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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 881-883Preparation of Nano t-ZrO2 Particle by the...

Preparation of Nano t-ZrO₂Particle by the Integrated Process of High-Gravity Field and Hydrothermal Crystallization

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Abstract:

ZrO₂nano-crystals have been prepared through the integrated process of high-gravity field and hydrothermal crystallization by using ZrOCl_2•8H₂O solution added scale 3mol% yttrium nitrate and precipitator ammonia. Precursor of ZrO₂powders was prepared by high-gravity field co-precipitation reaction. Then, the precursor crystallized by the hydrothermal method to obtain ZrO₂powders. The influence of hydrothermal crystallization temperature and hydrothermal crystallization time on crystal structure, morphology and grain size has been investigated. The structure, morphology and grain size of ZrO₂ were characterized by X-ray diffraction(XRD) , transmission electron microscopy( TEM).The sizes of pure tetragonal ZrO₂ nano-crystallites prepared by hydrothermal crystallizing at 175°C-200°C for 1-8h are observed to be typically in the rang of 4-10nm. What’s more, ZrO₂powders prepared from crystallizing at 200°C for 6h shows great crystallinity , uniformly particle size and low aggregate.

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Periodical:

Advanced Materials Research (Volumes 881-883)

Pages:

933-939

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.881-883.933

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Online since:

January 2014

Authors:

Si Wei Liu*, Ji Cheng Zhou, Rui Xing Liu

Keywords:

High-Gravity, Hydrothermal Synthesis, Nanometer ZrO₂, Rotating Bed with Helix Channels (RBHC)

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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