Electrical Polarization of β‐Tricalcium Phosphate Ceramics
Electrical Polarization of β‐Tricalcium Phosphate Ceramics
复制标题
β-磷酸三钙陶瓷的电极化
DOI：
10.1111/j.1551-2916.2010.03710.x
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发表时间：
2010
影响因子：
3.9
通讯作者：
K. Yamashita
中科院分区：
文献类型：
--
作者：
Wei Wang;S. Itoh;Naoki Yamamoto;A. Okawa;A. Nagai;K. Yamashita
制备了β-磷酸三钙（β-TCP）烧结颗粒和粉末，研究了β-TCP的电极化储电能力。用X射线衍射仪和傅里叶变换红外光谱仪对β-TCP进行了表征。计算了β-TCP离子迁移所需的交流阻抗、电导率和活化能。对合成的β-TCP进行电极化后，测量其热刺激去极化电流，计算样品中的总储存电荷。合成的β-TCP颗粒和粉末中用于电极化弛豫的活化能接近β-TCP颗粒中离子迁移所需的活化能。结果表明，β-TCP具有适合离子传导的组成和结构，在颗粒和粉末中均储存了大量的电荷。在β-TCP中，假设不含质子的其他电荷载体，如Ca 2+或O2−，而不是羟基磷灰石中的质子传输极化。
The β-tricalcium phosphate (β-TCP)-sintered pellets and powders were prepared and the ability of β-TCP to store an electrical charge by electrical polarization was studied. The prepared β-TCP was characterized by X-ray diffractometry and Fourier transform infrared spectroscopy. Alternating-current impedance conductivity and the energy of activation required for the ionic migration of β-TCP were calculated. After electrical polarization of synthesized β-TCP, the thermally stimulated depolarization current was measured, and the total stored charges in the samples were calculated. The energy of activation for the relaxation of electrical polarization in the synthesized β-TCP pellets and powders approximated the energy of activation required for ionic migration in the β-TCP pellets. It was confirmed that β-TCP has a suitable composition and structure for ion conduction and a large electrical charge is stored in both the β-TCP pellets and powders. Instead of proton transport polarization in hydroxyapatite, other charge carrier, such as Ca2+ or O2−, is assumed in β-TCP, in which proton is not contained.