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The Effect of Different Colloidal Silica Binders on Strengths of Corundum-Mullite Castables

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Abstract:

Three kinds of colloidal silica (GS-30, AM and HS-30) were applied as binders to corundum-mullite castables. The apparent porosity and cold modulus of rupture for samples fired at 800 oC and 1000 oC were compared. The fractography of colloidal silica bonded corundum-mullite castables was carried out by slit island method. The microstructure of fracture surface was characterized by scanning electron microscope. The results showed that castables by using imported colloidal silica (AM and HS-30) presented higher strength than those with domestic (GS-30), which was determined by the activity of silica and modified ion. The difference of the size distribution of the salient on the fracture surfaces indicated that the strength of castables was dependent on the bonding among the components.

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Periodical:

Advanced Materials Research (Volume 1094)

Pages:

127-130

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1094.127

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Online since:

March 2015

Authors:

Wen Jie Yuan*, Qing You Zhu, Cheng Ji Deng, Hong Xi Zhu

Keywords:

Castables, Cold Modulus of Rupture, Colloidal Silica

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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