Prepartion of Stabilized Aluminum Titanate Film via Nonhydrolytic Sol-Gel Route

The stabilized aluminum titanate (Al2TiO5) film was coated on the silicon carbide (SiC) substrate via nonhydrolytic sol-gel method (NHSG), using anhydrous aluminum chloride and titanium tetrachloride as precursors, ethanol as oxygen donor, different iron sources as stabilizers, and dimethyl mixed dibasic acid (DBE) with the characteristic of environmental protection and high boiling point as solvent. The phase transformation of modified Al2TiO5 xerogel during heat treatment, the effect of different iron stabilizers on the stabilization of Al2TiO5 film, and the influence of the coating process parameters on film-forming quality were investigated by means of DTA/TG, XRD and SEM. The results indicate that ethanol iron as the stabilizer, Al2TiO5 crystal phase can be formed at 750°C. While the temperature is raised further to 1000°C, Al2TiO5 is stable without decomposition, and has better synthesis effect. Selecting iron chloride, iron sulfate and iron ethanol as stabilizers respectively, only iron ethanol is effective to thermal stability of Al2TiO5 film. The best optimal vertical sliding velocity is 3.75 mm/s.

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

Materials Science Forum ◽

10.4028/www.scientific.net/msf.745-746.673 ◽

2013 ◽

Vol 745-746 ◽

pp. 673-678 ◽

Cited By ~ 1

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.

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Low Temperature Synthesis of Mullite Whisker by Nonhydrolytic Sol-Gel Process Combined with Molten Salt Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.538-541.2346 ◽

2012 ◽

Vol 538-541 ◽

pp. 2346-2349 ◽

Cited By ~ 2

Author(s):

Wei Hui Jiang ◽

Qian Wu ◽

Jian Min Liu ◽

Qing Xia Zhu ◽

Li Feng Miao

Keyword(s):

Low Temperature ◽

Molten Salt ◽

Sol Gel ◽

Crystal Phase ◽

Molten Salt Method ◽

Anhydrous Aluminum Chloride ◽

Low Temperature Synthesis ◽

Mixed Powder ◽

Oxygen Donor ◽

Sol Gel Process

Using tetraethyl orthosilicate and anhydrous aluminum chloride as precursors, ethyl ether as oxygen donor, LiF as mineralizer, and Na2SO4-NaCl as compound molten salt, mullite whisker was synthesized in the low temperature by nonhydrolytic sol-gel process combined with molten salt method. The phase transformation of mixed powder composed of mullite xerogel and molten salt during the heat treatment and the microstructure of mullite whisker corresponding to different temperature were characterized by means of DTA-TG, XRD SEM and TEM. The results show that mullite crystal phase can be formed via non-hydrolytic sol-gel process combined with the molten salt method at 750°C. The synthetic effect of mullite get better as the temperature increased to 850°C, while NaAlSiO4 crystal phase is also detected. Mullite whisker, with diameters ranging from 300~500 nm and lengths of 3~5μm, is prepared at the temperature of 850°C.

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Study on Mullite Whiskers Preparation via Non-Hydrolytic Sol-Gel Process Combined with Molten Salt Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.848.295 ◽

2016 ◽

Vol 848 ◽

pp. 295-300 ◽

Cited By ~ 2

Author(s):

Kai Lin Fu ◽

Wei Hui Jiang ◽

Jian Min Liu ◽

Guo Feng ◽

Mu Pan

Keyword(s):

Molten Salt ◽

Sol Gel ◽

Treatment Temperature ◽

Molten Salt Method ◽

Mass Ratio ◽

X Ray Diffraction ◽

Anhydrous Aluminum Chloride ◽

Oxygen Donor ◽

Sol Gel Process ◽

Mullite Whiskers

Mullite whiskers were prepared via non-hydrolytic sol-gel process combined with molybdate molten salt using tetraethoxysilane and anhydrous aluminum chloride as precussor, anhydrous ether as oxygen donor, molybdate as molten salt. The effects of heat treatment temperature, molten salt amount, holding time on synthesis and morphology of mullite whiskers were investigated by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The results show that the mullite whiskers appeared at the lowest temperature of 800°C, and optimized mullite whiskers could be prepared at 900°C for 8 h with the mass ratio of xerogel and molybdate as 1:2, the diameter of the whiskers was in the range of 0.15-0.22 μm with the aspect ratio of more than 40.

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Synthesis and photocatalytic properties of Sn–TiO2 nanomaterials

Journal of Advanced Dielectrics ◽

10.1142/s2010135x20600188 ◽

2020 ◽

Vol 10 (01n02) ◽

pp. 2060018

Author(s):

E. M. Bayan ◽

T. G. Lupeiko ◽

L. E. Pustovaya ◽

M. G. Volkova

Keyword(s):

Phase Transition ◽

Thermal Stability ◽

Sol Gel ◽

Rutile Phase ◽

Photocatalytic Properties ◽

Light Activation ◽

X Ray ◽

Tio2 Nanomaterials ◽

Visible Light Activation ◽

Thermal Stability Of

Sn-doped TiO2 nanomaterials were synthesized by sol–gel method. It was shown the phase compositions and phase transitions change with the introduction of different tin amounts (0.5–20[Formula: see text]mol.%). X-ray powder diffraction was used to study the effect of different tin amounts on the anatase–rutile phase transition. It was found that the introduction of ions increases the thermal stability of anatase modifications. The material’s photocatalytic activity was studied in reaction with a model pollutant (methylene blue) photodegradation under UV and visible light activation. The best photocatalytic properties were shown for material, which contains 5[Formula: see text]mol.% of Sn.

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