化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (9) : 161-164.

科学研究

溶胶-凝胶法制备ZrO₂材料的微观结构与热稳定性研究

杨靖, 李淋钰, 赵亚梅, 李红玑

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Study on microstructure and thermal stability of ZrO₂ prepared by sol-gel method

Yang Jing, Li Linyu, Zhao Yamei, Li Hongji

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文章历史 +

Received
2017-05-08
Issue Date	Revised Date
2018-11-05	2017-05-08

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摘要

以无机盐五水硝酸锆[Zr(NO₃)₄·5H₂O]为前驱体,采用溶胶-凝胶法制备二氧化锆(ZrO₂)材料,借助X射线衍射(XRD)、红外光谱(FT-IR)、热重(TG-DTG)、能谱(EDS)、扫描电镜(SEM)和N₂吸附-脱附等测试方法,研究中低温焙烧对ZrO₂材料微观结构和热稳定性的影响。结果表明,随着焙烧温度的不断升高,ZrO₂的晶型发生两次转化,先由无定型转化为四方相,进而变为单斜相,400℃焙烧的ZrO₂材料热稳定性良好,结构致密,四方相ZrO₂结晶度高达88.86%,晶粒尺寸为10.10nm,平均孔径为3.13nm,比表面积为24.74m²/g。

Abstract

ZrO₂ was prepared by sol-gel method using inorganic salt Zr(NO₃)₄·5H₂O as precursor.The materials were characterized by X-ray diffraction (XRD),infrared spectroscopy (FT-IR),thermogravimetry (TG-DTG),energy dispersive spetroscopy (EDS),scanning electron microscopy(SEM) and N₂ adsorption-desorption measurement.The effects of low temperature calcination on the microstructure and thermal stability of ZrO₂ were studied.The results showed that with the increase of calcination temperature,the crystal form of ZrO₂ underwent two conversions,which were first transformed into tetraginal phase,and then into monoclinic phase.ZrO₂ material calcined at 400℃ was dense and thermally stable with a average pore size of 3.13nm and specific surface area of 24.74m²/g.The crystallility of tetragonal phase ZrO₂ was up to 88.86% and the grain size of 10.10nm.

关键词

溶胶-凝胶法 / ZrO₂材料 / 热稳定性 / 微观结构

Key words

sol-gel method / ZrO₂ material / thermal stability / microstructure

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溶胶-凝胶法制备ZrO₂材料的微观结构与热稳定性研究[J]. 化工新型材料, 2018, 46(9): 161-164 DOI:

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