Synthesis of Ce0.8Gd0.05Y0.15O1.9 Nanopowders

La2NiO4+σ nanofibers exhibiting typical Ruddlesden–Popper structure (K2NiO4) were fabricated by a facile electrospinning method. X-ray diffraction, scanning electron microscopy and transmission electron microscopy were used to analyze the structure, morphology and crystal process of the La2NiO4+σ nanofibers. For electrical properties measurement, uniaxially aligned nanofibers were directly collected and assembled into electrode. In our research, La2NiO4+σ phase forms above 873K with no impurity phase emerges during the thermal treatments. The nanofibers are smooth and uniform throughout the entire length and the grain is growing as calcination temperature increases. Furthmore, the La2NiO4+σ nanofibers own high mixed conductivity at 773K, laying good foundation for intermediate temperature solid oxide fuel cells application.

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Модификация структурно-морфологических свойств германия в многослойной нанопериодической структуре Al-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=-/Ge с промежуточными слоями Si при отжиге

Физика и техника полупроводников ◽

10.21883/ftp.2021.10.51438.37 ◽

2021 ◽

Vol 55 (10) ◽

pp. 882

Author(s):

М.В. Байдакова ◽

Н.А. Берт ◽

В.Ю. Давыдов ◽

А.В. Ершов ◽

А.А. Левин ◽

...

Keyword(s):

Electron Microscopy ◽

Heat Treatment ◽

Annealing Temperature ◽

Electron Beam Evaporation ◽

X Ray Diffraction ◽

Bimodal Size Distribution ◽

X Ray ◽

Transmission Electron ◽

Mean Size ◽

The Mean

Multi-layered nanosized Al2O3/Ge/Si structures manufactured by electron-beam evaporation and annealed at a temperature within the range 700−900◦C are examined using transmission electron microscopy, Raman spectroscopy and X-ray diffraction techniques. The periodic structure with a good layer planarity is confirmed to retain after heat treatment up to 900◦C. At an annealing temperature above 700◦C, nanocrystallites with a bimodal size distribution start to form within initially amorphous Ge layers, the mean size of small crystallites being determined by Ge layer thickness and annealing temperature. An essential loss of Ge from multi-layered structure after 900oC anneal and development of Ge1−x Six solid solution with x up to 0.07 in the nanocrystallites is revealed.

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Synthesis of Y2O3 Nanoparticles by Modified Transient Morphology Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.446-447.62 ◽

2013 ◽

Vol 446-447 ◽

pp. 62-67

Author(s):

Ahmad Amirabadizadeh ◽

Zobedeh Momeni Larimi

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Powder Diffraction ◽

Single Phase ◽

Yttrium Nitrate ◽

Sulfate Ions ◽

Xrd Pattern ◽

X Ray ◽

Transmission Electron ◽

Nanometric Size

Yttrium oxide nanopowder has been successfully synthesized by a modified transient morphology. In the first step, a foamy structure was produced by combustion synthesis using yttrium nitrate and glycine. This was followed by the addition of sulfate ions and calcination at 1100 °C for 4 h. The sulfated powders were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM). The XRD pattern shows Y2O3 single phase after calcination. The TEM images confirm the nanometric size of the particles in the range of 40-100nm.

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Synthesis of Y2O3 Nanoparticles by Modified Transient Morphology Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.465-466.993 ◽

2013 ◽

Vol 465-466 ◽

pp. 993-997

Author(s):

A. Amirabadizadeh ◽

Zobedeh Momeni Larimi

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Powder Diffraction ◽

Single Phase ◽

Yttrium Nitrate ◽

Sulfate Ions ◽

Xrd Pattern ◽

X Ray ◽

Transmission Electron ◽

Nanometric Size

Yttrium oxide nanopowder has been successfully synthesized by a modified transient morphology. In the first step, a foamy structure was produced by combustion synthesis using yttrium nitrate and glycine. This was followed by the addition of sulfate ions and calcination at 1100 °C for 4 h. The sulfated powders were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM). The XRD pattern shows Y2O3 single phase after calcination. The TEM images confirm the nanometric size of the particles in the range of 40-100nm.

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Hydrothermal Synthesis and Characterization of BiFeO3 Polyhedral Crystallites

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.174-177.508 ◽

2012 ◽

Vol 174-177 ◽

pp. 508-511

Author(s):

Lin Lin Yang ◽

Yong Gang Wang ◽

Yu Jiang Wang ◽

Xiao Feng Wang

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Transmission Electron Microscopy ◽

Synthesis And Characterization ◽

X Ray Diffraction ◽

Xrd Pattern ◽

X Ray ◽

Transmission Electron ◽

Scanning Electron

BiFeO3 polyhedrons had been successfully synthesized via a hydrothermal method. The as-prepared products were characterized by power X-ray diffraction (XRD) pattern, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The possible mechanisms for the formation of BiFeO3 polyhedrons were discussed. Though comparison experiments, it was found that the kind of precursor played a key role on the morphology control of BiFeO3 crystals.

