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The effect of nano-TiO2 addition on the properties of mullite-zirconia composites prepared by slip casting

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Author(s): Badiee S.H. | Otroj S. | Rahmani M.

Journal: Science of Sintering
ISSN 0350-820X

Volume: 44;
Issue: 3;
Start page: 341;
Date: 2012;
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Keywords: nano-TiO2 | kompoziti | mulit-cirkonijum | t-ZrO2 | mikrostrukture

ABSTRACT
The mullite-zirconia composites were prepared by reaction-sintering of alumina and zircon powder. Besides, the slip casting method was employed for fabrication of these composites. Then, the effect of nano-TiO2 addition on the properties of these composites was investigated and the results were compared with micro-sized TiO2. Hence, the physical properties, phase composition, flexural strength and microstructure of these composites after firing at 1600°C were studied. The results showed that the flexural strength of composite tends to increase with the addition of 0.5 wt.% nano-TiO2. It is attributed to the formation of larger size rod-like ZrO2 and enhanced ceramic bonding between them.

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