Low Temperature Preparation of Aluminum Titanate Film via Sol-Gel Method

2014 ◽  
Vol 936 ◽  
pp. 238-242
Author(s):  
Yi Bao ◽  
Wei Hui Jiang ◽  
Guo Feng ◽  
Jian Min Liu ◽  
Qian Wu
Keyword(s):  
Low Temperature ◽  
Sol Gel ◽  
Thermo Gravimetric Analysis ◽  
Chelating Agent ◽  
Tetrabutyl Titanate ◽  
Gravimetric Analysis ◽  
Aluminum Titanate ◽  
Gel Method ◽  
Sol Gel Method ◽  
Low Temperature Preparation

Aluminum titanate (Al2TiO5) film was prepared via sol-gel method at low temperature, using ethyl acetoacetate and anhydrous citric acid as compound chelating agent, tetrabutyl titanate (Ti (OC4H9)4) and aluminum chloride (AlCl3.6H2O) as precursors, ethanol as solvent. The phase transformation of Al2TiO5 xerogel during heat treatment, the effect of different chelating agents on the synthesis of Al2TiO5, and the phase composition and morphology of film were investigated by means of differential thermal and thermo gravimetric analysis (DTA-TG), X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR) and field-emission scanning electron microscopy (FE-SEM). The results demonstrate that Al2TiO5 can be synthesized at 750 °C by using compound chelating agent, rather than single chelating agent. Compound chelating agent contributes to the formation of Al-O-Ti heterogeneous bond, which is the key to preparing Al2TiO5 at low temperature. High quality Al2TiO5 film could be coated on the SiC substract at 750°C.

Synthesis of Aluminum Titanate Powder at Low Temperature via Nonhydrolytic Sol-Gel Method by Using Aluminum Powder

2013 ◽  
Vol 745-746 ◽  
pp. 673-678 ◽  
Author(s):  
Wei Hui Jiang ◽  
Zhi Fang Xu ◽  
Jian Min Liu ◽  
Qing Xia Zhu ◽  
Quan Zhang
Keyword(s):  
Low Temperature ◽  
Aluminum Powder ◽  
Raw Materials ◽  
Sol Gel ◽  
Aluminum Titanate ◽  
Gel Method ◽  
Sol Gel Method ◽  
Transmission Electron ◽  
Oxygen Donor ◽  
Metal Aluminum

Aluminum titanate (Al2TiO5) powder has been synthesized at low temperature via nonhydrolytic sol-gel method by using aluminum powder as aluminum source, titanium tetrachloride as titanium source, anhydrous ethanol as oxygen donor with different catalysts. The phase transformation of aluminum titanate xerogel powder during heat treatment and the influence of the mixing orders of raw materials, catalyst kinds on the synthesis of aluminum titanate were investigated by means of differential-thermal analysis (DTA-TG), X-ray diffraction (XRD), transmission electron microscope (TEM). The results indicated that aluminum titanate powder was easily synthesized at 750 °C by using AlCl3 as catalyst with a mixing order of adding TiCl4 before AlCl3 into aluminum alcohol mixture. The catalytic order of the different catalysts in the preparation process of aluminum titanate is: FeCl3> AlCl3> MgCl2. The catalyst promoted the activation of metal aluminum powder and played a major role in the synthesis of aluminum titanate powder at low temperature via nonhydrolytic sol-gel method.

Low-temperature preparation of transparent conductive Al-doped ZnO thin films by a novel sol–gel method

2014 ◽  
Vol 49 (14) ◽  
pp. 4722-4734 ◽  
Author(s):  
Dongyun Guo ◽  
Kuninori Sato ◽  
Shingo Hibino ◽  
Tetsuya Takeuchi ◽  
Hisami Bessho ◽  
...  
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Sol Gel ◽  
Zno Thin Films ◽  
Gel Method ◽  
Sol Gel Method ◽  
Low Temperature Preparation ◽  
Doped Zno ◽  
Temperature Preparation

scholarly journals Synthesis and Characterization of Hydroxyapatite Nanoparticles using Sol-Gel Method

