Surface-layer modification of hydroxyapatite ceramic with acid and heat treatments.
Surface-layer modification of hydroxyapatite ceramic with acid and heat treatments.
复制标题
酸热处理羟基磷灰石陶瓷的表层改性。
DOI：
10.4012/dmj.21.170
复制
发表时间：
2002
影响因子：
2.5
通讯作者：
K. Asaoka
中科院分区：
文献类型：
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作者：
M. Kon;L. Hirakata;Y. Miyamoto;F. Kawano;K. Asaoka
The purpose of this study was to examine or characterize the surface layer of a calcium phosphate ceramic with a gradual compositional change from alpha-tricalcium phosphate (alpha-TCP) on the surface to hydroxyapatite (HAP) on the inside. The surface of a dense HAP ceramic was acid-treated for 1 hour with orthophosphoric acid (H3PO4) solutions of several concentrations (0.5, 1.0 and 5.0 mol/L) or a buffered solution (pH 4.0) consisting of phosphate solutions. After acid treatment, specimens were heat-treated at 1,250 degrees C for 1 hour. X-ray photoelectron spectroscopy revealed that the compositional gradient layer could be modified on the surface of the HAP ceramic with all acid and heat treatments, and that 5.0 mol/L H3PO4 solution and heat treatments had a maximal thickness of approximately 2 microm for the surface-modified layer. It was confirmed that the outermost layer of HAP ceramics modified with the treatments, except 5.0 mol/L H3PO4 solution, showed a compound such alpha-TCP.
T. Kokubo：“仿生工艺制备的磷灰石-聚合物复合材料：通过辉光放电处理提高磷灰石与聚合物的粘附力”生物陶瓷。
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