微波热处理温度对尾矿微晶玻璃晶化过程及性能的影响

doi:10.11896/cldb.18090017

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Abstract CCaO-MgO-Al₂O₃-SiO₂(CMAS)base glasses were prepared by the traditional melting-casting method using gold tailings and iron tailings as main materials, and crystallized in a 2.45 GHz multimode microwave cavity. The effect of microwave heat treatment temperature on the crystallization and properties was systematically investigated by differential thermal analysis (DSC),X-ray diffraction analysis (XRD),Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and universal mechanical properties tester, etc. The results show that: the tailing-based glass-ceramics with diopside(Mg_0.6Fe_0.2Al_0.2)Ca(Si_1.5Al_1.5)O₆ as the primary crystalline phase was successfully synthesized by microwave heat treatment technology. Moreover, the performance of the prepared glass-ceramics were remarkably improved with heat treatment temperature increasing. Optimum technology parameters is heat treatment at 720 ℃for 20 min. The prepared glass ceramics possess excellent comprehensive performance: density of 2.97 g/cm³, bending strength of 264.62 MPa, acid resistance of 99.38%, alkali resistance of 99.17%, elastic modulus of 109.83 GPa, and shear modulus of 45.39 GPa, respectively.

Key words： tailings glass-ceramic CMAS microstructure

Published: 29 August 2019

CLC number:

TQ174

About author:: Hongxia Lireceived her Ph.D. degree in materials processing engineering materials from Inner Mongolia University of Technology in 2017. She is currently a research assistant in Inner Mongolia University of Science and technology, focusing on the research of microwave metallurgy and glass-ceramic technology.

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	LI Hongxia
	LI Baowei
	DENG Leibo
	XU Pengfei
	LIU Zhongxing

Cite this article:

LI Hongxia,LI Baowei,DENG Leibo, et al. Effects of Microwave Heat Treatment Temperature on Crystallization and Properties of Tailing-based Glass-Ceramics[J]. Materials Reports, 2019, 33(20): 3401-3407.

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http://www.mater-rep.com/EN/10.11896/cldb.18090017 OR http://www.mater-rep.com/EN/Y2019/V33/I20/3401

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