2010 ◽  
Vol 13 (1-2) ◽  
pp. 85 ◽  
Author(s):  
S. Manocha ◽  
Parth Joshi ◽  
Bhavini Patel ◽  
L.M. Manocha
Keyword(s):  
Sol Gel ◽  
Thermo Gravimetric Analysis ◽  
Calcium Nitrate ◽  
Calcium Nitrate Tetrahydrate ◽  
Gravimetric Analysis ◽  
Hydroxyapatite Nanoparticles ◽  
Gel Method ◽  
Sol Gel Method ◽  
Biological Compatibility ◽  
Nitrate Tetrahydrate

<p>Hydroxyapatite (HAp) is a unique material having high adsorption capacity of heavy metals, high ion exchange capacity, high biological compatibility, low water solubility, high stability under reducing and oxidizing conditions, availability and low cost. Hydroxyapatite nanoparticles have been synthesized by Sol-gel method using Calcium nitrate tetrahydrate [Ca(NO<sub>3</sub>)<sub>2</sub>•4H<sub>2</sub>O] and Phosphorus pentaoxide (P<sub>2</sub>O<sub>5</sub>) as starting reactants. The addition of Phosphorus pentaoxide to Calcium nitrate tetrahydrate was carried out slowly with simultaneous stirring. After addition, solution was aged for 10 minutes for maturation. The precipitate was dried at 80 °C overnight and further heat treated at 550 °C for 2 hours. The dried and calcined particles were characterized by X-ray diffractometry, Fourier transform infra-red spectroscopy and Thermo gravimetric analysis. The particle size and morphology were studied using transmission electron microscopy. TEM examination of the treated powders displayed particles of polygon morphology with dimensions 20-50 nm in length. The FT-IR spectra for sample confirmed the formation of hydroxyapatite.</p>

Synthesis of Y0.2ZrXCe0.8−XO1.9 Electrolytes From the Sol-Gel Method for Intermediate Temperature URSOFC Application

2012 ◽  
Vol 9 (4) ◽  
Author(s):  
Guo-Bin Jung ◽  
Ting-Chu Jao ◽  
Chia-Chen Yeh ◽  
Ming-Hsien Huang ◽  
Wang-Shen Su
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Relative Density ◽  
Sol Gel ◽  
Thermo Gravimetric Analysis ◽  
Intermediate Temperature ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Gel Method ◽  
Sol Gel Method ◽  
Co Precipitation

A series of Y0.2ZrxCe0.8−xO1.9 compounds (0 ≤ x ≤ 0.6) had been prepared by the modified sol-gel method and characterized by powder X-ray diffraction, thermo-gravimetric analysis, four-probe resistivity, and Vickers’s hardness studies. The gels from co-precipitation were treated with heated 1-octanol. All of the samples showed fluoride structure after calcined at 600 °C. Sintering the powders of Y0.2Ce0.8O1.9 and Y0.2Zr0.6Ce0.2O1.9 at 1300 °C gave the relative density of 95.8% and 99%, respectively. 99% relative density could be obtained for all samples after sintering at 1500 °C. This study showed a much more improved result than that of the previous reports. The hardness was 13.7 GPa for the Y0.2Zr0.6Ce0.2O1.9 pellet, which was twice greater than that for Y0.2Ce0.8O1.9 (7.1 GPa). Therefore, the mechanical properties could be improved by the addition of ZrO2 to Y0.2ZrxCe0.8−xO1.9. At 800 °C, the electrical conductivity of Y0.2Ce0.8O1.9 and Y0.2Zr0.6Ce0.2O1.9 were 3.3 × 10−2 S/cm and 5.5 × 10−3 S/cm, respectively. The conductivity was decreased by the addition of ZrO2 to Y0.2Ce0.8O1.9. It showed that the conductivity and hardness of Y0.2Zr0.2Ce0.6O1.9 were 1.2 × 10−2 S/cm and 9.6 GPa, respectively, at 800 °C and could be a better electrolyte candidate for “intermediate-temperature” unitized regenerative solid oxide fuel cells.

