SiO2含量对YSZ陶瓷在高温时效中烧结性的影响  

Effect of SiO2 Content on Sintering Characteristics of YSZ in High Temperature Aging

作　　者：王子媛 赵蒙[1] 杨军[1] 李宗原 汪敏 潘伟[1] Wang Ziyuan;Zhao Meng;Yang Jun;Li Zongyuan;Wang Min;Pan Wei(State Key Laboratory of New Ceramics and Fine Processing,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《稀有金属材料与工程》2020年第2期688-694,共7页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51323001)。

摘　　要：研究了SiO2含量对YSZ陶瓷在不同温度下时效后的烧结速率影响,同时研究了其对YSZ时效过程中的结构形貌和性能变化的影响。实验中以正硅酸乙酯(TEOS)为硅源,制备了SiO2含量不同且有约10%气孔的YSZ陶瓷块体,并在不同温度下热处理180 h。通过扫描电镜(SEM)表征了样品的微观形貌,并使用阿基米德法测试得到样品气孔率,同时表征了样品高温时效后的相组成、力学及热学性能的变化。通过交流阻抗谱法初步判断了SiO2在YSZ陶瓷晶界上的分布。研究发现,0.3%(质量分数,下同)SiO2的引入将会使YSZ晶粒尺寸变大且气孔率显著降低,同时其硬度、杨氏模量及热导率的变化率明显较未添加SiO2的要快。The effects of SiO2 content on the sintering rate as well as the morphology and properties of YSZ during aging at different temperatures were studied.In this work,YSZ samples with 10% porosity and different SiO2 contents were prepared.The sample microstructures were characterized by scanning electron microscopy(SEM).The sample porosity was obtained by the Archimedes method.The phase composition,mechanical and thermal properties of samples after aging were measured.It is found that the introduction of 0.3 wt% SiO2 will increase the YSZ grain size and decrease the porosity significantly.The changing rates of hardness,Young’s modulus and thermal conductivity of samples are faster than those of the undoped YSZ due to the introduction of SiO2.

关 键 词：SIO2 YSZ 烧结 力学性能 

分 类 号：TQ174.75811[化学工程—陶瓷工业]