Effect of Sodium on Crystallite Size and Surface Area of Zirconia Powders at Elevated Temperatures

Fine ZrO2 powders were synthesized by an aqueous precipitation method using zirconyl nitrate. By adding the precursor salt to NaOH, single‐phase ZrO2 powders were formed, and the monoclinic phase did not appear upon heat treatment up to 1000°C. The samples were digested in NaOH for different amounts...

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Published in:Journal of the American Ceramic Society 2000-08, Vol.83 (8), p.2055-2061
Main Authors: Chang, Hsiao-Lan, Shady, Phillip, Shih, Wei-Heng
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Language:English
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surface area
synthesis
zirconia
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description Fine ZrO2 powders were synthesized by an aqueous precipitation method using zirconyl nitrate. By adding the precursor salt to NaOH, single‐phase ZrO2 powders were formed, and the monoclinic phase did not appear upon heat treatment up to 1000°C. The samples were digested in NaOH for different amounts of time. Different levels of washing of digested samples produced surface area at 900°C for 4 h ranging from 8 to 100 m2/g. It was found that the properties of the powders at elevated temperatures were sensitive to the sodium content. The surface area decreased while the crystallite size and pore size of the samples increased with increased sodium content. Our results indicated that sodium is detrimental to the stabilization of surface area at elevated temperatures.
doi_str_mv 10.1111/j.1151-2916.2000.tb01511.x
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subjects surface area
synthesis
zirconia
title Effect of Sodium on Crystallite Size and Surface Area of Zirconia Powders at Elevated Temperatures
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