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ID:39677218
大小:1.16 MB
页数:4页
时间:2019-07-09
《烧结方式对氧化锆陶瓷老化性能的影响》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、·766·实用口腔医学杂志(JPractStomato1)2015Nov,31(6)烧结方式对氧化锆陶瓷老化性能的影响苏晓晖吴丽艳黎松龄王磊【摘要】目的:评价微波烧结和常规烧结牙科氧化锆的加速老化性能。方法:制作cercon氧化锆圆片48片并随机均分成2组,对照组(C组)采用常规烧结,实验组(M组)采用微波烧结,将C组和M组各分成2组,CA组、MA组试件在室温下干燥存放,cB组、MB组试件134℃、0.2MPa压力加速老化处理5h。X射线衍射(XRD)分析观察氧化锆单斜晶相(m相)含量的改变、测试双轴弯曲强度,SEM观察试件断裂面微观形貌。结果:CB和MB组氧化锆m
2、相含量高于CA和MA组(P<0.05);SEM结果显示微波二次烧结氧化锆晶粒均匀细小,2种方法烧结的氧化锆试件在加速老化前后断裂面微观结构显示晶粒没有明显增大,未发现裂纹;4组氧化锆双轴弯曲强度差别无统计学意义(P>0.05)。结论:微波烧结氧化锆加速老化后性能与常规烧结氧化锆材料相当。【关键词】微波;二次烧结;牙科纳米氧化锆;加速老化AngperformanceofdentalzirconiasinteredbydiferencemethodSUXiaohui,Liyan,LISongling,WANGLei.1.530021Nanning,Departmento
3、fCollegeofStomatology,GuangxiMedicalUniversity,China;2.GuangxiLiuzhousHospital【Abstract】Objective:Toobservetheeffectsofagingperformanceontheprope~yofdentalzirconiasinteredbymicrowavefurnaceandconvention~furnace.Methods:48zirconiawaferspecimenswerefabricatedandrandomlydividedequallyinto
4、2groups.Thesamplesweresinteredinamicrowavefurnace(Mgroup)andaconventionalfurnace(Cgroup)respectively.Thesamplesfromthe2groupsweredividedinto2sub—groupsandtreatedbyroomtemperatureanddrycondition(Agroup)and134℃with0.2MPapres—stlre(Bgroup,acceleratedaging)respectively.Themphasefractionoft
5、hesampleswasdeterminedbyX—raydiffractionanalysis.Thebiaxialflexuralstrengthwasexaminedbyuniversaltestingmachine.ThefracturecrosssectionwasobservedbySEM.Results:CBandMBgroupsshowedhighermphasefractionthanCAandMAgroups(P<0.05).Thegrainsizeofzireoniasinteredbymicrowavemethodwasuniform.The
6、fracturesurfaceofzirconiashowednoobviouscrackandnograinsizechangeafteracceleratedaging.Thebiaxialflexuralstrengthofthesamplesshowednosignificantdifferenceamonggroups(P>0.05).Conclusion:Theagingperform—anceofzirciniasinteredbymicrowavemethodweresimilartothatsinteredbyconventionalmethod.
7、【Keywords】Microwave;Second—timesintering;Nano—meterzirconia;Acceleratedaging中图分类号:R783.1文献标志码:Adoi:10.3969/j.issn.1001—3733.2015.06.006微波烧结是利用微波具有的特殊波段与材料的基氧化锆远期成功率的重要因素。Chevalier_3发现氧化本细微结构耦合而产生热量,材料在电磁场中的介质锆在134℃的高温灭菌器中放置1h的老化程度相当损耗使其材料整体加热至烧结温度,实现致密化的方于植入人体中使用3~4年,而口腔中的循环载荷和热法。黎松龄
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