Effect of ZrO2 Addition on Lanthanum Aluminate-based High Emissivity Coating Materials

doi:10.19691/j.cnki.1004-4493.2023.04.007

China's Refractories ›› 2023, Vol. 32 ›› Issue (4): 38-41.DOI: 10.19691/j.cnki.1004-4493.2023.04.007

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Effect of ZrO₂ Addition on Lanthanum Aluminate-based High Emissivity Coating Materials

ZHANG Yifan¹, WANG Gang^1,*, WANG Qu¹, LU Keke², ZHANG Qi¹

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

Online:2023-12-15 Published:2023-12-21
Contact: *e-mail: wangg@lirrc.com
About author:Zhang Yifan, born in 1994, obtained her master’s degree from Sinosteel Luoyang Institute of Refractories Research Co., Ltd. in 2022, majoring in materials science and engineering. Her research interest covers LaAlO3 based high emissivity coatings.

Abstract

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 as raw materials, extra-adding fused Y₂O₃-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 all higher than 0.9. The optimal addition of ZrO₂ is 10%.

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

ZHANG Yifan, WANG Gang, WANG Qu, LU Keke, ZHANG Qi. Effect of ZrO₂ Addition on Lanthanum Aluminate-based High Emissivity Coating Materials[J]. China's Refractories, 2023, 32(4): 38-41.

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Effect of ZrO₂ Addition on Lanthanum Aluminate-based High Emissivity Coating Materials

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