Preparation and Characterization of ZrO2 Coating by Sol-Gel on Mullite Short Fiber

Ying Na Zhao; Meng Zhang; Jiang Ren; Xiong Feng Zeng

doi:10.4028/www.scientific.net/KEM.591.66

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 591Preparation and Characterization of ZrO2 Coating...

Preparation and Characterization of ZrO₂ Coating by Sol-Gel on Mullite Short Fiber

Abstract:

The modified mullite fiber was used to toughen the mullite ceramic, which can effectively overcome the brittleness of ceramic materials and improve the material strength and toughness. Using 8ZrOCl₂•H₂O as precursor, anhydrous ethanol as solvent, H₂O₂ as hydrolysis promoter and NH₃·H₂O as precipitant, the stable and transparent zirconium sol could be obtained by sol-gel process, which coated mullite short fiber. The results showed that the stable and transparent ZrO₂ sol was obtained when pH value was 3.8~4.8 and reaction temperature was at 25°C. XRD results indicated that monoclinic ZrO₂ particles grew up and formed after heat-treatment at 700°C. The coating ZrO₂ film combined with mullite fiber homogeneously and closely, and the film thickness was about 1 μm.

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Periodical:

Key Engineering Materials (Volume 591)

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66-69

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.591.66

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Online since:

November 2013

Authors:

Ying Na Zhao, Meng Zhang, Jiang Ren, Xiong Feng Zeng

Keywords:

Coating Process, Short Mullite Fiber, Sol-Gel, ZrO₂ Coatings

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