductive oxide films of In2O3-ZnO


In2O3-ZnO transparent conductive oxide film deposition on polycarbonate substrates


Influence of Cation Nonstoichiometry on the Optical Properties of the Perovskite-type Oxynitride LaTiO2N

A series of perovskite-type LaTiO_2N materials with compositions a slightly deviated from the stoichiometric metal composition was prepared. The cation nonstoichiometry in the oxynitrides affected not on the bandgap but on the reflectivity. It seemed that the more ratio of titanium to lanthanum resulted in lower reflectivity.


Characterization of Ce0.9-xZrxGd0.1O1.95 powders synthesized using the nanoparticle growth technique and its evaluation as component materials in intermediate-temperature solid oxide fuel cells


Pressure Dependence of Anharmonic Effective Pair Potentials in Rock Salt Type AgI


EXAFS and XPS Study of Rutile-Type Difluorids of First-Row Transition Metals


Local Structure of Transition Elements (V, Cr, Mn, Fe and Zn) in Al2SiO5 Polymorphs


A Study on Low Temperature Oxidation of PM in Diesel Exhaust by using Non-thermal Plasma

バリア放電プラズマを用いたディーゼル微粒子の低温酸化に関する研究

Transactions of the Society of Automotive Engineers of Japan


Luminescent Properties of (Y,Gd)3Al5O12:Ce Phosphors Prepared by Citric-Gel Method

International Journal of Modern Physics B


Effects of Al, Ga-Doping on Transparent Conducting Properties of Amorphous ZnO-SnO2 Films


Catalytic Activity for Methane Oxidation of Goethite Supported on Alumina


Thermal Vibration Analysis of RuO2 by EXAFS


Total Oxidation of Activated Carbon over PdO-CeO2/TiO2-Al2O3 Catalyst


Low-Temperature and Rapid Solid-State Synthesis of YAG:Ce Powders Using Oxides with Narrow Particle Size Distribution

Physica Status Solidi (C) Current Topics in Solid State Physics


Blue-Shift of Absorption Edge in LaTiO2N by Controlling the Anion Nonstoichiometry

Physica Status Solidi (A) Applications and Materials Science


Effect of components in electrodes on sintering characteristics of Ce0.9Gd0.1O1.95 electrolyte in intermediate-temperature solid oxide fuel cells during fabrication


Development of Mass Production of Ce0.9Gd0.1O1.95 Nanopowder with High-Sintering Characteristics

易焼結性Ce0.9Gd0.1O1.95ナノ粒子の量産技術の開発

The mass production process of Ce_<0.9>Gd_<0.1>O_<1.95>(CGO) nanopowder with high-sintering characteristics has been studied. Although CGO powders were fabricated using a large scale coprecipitation bath with a capacity of 65kg/batch, particle size distribution curve of this powder showed two peaks for the agglomeration and this powder showed lower sintering characteristics, compared to the CGO nanopowder by a small scale bath with a capacity of 0.1kg/batch. It was found that when the impurity of NO_3^- in the powder was removed by water using the rate of 50L/kg, the formation of oval shape particles was observed and it is easy to crush the agglomerations in the powder by hammer-type mill. The sintering characteristics of this powder are almost same to those of the powder synthesized by the small scale bath.

日本セラミックス協会学術論文誌


Effects of introduction of argon on structural and transparent conducting properties of ZnO-In2O3 thin films prepared by pulsed laser deposition

パルスレーザー蒸着法により酸化亜鉛-酸化インジウム透明導電膜を作製した．蒸着中にArガスをO2ガスとともに導入することにより，アモルファス相が現れる領域が広くなることが明らかになった．また，膜表面の平滑性が格段に向上することを示した．


