skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Fast synthesis of La-substituted apatite by the dry mechanochemical method and analysis of its structure

Abstract

Compared to pure apatite, La-substituted apatites have improved thermal, mechanical and biological characteristics. In this article, a fast synthesis of La-substituted apatites by a dry mechanochemical method is presented. Structural studies by X-ray diffraction and Fourier transform infrared spectroscopy indicated the formation of a single-phase nanosized product after 30 min of high-energy ball milling of the reaction mixtures. The dry mechanochemical method is technologically attractive for the preparation of La-substituted apatites, as it allows reducing the processing time down to half an hour and does not require prolonged high-temperature annealing normally used in the synthesis practice of the substituted apatite. As the mechanochemically synthesized samples are nanosized, it is difficult to determine the details of their crystal structure by the Rietveld refinement method. Therefore, a series of the mechanochemically synthesized samples with different concentrations of lanthanum were annealed at 1000 °C for 5 h. It was found that the annealed powders are microcrystalline La-substituted apatites Ca{sub 10−x}La{sub x}(PO{sub 4}){sub 6}O{sub x}(OH){sub 2−x}, where 0 ≤ x ≤2. In their structure, the Ca{sup 2+} ions are replaced by the La{sup 3+} ions localized near the Ca2 sites, and the OH{sup -} groups are replaced by the O{sup 2-} ions in themore » hexagonal channels. - Highlights: • a new approach to the synthesis of La-substituted apatites is proposed. • dry mechanochemical method allows reducing the synthesis time down to 30 min. • the product of synthesis is single-phase with an average crystallite size of 20 nm. • the parameters and volume of the unit cell increase with dopant concentration. • La-substituted apatites are Ca{sub 10−x}La{sub x}(PO{sub 4}){sub 6}O{sub x}(OH){sub 2−x}, where 0 ≤ x ≤ 2.« less

Authors:
 [1]; ;  [1];  [1];  [2];  [3]
  1. Institute of Solid State Chemistry and Mechanochemistry SB RAS, Kutateladze street 18, Novosibirsk 630128 (Russian Federation)
  2. (Russian Federation)
  3. Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center 'Krasnoyarsk Science Center SB RAS', Akademgorodok 50/24, 660036 Krasnoyarsk (Russian Federation)
Publication Date:
OSTI Identifier:
22742020
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 252; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ANNEALING; APATITES; CALCIUM IONS; CRYSTAL STRUCTURE; DOPED MATERIALS; FOURIER TRANSFORM SPECTROMETERS; LANTHANUM IONS; SYNTHESIS; TEMPERATURE RANGE 0400-1000 K; X-RAY DIFFRACTION

Citation Formats

Bulina, Natalia V., E-mail: bulina@solid.nsc.ru, Chaikina, Marina V., Prosanov, Igor Yu., Dudina, Dina V., Lavrentyev Institute of Hydrodynamics SB RAS, Lavrentyev avenue 15, Novosibirsk 630090, and Solovyov, Leonid A. Fast synthesis of La-substituted apatite by the dry mechanochemical method and analysis of its structure. United States: N. p., 2017. Web. doi:10.1016/J.JSSC.2017.05.008.
Bulina, Natalia V., E-mail: bulina@solid.nsc.ru, Chaikina, Marina V., Prosanov, Igor Yu., Dudina, Dina V., Lavrentyev Institute of Hydrodynamics SB RAS, Lavrentyev avenue 15, Novosibirsk 630090, & Solovyov, Leonid A. Fast synthesis of La-substituted apatite by the dry mechanochemical method and analysis of its structure. United States. doi:10.1016/J.JSSC.2017.05.008.
Bulina, Natalia V., E-mail: bulina@solid.nsc.ru, Chaikina, Marina V., Prosanov, Igor Yu., Dudina, Dina V., Lavrentyev Institute of Hydrodynamics SB RAS, Lavrentyev avenue 15, Novosibirsk 630090, and Solovyov, Leonid A. Tue . "Fast synthesis of La-substituted apatite by the dry mechanochemical method and analysis of its structure". United States. doi:10.1016/J.JSSC.2017.05.008.
@article{osti_22742020,
title = {Fast synthesis of La-substituted apatite by the dry mechanochemical method and analysis of its structure},
author = {Bulina, Natalia V., E-mail: bulina@solid.nsc.ru and Chaikina, Marina V. and Prosanov, Igor Yu. and Dudina, Dina V. and Lavrentyev Institute of Hydrodynamics SB RAS, Lavrentyev avenue 15, Novosibirsk 630090 and Solovyov, Leonid A.},
abstractNote = {Compared to pure apatite, La-substituted apatites have improved thermal, mechanical and biological characteristics. In this article, a fast synthesis of La-substituted apatites by a dry mechanochemical method is presented. Structural studies by X-ray diffraction and Fourier transform infrared spectroscopy indicated the formation of a single-phase nanosized product after 30 min of high-energy ball milling of the reaction mixtures. The dry mechanochemical method is technologically attractive for the preparation of La-substituted apatites, as it allows reducing the processing time down to half an hour and does not require prolonged high-temperature annealing normally used in the synthesis practice of the substituted apatite. As the mechanochemically synthesized samples are nanosized, it is difficult to determine the details of their crystal structure by the Rietveld refinement method. Therefore, a series of the mechanochemically synthesized samples with different concentrations of lanthanum were annealed at 1000 °C for 5 h. It was found that the annealed powders are microcrystalline La-substituted apatites Ca{sub 10−x}La{sub x}(PO{sub 4}){sub 6}O{sub x}(OH){sub 2−x}, where 0 ≤ x ≤2. In their structure, the Ca{sup 2+} ions are replaced by the La{sup 3+} ions localized near the Ca2 sites, and the OH{sup -} groups are replaced by the O{sup 2-} ions in the hexagonal channels. - Highlights: • a new approach to the synthesis of La-substituted apatites is proposed. • dry mechanochemical method allows reducing the synthesis time down to 30 min. • the product of synthesis is single-phase with an average crystallite size of 20 nm. • the parameters and volume of the unit cell increase with dopant concentration. • La-substituted apatites are Ca{sub 10−x}La{sub x}(PO{sub 4}){sub 6}O{sub x}(OH){sub 2−x}, where 0 ≤ x ≤ 2.},
doi = {10.1016/J.JSSC.2017.05.008},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = ,
volume = 252,
place = {United States},
year = {2017},
month = {8}
}