常温常压下磷酸钙的化学沉积研究

摘要：生物陶瓷类材料与骨组织的成分十分相近，生物相容性优越，相比于其他材料有着天然的优势，因此生物陶瓷类材料在医学领域中扮演着越来越重要的角色。现阶段在金属表面制备的生物陶瓷涂层的成熟工艺种类有限，而且步骤繁琐，成本高。为改进这一问题，本实验研究者通过改进沉积方法，在不同条件下生成Ca-P涂层，探究最合适的涂层生成工艺，并经过热处理工艺，将Ca-P涂层进一步转化，制备β-TCP。

使用扫描电镜、X-射线衍射仪、接触角测量仪进行表征，探究最合适的工艺流程。实验发现，单独采用用CPS1浸泡时，所生成的涂层极其不稳定，很容易发生转变，之后使用CPS1-CPS2混合溶液处理的试样上可以得到叶片状的涂层，相比于单独使用CPS1，第二类方法更加利于接下热处理制备β-TCP。在不同热处理温度下下，900℃下形成的β-TCP的结晶度明显高于800℃或者700℃下所形成的。本课题结果表明：以碱热处理的钛试样为基体，可采用常温化学沉积法制备Ca-P涂层，其中在CPS1处理1h，之后再经CPS2处理12h得到的Ca-P涂层更加密集，质量最优。之后进行的热处理，900℃下的处理1h，随炉冷却，可得到结晶度最高、涂层质量最好的β-TCP涂层。

关键词：钛；生物材料；磷酸钙；化学沉积

Abstract：Biological ceramic materials and bone tissue are very similar in chemical components, show excellent biocompatibility and therefore have a natural advantage in medical applications compared to other materials. And nowadays, they are playing more and more important roles. At the present stage, the available mature technologis of bioceramic coating preparation on metal surface are limited, and the steps are usually complicated and are high costing. In order to improve the current status, this study carried out modified deposition method to generate Ca-P coating and then after heat

treatment, Ca-p coating was further transformed to β-TCP.

Scanning electron microscope, X-ray diffractometer and contact angle measuring instrument were used to optimize the best technological process. The experiment found that solely soaking in CPS1 generated a coating extremely unstable, easily to be changed; whereas, after conduct chemical deposition in CPS1-CPS2 mixed solution, a coatign with blade shaped microstructures could be obtained. Compared to the use of CPS1 alone, the second kind methods is more feasible for the consequent heat treatment ofβ-TCP preparation. At different heat treatment temperatures, the crystallinity of β-TCP formed at 900 DEG C is higher than that under 800 or 700 DEG C. The results showed that on the titanium substrate pretreated by alkali heat treatment a Ca-P coating can be prepared at room temperature by chemical deposition method.The treatment of 1H in CPS1, and then treated with CPS2 Ca-P coated 12h could lead to a dense coating with best quality.After the heat treatment of 1H at 900 DEG C, with the furnace cooling, β-TCP coating with highest crystallinity and best coating quality could be gotten.

Keywords: titanium; biological materials; calcium phosphate; chemical deposition

第一章绪论 1

1.1 生物材料 1

1.2 医用生物陶瓷 2

1.2.1 医用生物陶瓷性能 2

1.2.2 医用生物陶瓷的简史 2

1.2.3 常温常压下磷酸钙的化学沉积研究:http://www.youerw.com/huaxue/lunwen_204689.html