Preparation of undoped and Tb^<3+>-doped fluorescent HfO_2 spherical particles

スポンサーリンク

概要

• 論文の詳細を見る

• Undoped and Tb^<3+>-doped HfO_2 spherical particles were prepared by a sol-gel method, by using hafnium tetra-t-butoxide (Hf(O-t-C_4H_9)_4) as a precursor of hafnium dioxide, SPAN85^<[○!R]> as a surfactant, mixed solvent of C_2H_5OH and n-C_4H_9OH, and H_2O, 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^<[○!R]>:H_2O=1:8-17.5, their sizes being 0.2-5μm in diameter. Particles became small and aggregated when the molar ratio of H_2O was more than 17.5, but became large when it was less than 8. Spherical particles heat treated at 400℃ or below were amorphous, and those heat treated at 600℃ or above were crystallized. Tb^<3+>-doped HfO_2 spherical particles showed green luminescence due to the ^5D_4→^7F_J (J=6, 5, 4, 3) transitions of the Tb^<3+> ion, and relatively strong luminescence was observed both in dried gel particles and particles heat treated at 1000℃. These Tb^<3+>-doped HfO_2 spherical particles can be expected for new optical materials.

• 社団法人日本セラミックス協会の論文
• 2008-12-01

著者

• 和田 憲幸

  鈴鹿工業高等専門学校材料工学科

• Kojima Kazuo

  Department Of Gastroenterology Dokkyo Medical University

• Matsumoto Taichi

  Department Of Applied Chemistry College Of Life Sciences Ritsumeikan University

• 和田 憲幸

  立命館大学理工学研究科物質理工学専攻

• 和田 憲幸

  九州大学大学院総合理工学研究科材料開発工学 九州大学大学院

• Wada Noriyuki

  Graduate School Ritsumeikan University

• Wada Noriyuki

  Department Of Materials Science And Engineering Suzuka National College Of Technology

