Synthesis of high-purity submicrometer spherical particles of oc-alumina is performed by ultrasonic spray pyrolysis. As precursors, 0.5 M water solutions of both AlCl3 . 6H(2)O and Al(NO3)(3) . 9H(2)O have been used. The influence of aerosol droplet genesis on the particle size distribution of alpha-alumina is regarded as a main control parameter. In the case of very fine droplets (smaller than 0.3 mu m), regardless of the precursor, the precipitation of dissolved compound inside the droplet occurs by the volume precipitation mechanism. Morphology of the particles corresponds to that of the realized aerosol droplets. An increased activity of produced powders enables the phase transformation of gamma- to alpha-alumina in the temperature range 1073 similar to 1173 K, while at 1273 K the transformation process is complete.
TY - JOUR
AU - Jokanović, Vukoman
AU - Janaćković, Đorđe
AU - Spasić, Aleksandar
AU - Uskoković, Dragan
PY - 1996
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/95
AB - Synthesis of high-purity submicrometer spherical particles of oc-alumina is performed by ultrasonic spray pyrolysis. As precursors, 0.5 M water solutions of both AlCl3 . 6H(2)O and Al(NO3)(3) . 9H(2)O have been used. The influence of aerosol droplet genesis on the particle size distribution of alpha-alumina is regarded as a main control parameter. In the case of very fine droplets (smaller than 0.3 mu m), regardless of the precursor, the precipitation of dissolved compound inside the droplet occurs by the volume precipitation mechanism. Morphology of the particles corresponds to that of the realized aerosol droplets. An increased activity of produced powders enables the phase transformation of gamma- to alpha-alumina in the temperature range 1073 similar to 1173 K, while at 1273 K the transformation process is complete.
PB - Japan Inst Metals & Materials, Sendai
T2 - Materials Transactions Jim
T1 - Synthesis and formation mechanism of ultrafine spherical Al2O3 powders by ultrasonic spray pyrolysis
EP - 635
IS - 4
SP - 627
VL - 37
DO - 10.2320/matertrans1989.37.627
ER -
@article{
author = "Jokanović, Vukoman and Janaćković, Đorđe and Spasić, Aleksandar and Uskoković, Dragan",
year = "1996",
abstract = "Synthesis of high-purity submicrometer spherical particles of oc-alumina is performed by ultrasonic spray pyrolysis. As precursors, 0.5 M water solutions of both AlCl3 . 6H(2)O and Al(NO3)(3) . 9H(2)O have been used. The influence of aerosol droplet genesis on the particle size distribution of alpha-alumina is regarded as a main control parameter. In the case of very fine droplets (smaller than 0.3 mu m), regardless of the precursor, the precipitation of dissolved compound inside the droplet occurs by the volume precipitation mechanism. Morphology of the particles corresponds to that of the realized aerosol droplets. An increased activity of produced powders enables the phase transformation of gamma- to alpha-alumina in the temperature range 1073 similar to 1173 K, while at 1273 K the transformation process is complete.",
publisher = "Japan Inst Metals & Materials, Sendai",
journal = "Materials Transactions Jim",
title = "Synthesis and formation mechanism of ultrafine spherical Al2O3 powders by ultrasonic spray pyrolysis",
pages = "635-627",
number = "4",
volume = "37",
doi = "10.2320/matertrans1989.37.627"
}
Jokanović, V., Janaćković, Đ., Spasić, A.,& Uskoković, D.. (1996). Synthesis and formation mechanism of ultrafine spherical Al2O3 powders by ultrasonic spray pyrolysis. in Materials Transactions Jim
Japan Inst Metals & Materials, Sendai., 37(4), 627-635.
https://doi.org/10.2320/matertrans1989.37.627
Jokanović V, Janaćković Đ, Spasić A, Uskoković D. Synthesis and formation mechanism of ultrafine spherical Al2O3 powders by ultrasonic spray pyrolysis. in Materials Transactions Jim. 1996;37(4):627-635.
doi:10.2320/matertrans1989.37.627 .
Jokanović, Vukoman, Janaćković, Đorđe, Spasić, Aleksandar, Uskoković, Dragan, "Synthesis and formation mechanism of ultrafine spherical Al2O3 powders by ultrasonic spray pyrolysis" in Materials Transactions Jim, 37, no. 4 (1996):627-635,
https://doi.org/10.2320/matertrans1989.37.627 . .
