Optimization of Experimental Parameters to the Formation of Bi2212 Phase via Sol-Gel Method

Bi-2212 superconducting phase was synthesized via sol-gel method, and the experimental parameters such as the concentration of precursor solution and heat treatment temperature were adjusted to find the optimal conditions. Metal nitrates were adopted as the starting materials and ethylenediaminetetracetic acid (EDTA) as chelating agent. Precursor solutions and gel with different concentration were obtained through the addition of different content of distilled water as solvent followed by heating at certain temperature to form grey powders. Afterwards, the powders were sintered at different temperature for 10 hours, respectively. X-ray diffraction (XRD) was adopted to investigate the phase purity and crystallinity of the sample derived. Results reveal that the optimized precursor solution concentration is 27% and the optimized sintering temperature is 850°C.

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Fabrication of Bi-2223 Powders Using Sol-Gel Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.412.125 ◽

2011 ◽

Vol 412 ◽

pp. 125-128 ◽

Cited By ~ 1

Author(s):

Ming Ya Li ◽

Xiao Yan Wang ◽

Cheng Li Ye ◽

Feng Lin Xue

Keyword(s):

Heat Treatment ◽

Sol Gel ◽

Chelating Agent ◽

Experimental Results ◽

Main Phase ◽

Gel Method ◽

Sol Gel Method ◽

Dwelling Time ◽

Metal Nitrates ◽

Gel Technique

The Bi-2223 powders were fabricated by the sol-gel technique. Metal nitrates were used as starting materials, and ethylenediamineteracetic acid was used as chelating agent. The solution was heated until it turns to gel. Then the organic was removed at a temperature of 240°C, and the nitrite was removed at 500°C. The powder was calcined at different temperature, varying the dwelling time. Experimental results show that the main phase of samples after heat treatment is Bi-2212 phase.

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Preparation and Morphological Controlling of Nanophase NaNbO3 by Sol-Gel Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.368-372.140 ◽

2008 ◽

Vol 368-372 ◽

pp. 140-143 ◽

Cited By ~ 3

Author(s):

Ying Lin ◽

Hai Bo Yang ◽

Fen Wang

Keyword(s):

Metal Ion ◽

Ph Value ◽

Sol Gel ◽

Chelating Agent ◽

Gel Method ◽

Sol Gel Method ◽

Forming Mechanism ◽

Water As Solvent ◽

Rapid Temperature ◽

The Stability

With citric acid as chelating agent, ethylene alcohol as etherification agent and water as solvent, NaNbO3 nanopowder was synthesized by citrate sol-gel method. The effects of amount of CA and EG, pH value on the stability of the precursor sol were investigated. The evolution of NaNbO3 crystal phase was also investigated by XRD and TG-DTA. The results showed that a homogeneous precursor sol was formed at in the case of n(CA) : n(metal ion)=3:1, n(CA) : n(EG)=1: 2 and 1:3 and pH=7.5. Sintering process largely influences the morphology of the prepared products. Grain-like nanoparticles could be obtained with a rapid temperature rising rate, while nanorods were obtained with a slow rate. The forming mechanism of different morphologies of the prepared nanoparticles was also discussed.

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Preparation of La0.75Sr0.25Cr0.5Mn0.5O3-δ Nanometer Powders by Sol-Gel Method and Research about its Electrochemical Performance

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.712-715.257 ◽

2013 ◽

Vol 712-715 ◽

pp. 257-261

Author(s):

Yin Lin Wu ◽

Qing Hui Wang ◽

Ling Wang ◽

Hai Yan Zhao

Keyword(s):

Heat Treatment ◽

Particle Size ◽

Electrochemical Performance ◽

Heat Treatment Temperature ◽

Sol Gel ◽

Treatment Temperature ◽

Preparation Process ◽

Gel Method ◽

Sol Gel Method ◽

Ft Ir

The La0.75Sr0.25Cr0.5Mn0.5O3-δnanometer powders were prepared by citric acid sol-gel method.The samples were characterized by DTA, FT-IR, XRD, TEM techniques. The preparation process, morphology of synthesized powders, the best heat-treatment temperature and the electrochemical performance had been studied. The results show that the spherical nanometer powders can be obtained and the best heat-treatment temperature is 800°C. The particle size is about 30nm and Ea is 0.071 eV.

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Studying on Preparation of AZO Thin Films with Sol-Gel Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.152-153.868 ◽

2010 ◽

Vol 152-153 ◽

pp. 868-873 ◽

Cited By ~ 1

Author(s):

Xiu Ling Lv ◽

Yu Bo Dou ◽

Juan Wang ◽

Ying Xu

Keyword(s):

Thin Films ◽

Optical Properties ◽

Sol Gel ◽

Treatment Temperature ◽

Zno Films ◽

Gel Method ◽

Sol Gel Method ◽

Crystallization Properties ◽

Doped Zno ◽

Micro Morphology

Al doped ZnO thin films（AZO films） was prepared by sol-gel method. The influence of Parameters of different processes on the crystallization properties, micro-morphology and optical properties of this kind of films were studied, using by X-ray diffractometer, filed emission stereoscan, spectral photometer, hall admeasuring apparatus. The results indicated that the crystallization properties, micro-morphology and optical properties of Al doped ZnO films were best on the condition that the sol density was 0.5mol/L, hat treatment temperature is 600 and there is a 8-layer coating.