• SANADA Tomoe

  Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University

• KAWAI Masashi

  Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University

• NAKASHITA Hiroshi

  Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University

• Kojima Kazuo

  Department Of Applied Chemistry College Of Life Sciences Ritsumeikan University

• Sanada Tomoe

  Department Of Applied Chemistry College Of Life Sciences Ritsumeikan University

• Kawai Masashi

  Department Of Applied Chemistry College Of Life Sciences Ritsumeikan University

• Nakashita Hiroshi

  Department Of Applied Chemistry College Of Life Sciences Ritsumeikan University

関連論文

• シレナイト系単結晶育成のためのT-T-T図とC-C-T図
• Left-sided hepatic hydrothorax diagnosed by contrast-enhanced ultrasonography with intraperitoneal injection of Levovist
• ゾルーゲル法を用いて作製したGeO_2ガラス中のEr3^周りの局所構造に関する振動及びXAFSスペクトルによる研究
• 積層単相膜加熱による環境にやさしい合金薄膜の作製技術の開発
• サーマルポーリングによるガラスの2次非線形光学特性
• 溶融酸化物の塩基度とは何か?
• 希土類イオンを含有するフォトニクスガラス (特集 ガラスおよびフォトニクス材料)
• Serum and tissue PIVKA-II expression reflect the biological malignant potential of small hepatocellular carcinoma
• β-ユークリプタイト多孔質体における構造支配因子
• Spectroscopic Properties of Er^-Doped Al_2O_3-GeO_2 Gel
• Tumor Cell Proliferation of Hepatocellular Carcinoma, with Special Reference to Ultrasonographic Findings and Arterial Vascularity by US Angiography
• リン酸塩ガラスでの銅微粒子の析出と成長機構
• β-BaB_2O_4単結晶の育成過程と昇温,冷却過程の状態図
• 熱ポーリングした石英ガラスの第2高調波発生の機構
• Prediction of Phase Equilibria for Systems Containing Phenols, Water, And CO_2 Using PRASOG
• 熱処理過程におけるCu微粒子分散ガラスの分散と粒径制御
• Liquid-Liquid Solubilities for the Binary Systems of Methanol with Octane and 2, 2, 4-Trimethylpentane
• Extraction of Lactic Acid Using Long Chain Amines Dissolved in Non-Polar Diluents
• Organometallic Synthesis of InP Quantum Dots Using Tris(dimethylamino)phosphine as a Phosphorus Source
• Preparation of undoped and Tb^-doped fluorescent HfO_2 spherical particles
• Fabrication of glasses with low softening temperatures for mold-processing by ion-exchange(Fracture and Related Phenomena of Glasses)
• Injection Molding of Electrolytic Copper Powder〔訂正版〕
• Comparison between Cu-Ni Alloy Powder and Cu,Ni Powder Mixture by Metal Injection Molding〔訂正版〕
• Comparison between Cu-Ni Alloy Powder and Cu, Ni Powder Mixture by Metal Injection Molding
• Injection Molding of Electrolytic Copper Powder
• MEASUREMENT OF INFINITE DILUTION ACTIVITY COEFFICIENT AND APPLICATION OF MODIFIED ASOG MODEL FOR SOLVENT-POLYMER SYSTEMS
• DETERMINATION OF THE BINARY CROSS VIRIAL COEFFICIENT IN THE WONG-SANDLER MIXING RULE FOR CUBIC EQUATIONS OF STATE
• PREDICTION OF VLE USING ASOG AND ZERO PRESSURE G^E MIXING RULE CONSISTENT THE SECOND VIRIAL COEFFICIENT CONDITION
• PREDICTION OF EXCESS ENTHALPY AND EXCESS ENTROPY USING MODIFIED UNIFAC GROUP CONTRIBUTION METHODS
• PREDICTION OF VAPOR-LIQUID EQUILIBRIA BY USIMG EQUATIONS OF STATE WITH ZERO-PRESSURE EXCESS GIBBS ENERGY MIXING RULES. THE RKU2 MODEL FOR MODERATE TEMPERATURES
• PSRK PREDICTION OF CRITICAL POINTS IN BINARY MIXTURES CONTAINING ALKANES OR CYCLOALKANES
• THERMODYNAMIC ANALYSIS OF CHEMICAL PROCESSES: ASOG-BASED METHODS FOR THE PREDICTION OF EXCESS ENTHALPY AND EXCESS ENTROPY
• Prediction of vapor-liquid equilibria with chemical reaction by analytical solutions of groups.
• Activity coefficients for water+phenol system.
• Metronidazole-induced Encephalopathy
• Extraction of Lactic Acid Using Long Chain Amines Dissolved in Non-Polar Diluents
• THERMODYNAMIC RELATIONS FOR TESTING CONSISTENCY OF TERNARY VAPOR-LIQUID EQUILIBRIUM DATA
• Pressure and temperature effects on octahedral-tetrahedral equilibria in pyridine solutions of some cobalt(II) halides.
• Pressure and temperature effects on octahedral-tetrahedral equilibria in pyridine solutions of some cobalt(II) halides. II.
• Absorption spectra of tetrahedral Co(II) in single crystals of (N(CH3)4)2(CoX4) (X=Cl, Br).
• Absorption spectra of tetrahedral Co(III) and Co(II) complexes in heteropolytungstates.
• Optical and ESR spectra for high-spin tetrahedral complexes of Co(III) and Co(II) in Keggin-structure heteropolytungstate.
• Prediction of liquid-liquid equilibria for ternary systems by the asog method.
• Prediction of high pressure vapor-liquid equilibria with mixing rule using ASOG group contribution method.
• Prediction of liquid-liquid equilibria by an analytical solutions of groups.
• Pressure and temperature effects on octahedral-tetrahedral equilibria in 3-methylpyridine solutions of some cobalt(II) halides.
• Prediction of solid-liquid equilibria using asog.
• Vapor-liquid equilibria for the acetone-ethanol-n-propanol-tert-butanol-water system.
• Determination of new ASOG parameters.

もっと見る 閉じる

スポンサーリンク