Effect of Zircon Content on the Microstructure and Physical Properties of Chamotte Refractories

Ruo Fei Xiang; Yuan Bing Li; Shu Jing Li; Xin Yan Ma; Ya Wei Li; Shao Bai Sang

doi:10.4028/www.scientific.net/KEM.697.604

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 697Effect of Zircon Content on the Microstructure and...

Effect of Zircon Content on the Microstructure and Physical Properties of Chamotte Refractories

Abstract:

In this work, chamotte with dispersions of up to 30wt% zircon is sintered at 1500 °C to investigate the effect of zircon content on the microstructure and physical properties of chamotte refractories. The microstructure and physical properties of samples are investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDS), three-point bending and dilatometer. The result shows that the main phases of chamotte with and without sintering at 1500 °C are mullite and cristobalite, the addition of zircon has no impact on the main phase compositions of chamotte matrix. For the sintered samples, zircon grains are wrapped with glass and no obvious bonding are detected between the interface of zircon and mullite grains. Increasing zircon content leads to the increase in bulk density and has a negative effect on the flexural strength, besides, linear thermal expansion ratio decreases as the zircon content increases.

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Periodical:

Key Engineering Materials (Volume 697)

Pages:

604-607

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.697.604

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Online since:

July 2016

Authors:

Ruo Fei Xiang, Yuan Bing Li*, Shu Jing Li, Xin Yan Ma, Ya Wei Li, Shao Bai Sang

Keywords:

Chamotte, Cristobalite, Flexural Strength, Zircon

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