Catalytic Activity of Iron Oxides Supported on γ-Al2O3 for Methane Oxidation

Three kinds of catalysts of goethites supported on γ-Al2O3 (Fe/γ-Al2O3), SiO2-Al2O3 (Fe/SiO2-Al2O3) and SiO2 (Fe/SiO2) were investigated in terms of the catalytic activity of methane oxidation. The specific surface areas of these catalysts were larger in common than the area of goethite with no supports. The Fe/γ-Al2O3 catalyst has the highest performance in the low-temperature activity of methane oxidation which started at 623 K and completed at 923 K. When the Fe-content in Fe/γ-Al2O3 was increased, the formation of goethite was observed by the X-ray analyses and the activity of this catalyst increased up to 6 mol%. After the catalytic methane oxidation at 823 K, it was observed that goethite in Fe/γ-Al2O3 transformed to hematite which has been known as an active iron oxide in methane oxidation. The activity of Fe/γ-Al2O3 was enhanced by the addition of sodium up to the Na-content of 5 mol% although it descended above the content due to the decrease of the specific surface area of the catalyst.

Journal of the Japan Petroleum Institute


Characterization of ZnO-In2O3 transparent conducting films by pulsed laser deposition

パルスレーザー蒸着法により酸化亜鉛-酸化インジウム透明導電膜を作製した．蒸着中にO2ガスとともに導入することにより，可視光領域の透明性を確保することが可能となった．酸化インジウム相からアモルファス相に移行する組成[Zn]/([Zn]+[In])=0.2∼0.3付近で最小抵抗値を示すことが明らかとなった．


Sunthesis of Divalent metalNitrides Zn3N2 and Mg3N2 and Enhancement of Their Bandgap by Insertuin of Lithium

Processing and Fabrication of Advanced Materials XIII


Amorphous Transparent Conductive Oxide Films of In2O3-ZnO with Additional Al2O3 Impurities

ZnO-In2O3系透明導電膜にAl2O3を不純物として添加することで，新材料を開発し，この系の電気的特性，光学的特性について調べた．Zn/(Zn+In)の組成比を変えていくと，アモルファス相とホモロガス(結晶)相が現れた．これらの電気伝導メカニズムについて検討した．さらに，Al2O3の添加の効果が，Al2O3を添加しないZnO-In2O3アモルファス膜と比較して，電気伝導性を損なわずに光学的バンドギャップを広げる効果があることを発見した．また，アモルファス膜は表面が平坦であることも示した．これらのことは，透明電極への応用において意義のある発見である．というのは，これらの特長は青色や紫外用デバイスでの透明電極の応用にマッチした特性である．また，低温基板上にも作製できる点で，有機基板上への透明電極作製の展望が開けた．

Journal of Vacuum Science & Technology A


Zinc Oxynitride Powders Examined by X-ray Absorption Near Edge Spectroscopy

電子転換収率法と蛍光法を用いて，含有酸素量·窒素量の異なる酸窒化亜鉛のXANESスペクトルを測定した．表面に敏感な電子転換収率法とバルクの情報に近い蛍光法では酸窒化亜鉛の窒素K吸収端近傍のXANESスペクトルに違いが見られ，作製した酸窒化亜鉛の酸素は，その粒子の表面近傍に編析していることを示した．


Thermal Vibration of the Rutile-Type Difluorides of First-Row Transition Metals


XAFS and XRD Studies of PdO-CeO2 Catalysts on χ-Al2O3


Transparent Conducting Amorphous Zn-Sn-O Films Deposited by Simultaneous DC Sputtering

酸化亜鉛-酸化スズ系透明導電性アモルファス薄膜について，その組成と透明導電性の関係を明らかにした．アモルファス構造ととっていても，アモルファス中の亜鉛の含有量が増加するに従い，イルメナイト型ZnSnO3に近い構造から逆スピネル型Zn2SnO4に近い構造へと変化していくことを示した．イルメナイト型構造中では亜鉛は6配位であるが，逆スピネル型では4あるいは6配位をとるようになるので，配位数の減少による共有結合性の増加が生じ，その結果酸素欠損が生じにくくなるので，亜鉛含有量が増加するとキャリア濃度が減少し，その結果抵抗率の上昇をもたらすことを示した．


Direct Detection of a Phase Change in PdO/CeO2 Supported on χ-Al2O3 by means of in situ High-Temperature Measurements of XRD and FTIR

