Features of the Kinetics of Sintering of Hydroxyapatite Powders with Various Particle Sizes
- 作者: Petrakova N.1, Bakunov V.2, Barinov S.1, Titov D.1
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隶属关系:
- Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
- Joint Institute for High Temperatures, Russian Academy of Sciences
- 期: 卷 483, 编号 2 (2018)
- 页面: 308-311
- 栏目: Chemical Technology
- URL: https://journals.rcsi.science/0012-5008/article/view/154329
- DOI: https://doi.org/10.1134/S0012500818120029
- ID: 154329
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详细
The kinetics of sintering of nanosized (20 nm) and microsized (0.7–0.9 μm) hydroxyapatite (HA) powders with continuously increasing temperature at a constant rate was studied by dilatometry. The sintering of the HA micropowders within the temperature range 1100–1300°C occurred by the mechanism of diffusion-viscous flow of crystalline particles. The kinetics of the process was described by a power-law function of time; i.e., the process rate depended on current shrinkage. The shrinkage of the nanopowders within the sintering temperature range was directly proportional to temperature, occurred by the law of viscous flow of amorphous particles, and was independent of the temperature increase rate. The apparent sintering activation energies of the studied micro- and nanopowders were 180 and 60 kJ/mol, respectively.
作者简介
N. Petrakova
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
编辑信件的主要联系方式.
Email: petrakova.nv@mail.ru
俄罗斯联邦, Moscow, 119991
V. Bakunov
Joint Institute for High Temperatures, Russian Academyof Sciences
Email: petrakova.nv@mail.ru
俄罗斯联邦, Moscow, 125412
S. Barinov
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
Email: petrakova.nv@mail.ru
俄罗斯联邦, Moscow, 119991
D. Titov
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences
Email: petrakova.nv@mail.ru
俄罗斯联邦, Moscow, 119991