Synthesis of nanoscale zirconium dioxide powders and composites on their basis in thermal DC Plasma

Самохин, А. В.; Sinayskiy, M. A.; Alexeev, N.; Ризаханов, Р. Н.; Tsvetkov, Yu. V.; Litvinova, I. S.; Barmin, A. A.

doi:10.1134/s2075113315050172

Cited by 8 publications

(2 citation statements)

References 4 publications

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“…with [21] can be due to the lognormal distribution of the particles residence time in the growth zone. For the nanoparticles syntheses ( Table 1) where formation of particles occurs through various macro mechanisms, it has been experimentally established that the average size of the nanoparticles increases with increasing concentration of the gas component precursor [22][23][24][25][26][27][28][29][30].…”

Section: Powder Technologymentioning

confidence: 99%

Nanopowders Production and Micron-Sized Powders Spheroidization in DC Plasma Reactors

Самохин¹,

Алексеев²,

Sinayskiy³

et al. 2018

Powder Technology

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Technology for metal and inorganic compounds nanopowders production in DC arc plasma reactors has been developed. Similar DC arc plasma reactors were used for micronsized powders spheroidization. Results of experimental studies are presented. Formation of nanoparticles via different mechanisms as well as mass transfer of nanopowders to the reactor cooling surfaces are discussed. Heat flux distribution along the reactor wall and its influence on the evolution of nanoparticles in the deposited layer are investigated. Effects of plasma torch and confined jet reactor operation parameters on the granulometric, phase and chemical composition of nanopowders are discussed. Potential of the confined plasma jet apparatus for micron-sized metal and composite particles spheroidization is demonstrated.

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Section: Powder Technologymentioning

confidence: 99%

Nanopowders Production and Micron-Sized Powders Spheroidization in DC Plasma Reactors

Самохин¹,

Алексеев²,

Sinayskiy³

et al. 2018

Powder Technology

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“…The strong bond between zirconia and silica, both chemically and physically, causes high enough stability making it difficult to carry out the zircon decomposition process. There are various methods of purifying zirconia, including chlorination and thermal dissociation methods [4], dissociation from alkali oxide, zirconia plasma method [5], citrate technique, hydrothermal [6], electrodeposition , IOP Publishing doi:10.1088/1742-6596/2780/1/012016 2 solvothermal, sol-gel [7], alkali fusion method, and coprecipitation [8]. In general, the purification method goes through three stages, namely chemical or thermal decomposition of zircon, then selective dissolution of zircon in a solvent, and separation of remaining impurities in the zirconium compound [9].…”

Section: Introductionmentioning

confidence: 99%

The effects of calcination heating rate on phase formation and structure of zircon sand-derived zirconia

Eka Wahyuni,

Hariyanto,

Yan Pratama

et al. 2024

J. Phys.: Conf. Ser.

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Phase formation and structure examination has been conducted to study the effects of thermal treatment and heating rates on zircon (ZrSiO4) sand-derived zirconia (ZrO2). A preliminary investigation of the elements present in the sand using XRF revealed that Zr was the major element, corresponding to 92.4% of the sample. The zirconia precursor was synthesized through a three-stage process that involves purifying zircon powder, alkali fusion, and co-precipitation method. The zirconia crystal was obtained by heating the sample to 700, 800 and 900 °C with heating rates of 5 and 10 °C/min, respectively. The formation of tetragonal zirconia (t-ZrO2) with space group P42/nmc is shown in a qualitative study of all sample XRD patterns. Furthermore, Rietveld analysis was used to determine crystal structure parameters including lattice parameters and tetragonality. The calcination temperature and heating rate decide the phase, t-ZrO2 crystallite size, and tetragonality. Furthermore, calcining to 700 and 800 °C created t-ZrO2, however, elevated temperature to 900 °C lead to t→m transformation. The t-ZrO2 size increases with temperature between 700 and 900 °C, range of 9 and 15 nm. Meanwhile, the tetragonality of t-ZrO2 tends to decrease due to m-ZrO2 being present.

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Transparent aluminium ceramics: fabrication techniques, setbacks and prospects

Salifu

Olubambi

2022

J. Korean Ceram. Soc.

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Synthesis of nanoscale zirconium dioxide powders and composites on their basis in thermal DC Plasma

Cited by 8 publications

References 4 publications

Nanopowders Production and Micron-Sized Powders Spheroidization in DC Plasma Reactors

Nanopowders Production and Micron-Sized Powders Spheroidization in DC Plasma Reactors

The effects of calcination heating rate on phase formation and structure of zircon sand-derived zirconia

Transparent aluminium ceramics: fabrication techniques, setbacks and prospects

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