Biocompatible hydroxyapatite (HA), with chemical formula Ca₅(PO₄)₃(OH), is widely used in dentistry and orthopedics. Inorganic additions of metal ions into HA structure can significantly influence physicochemical properties of HA-based ceramics. Calcium manganese phosphate (Ca₁₉Mn₂(PO₄)₁₄) was successfully synthesized by mechanochemical method where the manganese was added to HA with 5, 10, 15, and 20 wt%. The mechanochemical process was investigated by using Fourier-transform infrared spectrometer (FT-IR), X-ray diffraction (XRD), and differential thermal analysis (DTA). The compacted circular disc samples heat-treated at 1200 °C were also investigated using field emission scanning electron microscopy (FE-SEM) where fine agglomerates with small grain size were found. Sample densification improved with increasing sintering temperature. Calcium manganese phosphate (Ca₁₉Mn₂(PO₄)₁₄), beta-tricalcium phosphate (β-Ca₃(PO₄)₂), and manganese oxide (Mn₂O₃) phases were formed and increases with increasing sintering temperature. The electrochemical behaviors and corrosion rate were investigated by potentiodynamic polarization, which confirms low corrosion rate that calculated by weight loss test of HA/Mn sample in Hank’s solution. With increasing Mn content, Vicker’s hardness and contact angle of the 1200-°C sintered materials decrease.

中文翻译：

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机械合成锰与羟基磷灰石制备磷酸锰钙。

具有化学式Ca ₅（PO ₄）₃（OH）的生物相容性羟基磷灰石（HA）被广泛用于牙科和骨科。向HA结构中无机离子的无机添加会显着影响HA基陶瓷的物理化学性质。磷酸锰钙（Ca ₁₉ Mn ₂（PO ₄）₁₄通过机械化学方法成功地合成了），其中将锰以5、10、15和20wt％添加到HA中。通过使用傅立叶变换红外光谱仪（FT-IR），X射线衍射（XRD）和差热分析（​​DTA）研究了机械化学过程。还使用场发射扫描电子显微镜（FE-SEM）研究了在1200°C热处理的压实圆盘样品，其中发现了细小颗粒的细团聚物。随着烧结温度的提高，样品的致密化得到改善。钙磷酸锰（CA ₁₉的Mn ₂（PO ₄）₁₄），β-磷酸三钙（β-的Ca ₃（PO ₄）₂），形成氧化锰（Mn ₂ O ₃）相，并随烧结温度的升高而增加。通过电位动力学极化研究了电化学行为和腐蚀速率，证实了通过在汉克溶液中进行HA / Mn样品的失重测试所计算出的低腐蚀速率。随着Mn含量的增加，维氏硬度和1200℃烧结材料的接触角降低。