Dissolution mechanisms of β-tricalcium phosphate doped with monovalent metal ions
Dissolution mechanisms of β-tricalcium phosphate doped with monovalent metal ions
复制标题
一价金属离子掺杂β-磷酸三钙的溶解机理
DOI：
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Y. Toda
中科院分区：
文献类型：
--
作者：
N. Matsumoto;Katsumi Yoshida;K. Hashimoto;Y. Toda
通过在β-磷酸三钙（β-TCP）中掺入金属离子，研究了一价金属离子（Li+、Na+、K+）对β-TCP中Ca位的取代对β-TCP溶解度的影响，并根据溶解实验结果和晶体结构的观察，推测了β-TCP的溶解机理。掺杂Li+、Na+和K+离子的β-TCP粉末（Li-TCP、Na-TCP和K-TCP）具有比纯β-TCP粉末低的溶解度，并且溶解度随着金属离子的量的增加而降低。这种溶解度的降低可以归因于在β-TCP中的Ca（4）位点和空位处的单价金属离子的取代后晶体结构稳定性的改善，以及在β-TCP结构中的所有Ca位点处的Ca 2+和金属离子的最终占据。然而，Li-TCP的溶解行为不同于Na-TCP和K-TCP，因为Li（4）位与氧之间的原子排列不如Na（4）或K（4）位与氧之间的原子排列稳定。此外，由于二价金属离子掺杂的β-TCP的结构稳定性高于一价金属离子掺杂的β-TCP，因此二价金属离子掺杂的β-TCP的溶解度低于一价金属离子掺杂的β-TCP。结果表明，金属离子掺杂后β-TCP的晶体结构稳定性和原子排列方式对β-TCP的溶解性和溶解机理有显著影响。
The effects on solubility of the substitution of monovalent metal ions (Li+, Na+, and K+ ions) at the Ca sites in β-tricalcium phosphate (β-TCP) were investigated by immersion of β-TCP powder doped with metal ions in saline, and the dissolution mechanisms of these samples were inferred from the results of dissolution tests and from observations of the crystal structures. β-TCP powder doped with Li+, Na+, and K+ ions (Li-TCP, Na-TCP, and K-TCP) had a lower solubility than pure β-TCP powder, and the solubility decreased with an increase in the amount of metal ions. This decrease in solubility can be attributed to an improvement in crystal structure stabilization upon the substitution of monovalent metal ions at the Ca(4) sites and vacancies in β-TCP, and the resultant occupancy of Ca2+ and metal ions at all Ca sites in the β-TCP structure. However, the dissolution behavior of Li-TCP differed from that of Na-TCP and K-TCP because the atomic arrangement between the Li(4) sites and oxygen was less stable than that between the Na(4) or K(4) sites and oxygen. In addition, the solubility of β-TCP doped with divalent metal ions was lower than that of β-TCP doped with monovalent metal ions because the structural stability of β-TCP doped with divalent metal ions was higher than that of β-TCP doped with monovalent metal ions. These results show that the solubility and dissolution mechanisms of β-TCP doped with metal ions were significantly influenced by the crystal structure stabilization and atomic arrangement of doped β-TCP.
影响因子：
9.7
作者：
Li, Xia;Ito, Atsuo;Sogo, Yu;Wang, Xiupeng;LeGeros, R. Z.
通讯作者：
LeGeros, R. Z.
影响因子：
4.3
作者：
NERY, EB;LEGEROS, RZ;LEE, K
通讯作者：
LEE, K