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Preparation and Property of Al87Ce3Ni8.5Mn1.5 Nanophase Amorphous Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.412.263 ◽

2011 ◽

Vol 412 ◽

pp. 263-266

Author(s):

Hong Wei Zhang ◽

Li Li Zhang ◽

Feng Rui Zhai ◽

Jia Jin Tian ◽

Can Bang Zhang

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Single Phase ◽

Volume Fraction ◽

Material Structure ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

X Ray ◽

Transmission Electron ◽

Different Temperatures

The higher mechanical strength of Al87Ce3Ni8.5Mn1.5 nanophase amorphous composites has been obtained with two methods. The first nanophase amorphous composites are directly produced by the single roller spin quenching technology. The method taken for the second nanophase amorphous composites is at first to obtain amorphous single-phase alloy, followed by annealed at different temperatures .The formative condition, the microstructure, the particle size, the volume fraction of α-Al phase and microhardness of nanophase amorphous composites etc have been investigated and compared by X-ray diffraction (XRD) and transmission electron microscopy (TEM) and differential scanning calorimetry (DSC). The microstructure of composites produced by the second method is higher than the former, the fabricated material structure of the system is more uniform and the process is easier to control.

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Correlating Laboratory-Based X-Ray and Electron Microscopy to Characterize Defects and Structural Evolution in Solid Oxide Fuel Cells

ECS Meeting Abstracts ◽

10.1149/ma2016-01/31/1503 ◽

2016 ◽

Keyword(s):

Electron Microscopy ◽

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Structural Evolution ◽

Solid Oxide ◽

Oxide Fuel ◽

X Ray

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Direct Preparation of Ce0.8Sm0.2O1.9 Powders Oxidized With H2O2 for Low Temperature SOFCs Application

3rd International Conference on Fuel Cell Science, Engineering and Technology ◽

10.1115/fuelcell2005-74027 ◽

2005 ◽

Author(s):

Jianbing Huang ◽

Zongqiang Mao ◽

Bin Zhu ◽

Lizhai Yang ◽

Ranran Peng ◽

...

Keyword(s):

Single Phase ◽

Fluorite Structure ◽

X Ray Diffraction ◽

Composite Electrolyte ◽

Xrd Pattern ◽

Transmission Electron ◽

Direct Preparation ◽

Novel Method ◽

Power Densities

A novel method was developed to prepare fine doped ceria (DCO) powders directly. Ceria doped with 20 mol. % of samarium (Ce0.8Sm0.2O1.9, SDC) was prepared by in-situ oxidization of hydroxide precipitates with H2O2 in the solutions. The resultant powder desiccated at 85°C overnight was characterized by X-ray diffraction (XRD), thermogravimetry /differential thermal analysis (TG/DTA), and transmission electron microscopy (TEM). The XRD pattern showed that the as-dried SDC powder is single phase with a cubic fluorite structure like that of pure CeO2. An anode-supported SOFC was also fabricated based on SDC and 20wt. % (62mol. %Li2CO3–38 mol. %K2CO3) composite electrolyte, LiNiO2 as cathode and NiO as anode, by cold pressing. Using hydrogen as the fuel and air as the oxidant, the I-V and I-P characteristics exhibit excellent performances and the maximum power densities are about 696, 469, 377 and 240 mWcm−2 at 650, 600, 550 and 500°C, respectively.

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Preparation and Characterization of Nanocrystalline Gadolinium Oxide Powders and Films

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.850.267 ◽

2020 ◽

Vol 850 ◽

pp. 267-272 ◽

Cited By ~ 1

Author(s):

Regina Burve ◽

Vera Serga ◽

Aija Krūmiņa ◽

Raimons Poplausks

Keyword(s):

Electron Microscopy ◽

Single Phase ◽

Gadolinium Oxide ◽

X Ray Diffraction ◽

Cubic Crystal ◽

Glass Substrates ◽

Oxide Powders ◽

Transmission Electron ◽

The Mean

Due to its magnetic, electrical, absorption, and emission properties, nanoscale gadolinium oxide is widely used in various fields. In this research, nanocrystalline Gd2O3 powders and films on glass substrates have been produced by the extraction-pyrolytic method. X-ray diffraction analysis revealed the formation of single phase Gd2O3 with cubic crystal structure and the mean crystallite size from 9 to 25 nm in all produced materials. The morphology of samples has been characterized by scanning electron microscopy and transmission electron microscopy.

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Characterization of Zn0.96Al0.02Ga0.02O Thermoelectric Material

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.802.227 ◽

2013 ◽

Vol 802 ◽

pp. 227-231

Author(s):

Panida Pilasuta ◽

Pennapa Muthitamongkol ◽

Chanchana Thanachayanont ◽

Tosawat Seetawan

Keyword(s):

Crystal Structure ◽

Electron Microscopy ◽

Single Phase ◽

Hexagonal Structure ◽

Hexagonal Crystal Structure ◽

X Ray Diffraction ◽

Hexagonal Crystal ◽

X Ray ◽

Transmission Electron

Crystal structure of Zn0.96Al0.02Ga0.02O was analyzed by X-Ray diffraction (XRD) technique and the microstructure was observed by scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The XRD results showed single phase and hexagonal structure a = b = 3.24982 Å, and c = 5.20661 Å. The SEM and TEM results showed the grain size of material arrangement changed after sintering and TEM diffraction pattern confirmed hexagonal crystal structure of Zn0.96Al0.02Ga0.02O after sintering.

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