<abstract xmlns="http://www.w3.org/1999/xhtml">Calcination and microwave-assisted hydrothermal processing of precipitated zirconium dioxide are compared. Characterization of synthesized products of these two technologies is presented. The infiuence of thermal treatment up to 1200oC on the structural and spectroscopic properties of the so-obtained zirconium dioxide is examined. It was found that initial crystallization of material inhibits the crystal growth up to the 800oC (by means of XRD and TEM techniques), while the material crystallized from amorphous hydroxide precursor at 400oC, exhibits 26 nm sized crystallites already. It was found using the TG technique that the temperature range 100–200oC during the calcination process is equivalent to a microwave hydrothermal process by means of water content. Mass loss is estimated to be about 18%. Based on X-ray investigations it was found that the initial hydroxide precursor is amorphous, however, its luminescence activity suggests the close range ordering in a material.</abstract>

Calcination and microwave-assisted hydrothermal processing of precipitated zirconium dioxide are compared. Characterization of synthesized products of these two technologies is presented. The infiuence of thermal treatment up to 1200oC on the structural and spectroscopic properties of the so-obtained zirconium dioxide is examined. It was found that initial crystallization of material inhibits the crystal growth up to the 800oC (by means of XRD and TEM techniques), while the material crystallized from amorphous hydroxide precursor at 400oC, exhibits 26 nm sized crystallites already. It was found using the TG technique that the temperature range 100–200oC during the calcination process is equivalent to a microwave hydrothermal process by means of water content. Mass loss is estimated to be about 18%. Based on X-ray investigations it was found that the initial hydroxide precursor is amorphous, however, its luminescence activity suggests the close range ordering in a material.

High Pressure Synthesis versus Calcination – Different Approaches to Crystallization of Zirconium Dioxide

Institute of Physics of the Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

West Pomeranian University of Technology, Szczecin, Institute of Chemical and Environment Engineering, ul. Pułaskiego 10, 70-322 Szczecin, Poland

Polish Journal of Chemical Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Calcination and microwave-assisted hydrothermal processing of precipitated zirconium dioxide are compared. Characterization of synthesized products of these...

High Pressure Synthesis versus Calcination – Different Approaches to Crystallization of Zirconium Dioxide

Pubblicato online: 26 giu 2014

Pagine: 99 - 105

DOI: https://doi.org/10.2478/pjct-2014-0038

Parole chiave
microwave, hydrothermal technology, zirconium dioxide, calcination

© 2014 Jarosław Kaszewski et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

High Pressure Synthesis versus Calcination – Different Approaches to Crystallization of Zirconium Dioxide

Pubblicato online: 26 giu 2014

Pagine: 99 - 105

DOI: https://doi.org/10.2478/pjct-2014-0038

Parole chiavemicrowave, hydrothermal technology, zirconium dioxide, calcination

© 2014 Jarosław Kaszewski et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Parole chiave
microwave, hydrothermal technology, zirconium dioxide, calcination