Regular paperThe effect of mechanical treatment of zirconium(IV) hydroxide on its thermal behaviour
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Synthesis of HfO<inf>2</inf> from hafnium hydroxide hydrate
2019, Journal of Alloys and CompoundsCitation Excerpt :The latter process was spread in time and was not accompanied by a significant heat effect. In a number of works [27,30,44] it was shown that preliminary treatment (hydrothermal, ultrasound, mechanical) could have an effect on dynamics of phase transformations during heat treatment of zirconium and hafnium hydroxides. We made an assumption that similar effect might have preliminary heating of samples to the temperatures below crystallization temperature.
Study of structure-performance relationships in Meerwein-Ponndorf-Verley reduction of crotonaldehyde on several magnesium and zirconium-based systems
2012, Catalysis TodayCitation Excerpt :The first endothermic peak centered at 113 °C corresponds to the loss of water and is followed by an exothermic peak with a maximum at 330 °C which can be assigned to the oxidation of organic residues (i.e. propoxide coming from the zirconium precursor). Finally, the sharp exothermal peak at 435 °C (the so-called glow exotherm) is attributed to the crystallization of zirconia [38,39]. In the case of MgO-gel, the TGA profile shows the typical endothermal peak centered at 380 °C due to the transformation of Mg(OH)2 into MgO [40].
The crystallization process of HfO<inf>2</inf> and ZrO<inf>2</inf> under hydrothermal conditions
2005, Journal of Alloys and CompoundsSteam reforming of methanol to H<inf>2</inf> over nonreduced Zr-containing CuO/ZnO catalysts
2004, Journal of CatalysisInfluence of pH on the stability of low temperature t-ZrO<inf>2</inf>
1998, Journal of Physics and Chemistry of Solids