本論文では，メタン酸化反応におけるc-Al2O3担持PdO/CeO2触媒でのPdOからPdへの変化をXRD及びFT-IRの高温その場測定により直接に観測した．この変化は雰囲気中の酸素分圧変化に対して可逆的であり，この変化がメタン酸化における触媒作用の本質であると結論した．この結論はこれ迄の研究結果をよく説明するものである


Al-impurity-doped Transparent Conductive Oxide Films of In2O3-ZnO System

ZnO-In2O3系の透明導電膜へのAl2O3の添加効果について調べた．Al2O3を添加しないときには，アモルファス相の膜において，低抵抗率がえられる組成比δ＝Zn/(Zn+In)の範囲は0．2∼0．4と狭いが，A2O3を3wt%添加すると，2∼4x10-4Ωcmの範囲の組成比は0.3∼0．6と広がる．また，Al2O3＝2wt%の膜の光学的バンドギャップが添加しない場合のそれよりも小さくなるband shrinkageを示すが，3wt%添加ではバンドの広がりが観測された．ホモロガス(結晶)相においては，Al2O3の添加量とともに光学的バンドギャップは広がる．これはAl2O3が格子を歪ませている結果であると考えられる．Al2O3の添加はアモルファス膜の抵抗率には大きな変化は与えないが，ホモロガス(結晶)膜ではキャリア密度を減少させ，抵抗率を上昇させた．


ZnO-SnO2 transparent conductive films deposited by opposed target sputtering system of ZnO and SnO2 targets

対向ターゲット式DCマグネトロンスパッタリング法により，酸化亜鉛-酸化スズ系透明導電性薄膜を作製した．薄膜中の亜鉛含有量が増加するに従い，生成相はルチル型相，アモルファス相，ウルツ鉱型相と変化した．アモルファス相では，組成がSnO2·ZnSnO3となる付近で抵抗率が極小値を示し，ZnO·ZnSnO3となる付近で極大値を示すことを明らかにした．


Effect of CeO2 Addition on the Change of Crystal Structure of PdO Supported on x-Al2O3 under the Methane Atmosphere

メタン雰囲気下におけるx-Al2O3に担持したPdOの結晶構造に及ぼすCeO2添加の影響

本論文では，ギブサイトを前駆体としたc-Al2O3担持PdOを用いたメタン酸化反応におけるPdOの触媒活性とPdOの結晶構造変化との関連を議論した．PdOの触媒活性は，結晶中の格子酸素が反応より消費されることによる．この結果，結晶の(110)面に積層欠陥が生じ，PdOの還元により生じるPdの(100)面がPdOの(110)面と共有していることによってPdの(100)面にも積層欠陥が生じる．この面を介して酸化反応が進行することで，比較的低温で反応が進行することが分かった．CeO2の添加はこの格子不整の維持に役立っていると結論した

日本セラミックス協会学術論文誌


Effect of Texture and Composition of Microorganisms Carrier for Disposal of Wastewater

本論文では，水熱反応により表面処理して種々の多孔性固体を担持したガラス球を用い，排水清浄化を試みた．排水中のCOD測定により，多孔性固体としては珪酸カルシウム，酸化鉄及び酸化カルシウム等が有効であることが分かった．これらの化合物はガラス球表面に付着する微生物の増殖を阻害せず，そのため微生物による排水浄化作用が増大するためであると結論した．又，水熱時間を変えてガラス球表面の微視的構造を変化させその効果を検討したところ，水熱反応が長くなると排水清浄化はほぼ一定の値をとることが明らかになった．

Materials Science Research International


Structural Property and Activity for Methane Oxidation of Iron Oxides Prepared by NaOH and FeSO4 Solution

硫酸鉄水溶液と水酸化ナトリウム水溶液を混合することにより酸化鉄触媒を合成した．オキシ水酸化鉄であるゲータイトは混合比が酸性側である1.9以下あるいはアルカリ性側である2.6以上で生成した．酸性側のゲータイトは結晶性が悪く比表面積が低いにもかかわらずメタン酸化活性は低く，これはゲータイト中に残存する硫酸イオンに由来することを示した．

