不同碳源对纳米锌铝尖晶石合成及颗粒粒径的影响<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.018.022

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Abstract Nano ZnAl₂O₄ powders were prepared by sol-gel method with aluminum nitrate, zinc nitrate and citric acid as star-ting material, carbon black and phenolic formaldehyde resin as carbon source. Effect of different carbon source on synthesis and particle size of nano-ZnAl₂O₄ were studied in reducing atmosphere at high temperature, comparing with samples which conducted heat treatment in air without carbon addition. The results showed that XRD peaks of samples with carbon addition were not detected after heat treatment at 600 ℃ in reducing atmosphere. The reason was that carbon acts as steric hindrance, which inhibited ions movement. Nano ZnAl₂O₄ with fine particles (20—30 nm) could be synthesized at 800 ℃ with carbon addition, and nano-ZnAl₂O₄ particle size was almost no change when the temperature increased from 800 ℃ to 1 000 ℃. Carbon surrounding the ZnAl₂O₄ particles prevented effectively the growth and sintering of the particles. Phenolic resin was better than carbon black for inhibiting ZnAl₂O₄ particle growth, which might be phenolic resin carbonized with some glassy carbon, leading to better retarding effect. But when the temperature was no less than 1 200 ℃, ZnAl₂O₄ was easy to react with CO or C to form volatile Zn(g), there was only single crystal phase α-Al₂O₃. However, nano-ZnAl₂O₄ particles could be synthesized at 600 ℃ in air without carbon addition, but the particles increased noticeably (from 27.5 nm to 54.6 nm) with temperature increasing from 600 ℃ to 800 ℃, and the particles exhibited sintered state.

Key words： sol-gel method zinc aluminum spinel phenolic formaldehyde resin carbon black nano particles

Published: 08 May 2018

CLC number:

TB35

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	Articles by authors
	WEN Yubin
	LIU Xinhong
	GU Qiang
	CHEN Xiaoyu
	JIA Quanli
	YANG Lin
	MA Teng

Cite this article:

WEN Yubin,LIU Xinhong,GU Qiang, et al. Effect of Carbon Source on Synthesis and Particle Size of Nano-ZnAl₂O₄[J]. Materials Reports, 2017, 31(18): 109-113.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.018.022 OR http://www.mater-rep.com/EN/Y2017/V31/I18/109

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