Effect of Al3+ Additions on the Properties of Quartz Ceramics

Xiao Mei Han; Li Zhang; Jia Lu

doi:10.4028/www.scientific.net/KEM.512-515.551

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 512-515Effect of Al3+ Additions on the Properties of...

Effect of Al³⁺ Additions on the Properties of Quartz Ceramics

Abstract:

Quartz ceramic has a great potential use in engineering ceramic materials. However, due to the cristobalite transformation in sintering process, the mechanical properties are weakened. The influence of Al3+ additions on bending strength and open porosity of quartz ceramics was determined by adding Al2O3 (sample 1) and aluminum sulfate solution (sample 2). The content of Al3+ ranged from 1% to 7%. Both samples were sintered at 1200°C for 2h. The bulk density of samples was measured by Archimede’s displacement method and the flexural strength of the specimens was tested using a conventional three point flexural method. The addition of 3% Al3+ of aluminum sulfate leads to better properties (bending strength at 14Mpa and open porosity at 23%). Glass theory was applied to explain the mechanisms of inhibiting crystallization of Al3+ additions.

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Key Engineering Materials (Volumes 512-515)

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551-554

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https://doi.org/10.4028/www.scientific.net/KEM.512-515.551

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June 2012

Authors:

Xiao Mei Han, Li Zhang, Jia Lu

Keywords:

Amorphous SiO₂, Inhibition, Mechanical Property, Open Porosity, Quartz Ceramic

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