Low-temperature preparation of (002)-oriented ZnO thin films by sol–gel method

2014 ◽  
Vol 550 ◽  
pp. 250-258 ◽  
Author(s):  
Dongyun Guo ◽  
Kuninori Sato ◽  
Shingo Hibino ◽  
Tetsuya Takeuchi ◽  
Hisami Bessho ◽  
...  
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Sol Gel ◽  
Zno Thin Films ◽  
Gel Method ◽  
Sol Gel Method ◽  
Low Temperature Preparation ◽  
Temperature Preparation

Low temperature preparation of NaTi2(PO4)3 by sol-gel method

2010 ◽  
Vol 7 (9/10/11/12) ◽  
pp. 1077 ◽  
Author(s):  
Radha Velchuri ◽  
B. Vijaya Kumar ◽  
V. Rama Devi ◽  
Sang Il Seok ◽  
M. Vithal
Keyword(s):  
Low Temperature ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Low Temperature Preparation ◽  
Temperature Preparation

Low-Temperature Synthesis of Magnesium-Stabilized Aluminum Titanate Powder via Non-Hydrolytic Sol-Gel Method

2016 ◽  
Vol 848 ◽  
pp. 319-323 ◽  
Author(s):  
Guo Feng ◽  
Wei Hui Jiang ◽  
Jian Min Liu ◽  
Quan Zhang ◽  
Zi Hu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Sol Gel ◽  
Magnesium Acetate ◽  
Magnesium Fluoride ◽  
Aluminum Titanate ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Magnesium Powder ◽  
Gel Method ◽  
Sol Gel Method

Magnesium-stabilized aluminum titanate powder was prepared via non-hydrolytic sol-gel method using titanium tetrachloride and anhydrous aluminium chloride as precursors, anhydrous ethanol as the oxygen donor, magnesium powder, magnesium fluoride, magnesium ethoxide and anhydrous magnesium acetate as stabilizers. The effect of magnesium stabilizers on low temperature synthesis of aluminum titanate was investigated, and their role and mechanism in stabilizing aluminum titanate were also studied by XRD, FT-IR and thermal expansion dilatometer. The results show that introducing magnesium powder or magnesium fluoride can’t stabilize aluminum titanate, they also lead to the failure of aluminum titanate low-temperature synthesis at 750 °C due to its promotion of non-hydrolytic homogeneous condensation. Anhydrous magnesium acetate and magnesium ethoxide can react with aluminum alkoxide and titanium alkoxide in the precursor mixture to form heterogeneous condensation bonds, which promotes magnesium ion to dope into aluminum titanate lattice at 750 °C, and hence to improve its thermal stability.

Investigation of Nanostructure and Magnetic Properties of Nanocrystalline NiZnCu Ferrites Synthesized by Sol-Gel Method

2015 ◽  
Vol 754-755 ◽  
pp. 1169-1174 ◽  
Author(s):  
Prengki Pransisco ◽  
Afza Shafie ◽  
Beh Hoe Guan
Keyword(s):  
Grain Size ◽  
Magnetic Properties ◽  
Crystallite Size ◽  
Calcination Temperature ◽  
Sol Gel ◽  
Thermo Gravimetric Analysis ◽  
Variable Pressure ◽  
Gravimetric Analysis ◽  
Gel Method ◽  
Sol Gel Method

Nanocrystalline material of ferrites with composition Ni0.5Zn0.35Cu0.15Fe2O4was successfully synthesized by sol-gel method. This paper investigates nanostructure and magnetic properties of nanocrystaline material Ni0.5Zn0.35Cu0.15Fe2O4.Crystallite size, intensity,d-spacing and lattice parameters of material were investigated by using X-Ray diffractometer (XRD). While nanostructure, size, shape, surface morphology and topography of Ni0.5Zn0.35Cu0.15Fe2O4were examined by variable pressure field emission scanning electron microscope (VP-FESEM) SUPRA 55VP. Magnetic properties was investigated using vibrating sample magnetometer (VSM). According to thermo gravimetric analysis (TGA) result, it was found that after temperature 600oC there is no more weight loss detected and it was considered as minimum calcination temperature. XRD result shows that the samples is in single-phase cubic spinel structure. Crystallite size of the material is in range of 42.3-163.7nm. Highest intensity was 88.89 arb.units at highest calcination temperature 900oC. The value of d-spacing and FWHM decrease with increasing calcination temperature. Lattice paramenters decrease in the range of 8.4040-8.2458oA. VP-FESEM analysis shows that grain size increase by increasing calcination temperature. Grain size of the material is in the range of 47.6-506.9nm with cubic structure of the Ni0.5Zn0.35Cu0.15Fe2O4.VSM result shows that the highest value of magnetic saturation was at 152.8emu/g. The best value of coercive force (Hc) was in 31.8Oe and magnetic remanence (Mr) was in 2.6emu/g.

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