Zirconium oxynitrate

Aqueous solutions of zirconium oxide dinitrate [13826-66-9] (zirconium oxynitrate) and zirconium oxychloride behave very similarly these two compounds have been cocrystallized in soHd solution (202) where ZrO(N03 -5H2 O was the stable hydrate. 

Zirconium oxychloride (or zirconium oxynitrate) was mixed with urea, nitric acid and water in an evaporating dish, and then thermolyzed in a muffle furnace at a fixed temperature about 10 minutes. This led to samples with a foam structure. The samples were then characterized by physical adsorption of N at 77K (ASAP-2000), TEM (H-600II) and XRD (D/max-yA). 

Zr02 zirconium oxynitrate NP5 + NP9 (l l)/cyclohexane/ammonia 5-20 Support material 61 3... 

Y203/Zr02 zirconium oxynitrate Brij 30/cyclohexane/water 8 Support material 64 2 S 00... 

Zirconia has been synthesized by hydrolysis of zirconium tetrabutoxide in the water pools of reverse microemulsions . Kawai et al. investigated the relationship between particle formation and the solubilized states of water in the reaction system. The results indicate that monodisperse, spherical particles are more easily obtained in reverse and swollen micelles than in a w/o microemulsion. Crystalline Zr02 particles were achieved after calcination at 800 °C. The use of zirconium oxynitrate as precursor is also reported in the literature By reacting a microemulsion containing this precursor with a microemulsion containing aqueous ammonia as water phase, the calcination temperature for obtaining crystalline zirconia could be reduced to 362 °C. 

Zr02 zirconium oxynitrate NP5 -1- NP9 (2 l)/cyclohexane/ oxalic acid 295-559 50 Support material 60... 

A complete range of metastable cerium-zirconium mixed metal oxide powders (CexZr(i.x)Oy, 0 < X < 1) were prepared through a similar hydroxide precipitation technique reported by Hori, et al. [11]. Cerium (IV) ammonium nitrate and zirconium oxynitrate precursors are completely dissolved in de-ionized water with mild heat and precipitated through the addition of excess ammonium hydroxide (-100 vol%). The ceria-zirconia is thoroughly washed with excess distilled water and allowed to evaporate to dryness overnight. The ceria-zirconia system is calcined in atmosphere for 1 hour at 773 K and subsequently milled into a fine powder. The model ceria-zirconia catalysts are prepared from the ground cerium-zirconium oxide powders using a 13 mm diameter pellet die and hydraulic press. 

Liu D., Zhang H., Cai W., Wu X., Zhao L. Synthesis of PZT nanocrystalline powder by a modified sol-gel process using zirconium oxynitrate as zirconium source. Mater. Chem. Phys. 1997 51 186-189... 

Most of the ZrOz dealt with in this sections was prepared by calcining zirconium hydroxide at various temperatures in air for several hours and evacuating at the calcination temperatures for 2 h before use. The zirconium hydroxide was obtained by hydrolysis of zirconium oxychloride with 28% aqueous ammonia, followed by washing with deionized water until no chloride ion was detected in the filtrate and drying at 373 K for 24 In some cases, zirconium oxynitrate was used instead of oxychlo-... 

Four years later, Komarneni and coworkers reported the use of zirconia nanoparticles of approximately 10 nm diameter as seeds for the sol- el-based preparation of zircon [37]. The hydrothermal treatment of zirconyl oxynitrate and zirconium oxychloride thereby enabled these authors to prepare stable sols of crystalline zirconia nanoparticles of 70nm and lOnm in size, respectively. Some transmission electron microscopy (TEM) images of the nanoparhcles obtained are shown in Figure 8.1. 

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