摘要
目的:研究微波二次烧结工艺对牙科纳米氧化锆陶瓷材料的烧结密度,维氏硬度以及显微结构的影响,探索微波二次烧结牙科纳米氧化锆的烧结工艺。方法:将制作的30片氧化锆圆片试件随机分为实验组和对照组,每组15片。对照组按厂家推荐烧结程序进行常规二次烧结,实验组采用微波二次烧结。烧结后每组试件内6片用于测量氧化锆的烧结密度,6片用于测量氧化锆的维氏硬度,3片用于氧化锆的电镜扫描,实验组和对照组测试结果分别进行对比。结果:微波二次烧结的牙科纳米氧化锆材料的密度,维氏硬度均高于常规二次烧结的氧化锆,结果具有统计学意义(P<0.05),扫描电镜(SEM)下观察到微波二次烧结的牙科纳米氧化锆材料晶粒排列更紧密,晶体颗粒更小。结论:微波二次烧结工艺能够应用于牙科氧化锆陶瓷的二次烧结,缩短了牙科氧化锆陶瓷烧结时间,优化了牙科纳米氧化锆陶瓷材料的部分机械性能。
Objective： To study the influence of microwave twice sintering method on the sintering property, Vickers hardness and microstucture of nano-meter zirconia ceramic for dental use. Method： 30 samples were randomly divided equally into two groups. Group one was sintered by manufacturers recommend conventional second-time sintering process. Group two was sintered by microwave second-time sintering process. After sintering, six samples from each group were used for measuring sintered density. The other six samples were used for measuring the Vickers hardness. And the rest three samples from each group were scanned by scanning electron microscopy. Result： The sintered density and Vickers hardness of the microwave sintered dental nano-zirconia were superior to the conventional group. There were significant differences （P 〈0.05）. The crystal granules of microwave second-time sintered nano-zirconia were closely spaced, and they are smaller than the conventional sintered group. Conclusion： Part of the mechanical properties of nano-zircinia sintered by microwave second-time sintered were superior to the conventional sintered. The results suggest that microwave second-time sintering process could be applied to the secone-time sintering of dental nano-zirconia to shorten sintering time.
出处
《临床口腔医学杂志》
2013年第3期140-143,共4页
Journal of Clinical Stomatology
基金
广西教育厅科研资助项目(201012MS047)
关键词
微波
二次烧结
牙科纳米氧化锆
microwave
second-time sintering
nano-meter zirconia
