耐火材料 ›› 2023, Vol. 57 ›› Issue (1): 6-9.DOI: 10.3969/j.issn.1001-1935.2023.01.002

• 研究开发 • 上一篇    下一篇

ZrO2加入量对铝酸镧基高发射率涂层材料的影响

张一帆1), 王曲1), 王刚1), 卢珂珂2), 张琪1)   

  1. 1)中钢集团洛阳耐火材料研究院有限公司 先进耐火材料国家重点实验室 河南洛阳 471039
    2)郑州大学 材料科学与工程学院 河南郑州 450001
  • 收稿日期:2022-04-20 出版日期:2023-02-15 发布日期:2023-02-21
  • 作者简介:张一帆:女,1994年生,硕士研究生。E-mail:lirrzyf@126.com
  • 基金资助:
    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)。

Effect of ZrO2 addition on lanthanum aluminate based high emissivity coating materials

Zhang Yifan, Wang Qu, Wang Gang, Lu Keke, Zhang Qi   

  1. State Key Laboratory of Advanced Refractories,Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,Henan,China
  • Received:2022-04-20 Online:2023-02-15 Published:2023-02-21

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La2O3、Al2O3、CaCO3、Fe2O3为原料,外加(加入质量分数分别为0、5%、10%和15%)Y2O3稳定电熔ZrO2,球磨、预烧、压制成型后利用固相烧结法经 1 600 ℃保温2 h制备出Ca2+-Fe3+掺杂的LaAlO3/ZrO2试样,研究了ZrO2加入量对其性能的影响。结果表明:添加剂ZrO2不与LaAlO3发生反应,能够抑制试样的烧结。且随着ZrO2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。ZrO2的最佳加入量为LaAlO3辐射剂粉料质量的10%。

关键词: 铝酸镧, 氧化锆, 抗烧结性, 发射率

Abstract: In order to enhance the sintering resistance of lanthanum aluminate based high emissivity coatings,Ca2+-Fe3+ doped LaAlO3/ZrO2 specimens were prepared by solid state sintering using La2O3,Al2O3,CaCO3,and Fe2O3 (that all have the purity of 99 mass%) as raw materials,extra-adding fused yttria-stabilized ZrO2 (0,5%,10%,and 15%,by mass),ball milling,pre-calcining,pressing into shapes and sintering at 1 600 ℃ for 2 h.The effect of the ZrO2 addition on the properties of lanthanum aluminate based high emissivity coatings was explored.It is concluded that ZrO2 does not react with LaAlO3,which can inhibit the sintering of the specimens.With the increase of the ZrO2 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 ZrO2 is 10%.

Key words: lanthanum aluminate, zirconia, sintering resistance, emissivity

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