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Al2O3 + Graphene Low-Friction Composite Coatings Prepared By Sol–Gel Method

Coatings ◽

10.3390/coatings10090858 ◽

2020 ◽

Vol 10 (9) ◽

pp. 858

Author(s):

Bożena Pietrzyk ◽

Sebastian Miszczak ◽

Ye Sun ◽

Marcin Szymański

Keyword(s):

Tribological Properties ◽

Composite Coatings ◽

Sol Gel ◽

Ceramic Coatings ◽

Treatment Temperature ◽

Graphene Nanoplatelets ◽

Low Friction ◽

Gel Method ◽

Sol Gel Method ◽

Graphene Composite

In this work, Al2O3 + graphene coatings were prepared using the sol–gel method. The aim of the study was preliminary determination of the influence of size and amount of graphene nanoplatelets on morphology, chemical structure, and basic tribological properties of Al2O3 + graphene composite coatings. Two types of reduced graphene oxide (rGO) nanoplatelets with different lateral size and thickness were used to prepare the coatings. To characterize them, scanning electron microscope (SEM), glow discharged optical emission spectrometer (GDOES), Fourier-transform infrared (FTIR), reflectance spectrometer, and ball-on-disk tribological tests were used. It was found that the presence of graphene in the Al2O3 + graphene coatings did not fundamentally change the chemical transformation of ceramic Al2O3 matrix. Morphology examinations of coatings containing larger graphene nanoplatelets revealed a tendency to their parallel arrangement in relation to the coated surface. The tribological properties of Al2O3 + graphene coatings turned out to be strongly dependent on the size of graphene nanoplatelets as well as on the heat treatment temperature. The friction coefficient as low as 0.11 and good durability were obtained for the Al2O3 + graphene coating with larger nanoplatelets and heat-treated at 500 °C. The results of conducted research indicate the potential use of Al2O3 + graphene composite coatings prepared by the sol–gel method as low-friction ceramic coatings.

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Synthesis, structural, magnetic and electrochemical properties of LiNi1/3Mn1/3Co1/3O2 prepared by a sol–gel method using table sugar as chelating agent

Electrochimica Acta ◽

10.1016/j.electacta.2013.09.065 ◽

2013 ◽

Vol 113 ◽

pp. 313-321 ◽

Cited By ~ 37

Author(s):

Nilüfer Kızıltaş-Yavuz ◽

Markus Herklotz ◽

Ahmed M. Hashem ◽

Hanaa M. Abuzeid ◽

Björn Schwarz ◽

...

Keyword(s):

Electrochemical Properties ◽

Sol Gel ◽

Chelating Agent ◽

Gel Method ◽

Sol Gel Method

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Structural and Optical Properties of Nickel-Doped and Undoped Zinc Oxide Thin Films Deposited by Sol-Gel Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.895.250 ◽

2014 ◽

Vol 895 ◽

pp. 250-253 ◽

Cited By ~ 2

Author(s):

Siti Hajar Basri ◽

Mohd Arif Mohd Sarjidan ◽

Wan Haliza Abd Majid

Keyword(s):

Thin Films ◽

Zinc Acetate ◽

Zinc Acetate Dihydrate ◽

Sol Gel ◽

Chelating Agent ◽

Zno Films ◽

Ni Doping ◽

Gel Method ◽

Sol Gel Method ◽

Glass Substrates

ZnO thin films with and without Ni-doping were successfully deposited by sol-gel method with zinc acetate dihydrate as inorganic precursor, and nickel (II) acetate tetrahydrate as dopant. The solutions were prepared by dissolving zinc acetate and nickel (II) acetate in ethanol and diethanolamine (DEA) as its chelating agent. Thin films were fabricated by using spin-coating method on glass substrates. ZnO films were obtained by pre-heating and post-heating at 300 °C for 10 minutes and 500 °C for 1 h respectively. The films were analyzed by X-ray diffraction (XRD), UV-Vis transmittance and photoluminescence (PL). All samples exhibit high transparency in visible. Ni dopant does not alter so much ZnO structure, which due to the ion substitution between Ni and Zn. However, the Ni tends to create a dopant energy interlayer in ZnO energy band gap which cause significant change in PL intensity.

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Effect of pH and annealing temperature on the structural and magnetic properties of cerium-substituted yttrium iron garnet powders produced by the sol-gel method

Materials Science-Poland ◽

10.1515/msp-2016-0036 ◽

2016 ◽

Vol 34 (2) ◽

pp. 362-367 ◽

Cited By ~ 5

Author(s):

I. Yarici ◽

M. Erol ◽

E. Celik ◽

Y. Ozturk

Keyword(s):

Magnetic Properties ◽

Yttrium Iron Garnet ◽

Annealing Temperature ◽

Ph Value ◽

Sol Gel ◽

Chelating Agent ◽

Yttrium Iron ◽

Gel Method ◽

Sol Gel Method ◽

Iron Garnet

AbstractCerium substituted yttrium iron garnet (Ce0.2Y2.8Fe5O12; Ce-YIG) nanoparticles were produced via the sol-gel method from solutions of Ce-, Y- and Fe-based precursors, a solvent and a chelating agent. The solutions were dried at 200°C and heat treated at temperatures between 800 °C and 1400°C for 3 h in air. The effects of pH and annealing temperature on the structure, phase formation, magnetic properties and crystallite size were investigated. A cubic YIG phase was obtained for the sample annealed at 1400 °C. The presented results showed that the pH value of the starting solution affects the crystal size and consequently, the saturation magnetization.

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