用微波烧结法制备出多孔$\beta$--TCP/HA双相生物陶瓷, 研究了烧结温度、 烧结时间及加热速度对生物陶瓷性能的影响. 优化烧结工艺后, 得到了平均晶粒尺寸约400 nm, 气孔率约48\%, 强度为 1.10 MPa的多孔$\beta$--TCP/HA双相陶瓷. 用微波烧结方法可以制备出良好的多孔$\beta$--TCP/HA双相生物陶瓷, 其线收缩率和抗压强度随着烧结温度的升高和烧结时间的延长而增大. 与常规马弗炉烧结相比, 在多孔$\beta$--TCP/HA双相生物陶瓷的线收缩率和抗压强度相同的情况下, 微波烧结温度降低了大约100℃, 提高了烧结效率, 降低了能耗. 微波烧结钙磷生物陶瓷具有更好的生物活性.
Porous $\beta$--TCP/HA biphasic bioceramics were sintered by a microwave processing system to improve both the mechanical strength and the bioactivity. Through the optimization of sintering conditions, such as the sintering temperature, the holding time and the heating speed, porous bioceramics with average crystal size of 400 nm, porosity of 48\%, and tensile strength of 1.10 MPa were prepared. To achieve similar linear shrinkage and tensile strength, the microwave sintering temperature reduced about 100℃. The comparison between conventional sintered specimens and microwave sintered specimens showed that the latter exhibit smaller grain size and higher tensile strength. After immersion in simulated body fluid, the amount of bone--like apatite formed on the specimens sintered by microwave processing system was more than that of specimens sintered by conventional furnace. The results indicate that it is possible to improve both the mechanical strength and bioactivity of Ca--P bioceramics by microwave sintering.
参考文献
| [1] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%