TY  - JOUR
AU  - Vojisavljević, Katarina
AU  - Chevreux, Pierrick
AU  - Jouin, Jenny
AU  - Malic, Barbara
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/747
AB  - In this study, we report on the acid-catalysed synthesis of La9.33Si6O26 from lanthanum nitrate or acetate and silicon ethoxide (TEOS) in the ethanol solvent, upon the transition from liquid to amorphous and crystalline phases. The similarity of the Fourier transform infrared spectra of the lanthanum-salt solutions and lanthanum-silicon sols indicates that the lanthanum environment is not changed in the reaction of the La-salt with TEOS. In the nitric-acid catalysed synthesis, the hydrolysis reaction was almost instantaneous, as a consequence of a higher amount of water in this system, which contributed to a high level of chemical heterogeneity in the product. The acetic acid-based synthesis ensured a good mixing of the reagents at the nanometre level, which gave rise to the formation of the pure La9.33Si6O26 powder upon heating at 900 degrees C, and single phase ceramics with 94 % relative density after sintering at 1400 degrees C for 3 h in air, which is 200 degrees C lower temperature then usually reported for the apatite material.
PB  - Slovensko Kemijsko Drustvo, Ljubljana
T2  - Acta Chimica Slovenica
T1  - Characterization of the Alkoxide-based Sol-gel Derived La9.33Si6O26 Powder and Ceramic
EP  - 541
IS  - 3
SP  - 530
VL  - 61
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_747
ER  - 

@article{
author = "Vojisavljević, Katarina and Chevreux, Pierrick and Jouin, Jenny and Malic, Barbara",
year = "2014",
abstract = "In this study, we report on the acid-catalysed synthesis of La9.33Si6O26 from lanthanum nitrate or acetate and silicon ethoxide (TEOS) in the ethanol solvent, upon the transition from liquid to amorphous and crystalline phases. The similarity of the Fourier transform infrared spectra of the lanthanum-salt solutions and lanthanum-silicon sols indicates that the lanthanum environment is not changed in the reaction of the La-salt with TEOS. In the nitric-acid catalysed synthesis, the hydrolysis reaction was almost instantaneous, as a consequence of a higher amount of water in this system, which contributed to a high level of chemical heterogeneity in the product. The acetic acid-based synthesis ensured a good mixing of the reagents at the nanometre level, which gave rise to the formation of the pure La9.33Si6O26 powder upon heating at 900 degrees C, and single phase ceramics with 94 % relative density after sintering at 1400 degrees C for 3 h in air, which is 200 degrees C lower temperature then usually reported for the apatite material.",
publisher = "Slovensko Kemijsko Drustvo, Ljubljana",
journal = "Acta Chimica Slovenica",
title = "Characterization of the Alkoxide-based Sol-gel Derived La9.33Si6O26 Powder and Ceramic",
pages = "541-530",
number = "3",
volume = "61",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_747"
}

Vojisavljević, K., Chevreux, P., Jouin, J.,& Malic, B.. (2014). Characterization of the Alkoxide-based Sol-gel Derived La9.33Si6O26 Powder and Ceramic. in Acta Chimica Slovenica
Slovensko Kemijsko Drustvo, Ljubljana., 61(3), 530-541.
https://hdl.handle.net/21.15107/rcub_rimsi_747

Vojisavljević K, Chevreux P, Jouin J, Malic B. Characterization of the Alkoxide-based Sol-gel Derived La9.33Si6O26 Powder and Ceramic. in Acta Chimica Slovenica. 2014;61(3):530-541.
https://hdl.handle.net/21.15107/rcub_rimsi_747 .

Vojisavljević, Katarina, Chevreux, Pierrick, Jouin, Jenny, Malic, Barbara, "Characterization of the Alkoxide-based Sol-gel Derived La9.33Si6O26 Powder and Ceramic" in Acta Chimica Slovenica, 61, no. 3 (2014):530-541,
https://hdl.handle.net/21.15107/rcub_rimsi_747 .