International Journal of Modern Physics B


Characterizations of Zinc Oxynitride Powders Prepared Under Ammonia Gas Flow

金属亜鉛粉末よりアンモニア窒化法を用いて酸窒化亜鉛を合成した．アンモニア窒化時間が長いほど，酸窒化亜鉛中の含有酸素量は少なくなり，含有窒素量は多くなった．窒化時間を制御することにより，酸窒化亜鉛の持つ光学バンドギャップを近赤外領域から可視光領域の任意の値に制御できることを示した．


Annealing Effects on Transparent Conducting Properties of Amorphous ZnO-In2O3 Films

酸化亜鉛-酸化インジウム系透明導電性アモルファス薄膜をアニールすることによりその特性向上を試みた．アニール後でもアモルファス構造を保つ組成を持つ薄膜は，アニールによりキャリア濃度は上昇するが，Hall移動度が減少し結果として抵抗率の減少には至らなかった．しかしながらアニール処理により膜の平滑性は大幅に改善されることが明らかになった．


Transparent Conducting Amorphous Oxides in Zinc Oxide-Indium Oxide System

酸化亜鉛-酸化インジウム系透明導電性酸化物薄膜の構造と透明導電性の関係について述べたものである．とくに薄膜にのみ現れるアモルファス相がその組成に近いホモロガス化合物ZnkIn2Ok+3と基本的な構造は同じであることを，X線回折図形に現れるブロードな回折ピークの組成依存性ピークシフトを解析することにより証明した．

10th International Ceramics Congress Part D


Pressure Dependence of Effective Pair Potentials in AgBr Determined by Extended X-Ray Absorption Fine Structure

Japanese Journal of Applied Physics, Part 1 (Regular Papers & Short Notes)


Structural changes of quartz-type crystalline and vitreous GeO2 under pressure

Using a large volume high pressure apparatus, quartz-type crystalline GeO2 and Li2O-4GeO2 glass have been compressed up to 14 GPa at room temperature and their local structural changes have been investigated by an in-situ XAFS method. In quartz-type crystalline GeO2, the change of the coordination number from 4 to 6 begins above 8 GPa and finishes below 12 GPa. On decompression, reversal transition begins below 8 GPa and there is a large hysteresis. Almost no sixfold coordination of Ge is preserved after releasing pressure. Change of coordination number in vitreous Li2O-4GeO2 begins above 6 GPa and is completed below 10 GPa. Reversal transition begins below 10 GPa and the hysteresis is smaller than that of quartz-type GeO2. Change of coordination number in vitreous Li2O-4GeO2 is also reversal.


Anharmonic effective pair potentials in CaTiO3, SrTiO3 and CaTiO3 perovskite

The temperature dependence of EXAFS Debye-Waller factors in CaTiO3, SrTiO3 and CaGeO3 perovskite was investigated with the cumulant expansion method. The CaGeO3 perovskite as an analogue of the Earth's lower-mantle mineral was synthesized in a cubic anvil type apparatus under 10 GPa 1250 K The Ca, Ti and Ge K-edge EXAFS spectra were measured in transmission mode at temperature up to 1100 K The effective pair potentials, V(u)= alpha (u2/2+ beta u3/3!, were evaluated and the Grüneisen parameter were calculated. The potential coefficients alpha and beta for Ti-O bond in CaTiO3 are 6.9 eVA(-2) and -38 eVA(-3), respectively. Those for Ge-O bond in CaGeO3 are 9.8 eVA(-2) and -36 eVA(-3), respectively.


Local structure and mean-square relative displacement in SiO2 and GeO2 polymorphs


Effective Pair Potentials of NaCl- and CsCl-type KBr Determined by X-Ray Absorption Fine Structure under Pressure


第3世代透明導電性アモルファス薄膜の創製

第3世代透明導電性アモルファス薄膜の創製

Bulletin of Faculty of Engineering, The University of Tokushima


高酸化活性を有する酸化鉄触媒の創製と複合化による高機能化

高酸化活性を有する酸化鉄触媒の創製と複合化による高機能化


Nonstoichiometry and sintering characteristics of (Sr,La)TiO3 perovskies

La置換形SrTiO3ペロブスカイトの不定比性と焼結性