摘要
采用高温固相反应法制备了Sc_(2)O_(3)-CeO_(2)掺杂ZrO_(2)陶瓷材料,通过X射线衍射仪(XRD)、场发射扫描电镜(SEM)、高温热膨胀仪及激光热导仪探究稀土掺杂对陶瓷材料的物相结构、微观形貌和热物理性能的影响。结果表明:Sc_(2)O_(3)-CeO_(2)掺杂ZrO_(2)陶瓷材料经1 500℃烧结6 h后无单斜相产生,物相结构表现为单一立方相结构,显微结构致密。Sc_(2)O_(3)和CeO_(2)的掺杂提高了ZrO_(2)基陶瓷材料的热膨胀系数,室温至1 300℃,10C6SSZ的平均热膨胀系数为1.190×10^(-5)K^(-1)。室温至1 000℃,CeO_(2)和Sc_(2)O_(3)的掺杂有效地降低了ZrO_(2)基陶瓷材料的热导率,10C6SSZ的热导率为1.73~1.93 W·m^(-1)·K^(-1)。
Sc_(2)O_(3)-CeO_(2)doped ZrO_(2)ceramic materials were prepared by high-temperature solid-state reaction method.X-ray diffraction (XRD),field emission scanning electron microscope (SEM),high temperature thermal expansion instrument and laser thermal conductivity instrument were used to explore the effects of rare earth doping on the phase structure,microstructure and thermophysical properties of ceramic materials.The result showed that,Sc_(2)O_(3)-CeO_(2)doped ZrO_(2)ceramic material did not produce monoclinic phase after sintering at 1 500℃for 6 h,and the phase structure showed a single cubic phase structure with dense microstructure.The doping of Sc_(2)O_(3)and CeO_(2)increased the thermal expansion coefficient of ZrO_(2)-based ceramic materials.The average thermal expansion coefficient of 10C6SSZ was 1.190×10^(-5)K^(-1)from room temperature to 1 300℃.From room temperature to1 000℃,the doping of CeO_(2)and Sc_(2)O_(3)effectively reduced the thermal conductivity of ZrO_(2)-based ceramic materials,and the thermal conductivity of 10C6SSZ was 1.73~1.93 W·m^(-1)·K^(-1).
作者
喻辉
YU Hui(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Inner Mongolia Baotou 014000,China)
出处
《辽宁化工》
CAS
2023年第2期161-165,共5页
Liaoning Chemical Industry
基金
国家自然科学基金项目,稀土A、B位复合掺杂对锆酸镧热障涂层结构和热物理性能的协同影响规律及机理(项目编号:51762036)。
关键词
热障涂层陶瓷材料
ZrO_(2)基
物相结构
热物理性能
Thermal barrier coating ceramic materials
ZrO_(2)-based
Phase structure
Thermophysical properties
