Synthesis and formation mechanism of submicrometre spherical cordierite powders by ultrasonic spray pyrolysis
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1997
Authors
Janaćković, Đorđe
Jokanović, Vukoman

Kostić-Gvozdenović, Ljiljana
Zec, Slavica

Uskoković, Dragan

Article (Published version)

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Cordierite powders containing very pure submicrometre spherical particles have been synthesized by the ultrasonic spray pyrolysis. Aqueous solutions of silicic acid, Al(NO3)(3) . 9H(2)O and MgCl2 . 6H(2)O were used as precursors. Scanning electron micrographs have shown that particle surfaces were smooth and the mean particle diameter was 0.834 mu m. For the estimation of chemical and phase composition and phase transformation temperatures, differential thermal analysis, thermogravimetric analysis, X-ray diffraction, energy dispersive spectroscopy and infrared analysis have been applied. It was found that during spray pyrolysis, the condensation of silicic acid mostly occurred while aluminium and magnesium ion remained incorported between Si-O-Si chains. By subsequent heating to over 800 degrees C, Si-O-M bonds (M = Al, Mg) were formed. The synthesis of cordierite occurred by the crystallization of mu-cordierite from the amorphous phase at 900 degrees C followed by the phase transforma...tion of mu- into alpha-cordierite in the temperature range 1100-1200 degrees C.
Source:
Journal of Materials Science, 1997, 32, 1, 163-168Publisher:
- Chapman Hall Ltd, London
DOI: 10.1023/A:1018595720313
ISSN: 0022-2461
WoS: A1997WC32500023
Scopus: 2-s2.0-0039673380
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Janaćković, Đorđe AU - Jokanović, Vukoman AU - Kostić-Gvozdenović, Ljiljana AU - Zec, Slavica AU - Uskoković, Dragan PY - 1997 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/119 AB - Cordierite powders containing very pure submicrometre spherical particles have been synthesized by the ultrasonic spray pyrolysis. Aqueous solutions of silicic acid, Al(NO3)(3) . 9H(2)O and MgCl2 . 6H(2)O were used as precursors. Scanning electron micrographs have shown that particle surfaces were smooth and the mean particle diameter was 0.834 mu m. For the estimation of chemical and phase composition and phase transformation temperatures, differential thermal analysis, thermogravimetric analysis, X-ray diffraction, energy dispersive spectroscopy and infrared analysis have been applied. It was found that during spray pyrolysis, the condensation of silicic acid mostly occurred while aluminium and magnesium ion remained incorported between Si-O-Si chains. By subsequent heating to over 800 degrees C, Si-O-M bonds (M = Al, Mg) were formed. The synthesis of cordierite occurred by the crystallization of mu-cordierite from the amorphous phase at 900 degrees C followed by the phase transformation of mu- into alpha-cordierite in the temperature range 1100-1200 degrees C. PB - Chapman Hall Ltd, London T2 - Journal of Materials Science T1 - Synthesis and formation mechanism of submicrometre spherical cordierite powders by ultrasonic spray pyrolysis EP - 168 IS - 1 SP - 163 VL - 32 DO - 10.1023/A:1018595720313 ER -
@article{ author = "Janaćković, Đorđe and Jokanović, Vukoman and Kostić-Gvozdenović, Ljiljana and Zec, Slavica and Uskoković, Dragan", year = "1997", abstract = "Cordierite powders containing very pure submicrometre spherical particles have been synthesized by the ultrasonic spray pyrolysis. Aqueous solutions of silicic acid, Al(NO3)(3) . 9H(2)O and MgCl2 . 6H(2)O were used as precursors. Scanning electron micrographs have shown that particle surfaces were smooth and the mean particle diameter was 0.834 mu m. For the estimation of chemical and phase composition and phase transformation temperatures, differential thermal analysis, thermogravimetric analysis, X-ray diffraction, energy dispersive spectroscopy and infrared analysis have been applied. It was found that during spray pyrolysis, the condensation of silicic acid mostly occurred while aluminium and magnesium ion remained incorported between Si-O-Si chains. By subsequent heating to over 800 degrees C, Si-O-M bonds (M = Al, Mg) were formed. The synthesis of cordierite occurred by the crystallization of mu-cordierite from the amorphous phase at 900 degrees C followed by the phase transformation of mu- into alpha-cordierite in the temperature range 1100-1200 degrees C.", publisher = "Chapman Hall Ltd, London", journal = "Journal of Materials Science", title = "Synthesis and formation mechanism of submicrometre spherical cordierite powders by ultrasonic spray pyrolysis", pages = "168-163", number = "1", volume = "32", doi = "10.1023/A:1018595720313" }
Janaćković, Đ., Jokanović, V., Kostić-Gvozdenović, L., Zec, S.,& Uskoković, D.. (1997). Synthesis and formation mechanism of submicrometre spherical cordierite powders by ultrasonic spray pyrolysis. in Journal of Materials Science Chapman Hall Ltd, London., 32(1), 163-168. https://doi.org/10.1023/A:1018595720313
Janaćković Đ, Jokanović V, Kostić-Gvozdenović L, Zec S, Uskoković D. Synthesis and formation mechanism of submicrometre spherical cordierite powders by ultrasonic spray pyrolysis. in Journal of Materials Science. 1997;32(1):163-168. doi:10.1023/A:1018595720313 .
Janaćković, Đorđe, Jokanović, Vukoman, Kostić-Gvozdenović, Ljiljana, Zec, Slavica, Uskoković, Dragan, "Synthesis and formation mechanism of submicrometre spherical cordierite powders by ultrasonic spray pyrolysis" in Journal of Materials Science, 32, no. 1 (1997):163-168, https://doi.org/10.1023/A:1018595720313 . .