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Al-Doped Apatite-Type Nanocrystalline Lanthanum Silicates Prepared by Mechanochemical Synthesis: Phase, Structural and Microstructural Study Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Conference E-MRS 2007 Fall Meeting, Symposium - Chemistry and Processes for the Design of Metal Oxide Nanoparticles
17-21 Sep 2007 , Warsaw
Journal European Journal of Inorganic Chemistry
ISSN: 1434-1948 , E-ISSN: 1099-0682
Output data Year: 2008, Number: 6, Pages: 939-947 Pages count : 9 DOI: 10.1002/ejic.200700972
Tags Apatite-type silicates, Conducting materials, Doping, Formation mechanism, Mechanochemical synthesis
Authors Kharlamova Tamara 1 , Pavlova Svetlana 1 , Sadykov Vladislav 1 , Chaikina Marina 2 , Krieger Tamara 1 , Lapina Olga 1 , Khabibulin Dzhalil 1 , Ishchenko Arcady 1 , Zaikovskii Vladimir 1 , Argirusis Christos 3 , Frade Jorge 4
Affiliations
1 Boreskov Institute of Catalysis SB RAS, pr. Lavrentieva, 5, 630090 Novosibirsk, Russia
2 Institute of Solid State Chemistry and Mechanochemistry SB RAS, Kutatetadze Street, 18, 630128 Novosibirsk, Russia
3 Clausthal University of Technology, 38678 Clausthal-Zellerfeld, Germany
4 University of Aveiro, 3810-193 Aveiro, Portugal

Funding (1)

1 European Commission 33410 FP6-2004-NMP-TI-4 STREP MATSILC

Abstract: Al-doped La9.33+x/3+ySi6–xAlxO26+3y/2 (x = 0–1.5, y = 0–0.67) apatite-type lanthanum silicates (ATLS) were synthesized with a high-power (1200 rpm) planetary ball mill that allows the formation of the lanthanum silicate phase after milling for 20–35 min at room temperature. The apatite phase already appears after milling for 5 min. Phase, structural and microstructural studies on the nanocrystalline lanthanum silicates were carried out by using XRD, TEM, and IR, 27Al and 29Si MAS NMR spectroscopy to clarify the mechanism of ATLS formation. The cluster-topotactic mechanism of the formation of apatite by mechanochemical treatment involving hydration of the starting compounds and acid–base reactions is suggested. Al-doping results in promoting the formation of apatite. However, a secondary LaAlO3 phase may be present in the sample depending on its stoichiometry. This suggests the existence of a biphase domain in the La2O3–SiO2–Al2O3 phase diagram at room temperature, in which Al-doped apatite and LaAlO3 phases coexist.
Cite: Kharlamova T. , Pavlova S. , Sadykov V. , Chaikina M. , Krieger T. , Lapina O. , Khabibulin D. , Ishchenko A. , Zaikovskii V. , Argirusis C. , Frade J.
Al-Doped Apatite-Type Nanocrystalline Lanthanum Silicates Prepared by Mechanochemical Synthesis: Phase, Structural and Microstructural Study
European Journal of Inorganic Chemistry. 2008. N6. P.939-947. DOI: 10.1002/ejic.200700972 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: Sep 14, 2007
Published online: Jan 10, 2008
Published print: Feb 1, 2008
Identifiers:
publication_identifier.wos_identifier_type WOS:000254593900018
publication_identifier.scopus_identifier_type 2-s2.0-48349097682
publication_identifier.rinz_identifier_type 13589454
publication_identifier.accession_number_identifier_type 2008:510406
publication_identifier.chemical_accession_number_identifier_type 151:20827
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