摘要
为了提高铝酸镧基高发射率涂层的抗烧结性,以纯度(w)均为99%的La_(2)O_(3)、Al_(2)O_(3)、CaCO_(3)、Fe_(2)O_(3)为原料,外加(加入质量分数分别为0、5%、10%和15%)Y_(2)O_(3)稳定电熔ZrO_(2),球磨、预烧、压制成型后利用固相烧结法经1600℃保温2 h制备出Ca^(2+)-Fe^(3+)掺杂的LaAlO_(3)/ZrO_(2)试样,研究了ZrO_(2)加入量对其性能的影响。结果表明:添加剂ZrO_(2)不与LaAlO_(3)发生反应,能够抑制试样的烧结。且随着ZrO_(2)加入量的增多,试样的线收缩率和热导率明显下降,同时发射率也有所下降,但均大于0.9。ZrO_(2)的最佳加入量为LaAlO_(3)辐射剂粉料质量的10%。
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 La2O_(3),Al2O_(3),CaCO_(3),and Fe2O_(3)(that all have the purity of 99 mass%)as raw materials,extra-adding fused yttria-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 higher than 0.9.The optimal addition of ZrO_(2)is 10%.
作者
张一帆
王曲
王刚
卢珂珂
张琪
Zhang Yifan;Wang Qu;Wang Gang;Lu Keke;Zhang Qi(State Key Laboratory of Advanced Refractories,Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,Henan,China;不详)
出处
《耐火材料》
CAS
北大核心
2023年第1期6-9,共4页
Refractories
基金
国家重点研发计划(No.2021YFB3701400)
NSFC-河南联合基金资助项目(U1904217)
中原科技创新领军人才(224200510006)
洛阳市重大科技专项(No.2101008A)。
关键词
铝酸镧
氧化锆
抗烧结性
发射率
lanthanum aluminate
zirconia
sintering resistance
emissivity
