氧化镧添加对氧化铝微晶陶瓷结构与性能的影响  

Effect of Lanthanum Oxide Addition on Structure and Properties of Alumina Microcrystalline Ceramics

作　　者：杨小晗 孙文岳 曾义 尹可鑫 易梦环 陈常连[1] YANG Xiao-han;SUN Wen-yue;ZENG Yi;YIN Ke-xin;YI Meng-huan;CHEN Chang-lian(School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学材料材料科学与工程学院,武汉430205

出　　处：《建材世界》2024年第2期1-6,共6页The World of Building Materials

摘　　要：以La_(2)O_(3)为烧结助剂,常压烧结制备了系列的Al_(2)O_(3)微晶陶瓷,重点研究La_(2)O_(3)添加对Al_(2)O_(3)陶瓷结构和力学性能的影响。样品晶粒平均粒径均在3~4μm之间,且样品的致密度、抗弯强度及断裂韧性均有较为明显的提升;其中烧结温度1700℃、La_(2)O_(3)添加质量分数为1.8%时韧性最高。La_(2)O_(3)在陶瓷基体中分布均匀,样品物相以Al_(2)O_(3)为主,当La_(2)O_(3)添加质量分数高于0.9%时,样品中存在少量的La_(1.4)Al_(22.6)O_(36)物相。A series of Al_(2)O_(3)microcrystalline ceramics were prepared by atmospheric sintering using La_(2)O_(3)as sintering aid,focusing on the effect of La_(2)O_(3)addition on the structure and mechanical properties of Al_(2)O_(3)ceramics.The average grain size of the samples was between 3~4μm,and the density,flexural strength and fracture toughness of the samples were significantly improved.Among them,the toughness was highest when the sintering temperature was 1700℃and the mass fraction of La_(2)O_(3)was 1.8%.La_(2)O_(3)was evenly distributed in the ceramic matrix,and the sample phase was mainly Al_(2)O_(3),and when the mass fraction of La_(2)O_(3)was higher than 0.9%,a small amount of La_(1.4)Al_(22.6)O_(36)phase existed in the sample.

关 键 词：氧化铝陶瓷 氧化镧 力学性能 微晶陶瓷 

分 类 号：TQ171.733[化学工程—玻璃工业]