Effect of ZrO_(2)Addition on Lanthanum Aluminate-based High Emissivity Coating Materials  

作　　者：ZHANG Yifan WANG Gang WANG Qu LU Keke ZHANG Qi 

机构地区：[1]State Key Laboratory of Advanced Refractories,Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,China [2]College of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China

出　　处：《China's Refractories》2023年第4期38-41,共4页中国耐火材料（英文版）

基　　金：Zhongyuan Science and Technology Innovation Leading Talents(224200510006);NSFC-Henan Joint Fund funded project(U1904217).

摘　　要：In order to enhance the sintering resistance of lanthanum aluminate based high emissivity coatings,Ca^(2+)-Fe^(3+)doped LaAlO_(3)/ZrO_(2)specimens were prepared by solid state sintering using La_(2)O_(3),Al_(2)O_(3),CaCO_(3) and Fe_(2)O_(3) as raw materials,extra-adding fused Y_(2)O_(3)-stabilized ZrO_(2)(0,5%,10%,and 15%,by mass),ball milling,pre-calcining,pressing into shapes and sintering at 1600℃for 2 h.The effect of the ZrO_(2)addition on the properties of lanthanum aluminate based high emissivity coatings was explored.It is concluded that ZrO_(2)does not react with LaAlO_(3),which can inhibit the sintering of the specimens.With the increase of the ZrO_(2),addition,the linear shrinkage rate and the thermal conductivity decrease significantly,while the emissivity decreases,but the emissivity of all the specimens is all higher than 0.9.The optimal addition of ZrO_(2),is 10%.

关 键 词：lanthanum aluminate ZIRCONIA sintering resistance EMISSIVITY 

分 类 号：TQ174.7[化学工程—陶瓷工业]