羟基磷灰石(Hydroxyapatite, HAP)是广泛应用于临床骨缺损修复的支架材料, 但传统方法不易使其成型形状复杂的个人定制化人工骨植入物, 因此, 有必要将3D打印技术应用于HAP陶瓷成型。以HAP粉末和光敏树脂为原料, 通过粘度测试, 制备HAP质量比为30%的混合物, 用于光固化面曝光3D打印技术成型陶瓷坯体。根据热重(Thermogravimetric, TG)和差热(Differential Scanning Calorimetry, DSC)分析结果, 发现光敏树脂分解的主要温度区间为300 ℃至500 ℃, 由此确定坯体的烧结工艺参数, 包括烧结的温度范围和升温速度, 烧制得到的成型件, 体积收缩约为65.2%, 通过X射线衍射(X-ray diffraction, XRD)分析其物相组成。实验结果证明, 利用光固化面曝光3D打印技术能够成型陶瓷坯体, 通过适当的高温处理, 可去除原料中的光敏树脂, 得到陶瓷制件。

Hydroxyapatite(HAP)is a scaffold material that is widely used in clinical bone defect repair. However, it is not easy to form the complex shape with the traditional method in individual customization of artificial bone implants. Therefore, it is necessary to apply 3D printing technology to HAP ceramic molding. Using HAP powder and photosensitive resin as raw materials, through the viscosity test, a mixture of 30 wt% HAP was prepared for photocureable surface exposure 3D printing technology molding ceramic body. According to the results of thermogravimetric(TG) and differential scanning calorimetry(DSC), the main decomposition temperature range of photosensitive resin was found between 300 ℃ to 500 ℃. Thus, the sintering process parameters including the sintering temperature range and the heating rate were determined. The shrinkage volume of molded part was about 65.2%. Furthermore, the phase composition was analyzed by X-ray diffraction(XRD). The experimental results show that the photocureable surface exposure 3D printing technology can be used to shape the ceramic body, through the appropriate high temperature treatment, the photosensitive resin in the raw materials can be removed, obtain ceramic parts.