Geodesic
The effect of hydrolysis duration on the phase composition, texture, aggregation and agglomeration of ZrO$_2$ nanoparticles
Nanosistemy: fizika, himiâ, matematika, Tome 12 (2021) no. 4, pp. 472-480 Cet article a éte moissonné depuis la source Math-Net.Ru

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In this work, a number of ZrO$_2\cdot n$H$_2$O and ZrO$_2$ samples were synthesized by direct precipitation and hydrolysis with different duration (36 and 61 h) followed by neutralization and thermal treatment. The prepared samples were analyzed using DT-TGA, PXRD, N$_2$ physisorption and LD methods. The dependence of the size of crystallites and secondary particles, phase composition, texture, and particle morphology on the amount of zirconium hydrolyzed to form $m$-ZrO$_2$ is shown. The possibility of regulating the phase composition of ZrO$_2$ has been established while maintaining the specific surface area (110 – 120 m$^2$/g), as well as creating a hierarchical system of micro-mesopores. The mechanism of the ZrO$_2\cdot n$H$_2$O formation during hydrolysis and precipitation is considered. The size of the critical nucleus is estimated (1.5 – 2 nm).
Keywords: zirconia, hydrolysis, texture, aggregation, agglomeration, mechanism.
Mots-clés : phase composition 
@article{NANO_2021_12_4_a8,
     author = {Sh. O. Omarov},
     title = {The effect of hydrolysis duration on the phase composition, texture, aggregation and agglomeration of {ZrO}$_2$ nanoparticles},
     journal = {Nanosistemy: fizika, himi\^a, matematika},
     pages = {472--480},
     year = {2021},
     volume = {12},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NANO_2021_12_4_a8/}
}
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Sh. O. Omarov. The effect of hydrolysis duration on the phase composition, texture, aggregation and agglomeration of ZrO$_2$ nanoparticles. Nanosistemy: fizika, himiâ, matematika, Tome 12 (2021) no. 4, pp. 472-480. http://geodesic.mathdoc.fr/item/NANO_2021_12_4_a8/