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

Wei Hui Jiang; Qian Wu; Jian Min Liu; Qing Xia Zhu; Li Feng Miao

doi:10.4028/www.scientific.net/AMR.538-541.2346

Paper Titles

Electrochemical Studies of some New Mannich Bases Compounds as Corrosion Inhibitors for Mild Steel in Acidic Media
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An Innovative Method on the Polyphosphate Determination in Aquatic Product with Interdiction of Polyphosphate Hydrolysis by Using Ion Chromatography
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Study on Purification Mechanism of Liquid Metal Flowing through Filter
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Effect of Chloric Ions and Temperature on the Pitting Corrosion Behavior of Supermartensitic Stainless Steel in CO₂-Saturated Chloride Solution
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Low Temperature Synthesis of Mullite Whisker by Nonhydrolytic Sol-Gel Process Combined with Molten Salt Method
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The Change of D-Electron Occupancy in TiNi and Ni3Ti Compounds Measured from the White-Line Intensity of Electron Energy Loss Spectroscopy
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Effects of Non-Ionic Surfactant on the Deep Temperature Flotation Agents of Hematite
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Kinetic Spectrophotometric Determination of Selenium (IV) by its Catalytic Effect on the Oxidation of Acid Chrome Blue K by Hydrogen Peroxide
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Study on Corrosion Resistance of Al, Ni Brass with Processing State
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 538-541Low Temperature Synthesis of Mullite Whisker by...

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

Abstract:

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.