Y2O3与Gd2O3共掺杂SrZrO3热障涂层材料的热物理性能

doi:10.3724/SP.J.1077.2012.00209

无机材料学报 ›› 2012, Vol. 27 ›› Issue (2): 209-213.DOI: 10.3724/SP.J.1077.2012.00209 CSTR: 32189.14.SP.J.1077.2012.00209

Y₂O₃与Gd₂O₃共掺杂SrZrO₃热障涂层材料的热物理性能

马文¹, 宋峰雨¹, 董红英², 许萍¹, 伦文山¹, 郑学斌³

(1. 内蒙古工业大学材料科学与工程学院, 呼和浩特 010051; 2. 内蒙古工业大学化工学院, 呼和浩特 010051; 3. 中国科学院上海硅酸盐研究所, 特种无机涂层重点实验室, 上海 200050)

收稿日期:2011-02-12 修回日期:2011-03-23 出版日期:2012-02-10 网络出版日期:2012-01-05
基金资助:
国家自然科学基金(51062012);教育部重点项目(210035);内蒙古自然科学基金(2009BS0802);中国科学院特种无机涂层重点实验室开放课题基金

Thermophysical Properties of Y₂O₃ and Gd₂O₃ Co-doped SrZrO₃ Thermal Barrier Coating Material

MA Wen¹, SONG Feng-Yu¹, DONG Hong-Ying², XU Ping¹, LUN Wen-Shan¹, ZHENG Xue-Bin³

(1. School of Materials Science and Engineering, Inner Mongolia University of Technology, Huhhot 010051, China; 2. School of Chemistry Engineering, Inner Mongolia University of Technology, Huhhot 010051, China; 3. Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)

Received:2011-02-12 Revised:2011-03-23 Published:2012-02-10 Online:2012-01-05
Supported by:
National Natural Science Foundation of China (51062012);Key Project of Chinese Ministry of Education (210035);Natural Science Foundation of Inner Mongolia (2009BS0802);Opening Project of Key Laboratory of Inerganic Cating Materials, Chinese Academy of Sciences

摘要/Abstract

摘要：

采用固相反应法合成了5mol% Y₂O₃与5mol% Gd₂O₃共掺杂SrZrO₃(Sr(Zr_0.9Y_0.05Gd_0.05)O_2.95, SZYG)粉末. 采用X射线衍射(XRD)和差示扫描量热仪(DSC)分别研究了SZYG粉末在1450℃长期热处理后以及200~1400℃范围内的相稳定性. 采用高温热膨胀仪测量了SZYG块材的热膨胀系数, 结果表明: 通过Y₂O₃与Gd₂O₃共掺杂改性可以明显抑制SrZrO₃的相转变. 在1000℃下SZYG块材的热导率是~1.36 W/(m·K), 与SrZrO₃和8YSZ 块材相比降低~35% SZYG分别与8YSZ和Al₂O₃在1250℃热处理24 h表现出很好的化学相容性.

关键词: 热障涂层, 钙钛矿, 热物理性能, 稀土氧化物

Abstract:

Y₂O₃ (5mol%) and Gd₂O₃ (5mol%) co-doped SrZrO₃ (Sr(Zr_0.9Y_0.05Gd_0.05)O_2.95, SZYG) was synthesized by solid state reaction method. The phase stability of the SZYG powder synthesized at high temperature of 1450℃ for a long period and at temperature range of 200-1400℃ was characterized by XRD and DSC, respectively. The coefficients of thermal expansion (CTEs) of bulk SZYG recorded by a high-temperature dilatometer show that the phase transitions of SrZrO₃ is suppressed remarkably by co-doping Y₂O₃ and Gd₂O₃. The thermal conductivity of bulk SZYG at 1000℃ is 1.36 W/(m·K), which is 35% lower than that of bulk SrZrO₃ and 8YSZ. The good chemical compatibility of SZYG with 8YSZ and Al₂O₃, is detected after heat-treatment at 1250℃ for 24 h.

Key words: thermal barrier coatings, perovskite, thermophysical properties, rare earth oxides

中图分类号:

TG174

马文, 宋峰雨, 董红英, 许萍, 伦文山, 郑学斌. Y₂O₃与Gd₂O₃共掺杂SrZrO₃热障涂层材料的热物理性能[J]. 无机材料学报, 2012, 27(2): 209-213.

MA Wen, SONG Feng-Yu, DONG Hong-Ying, XU Ping, LUN Wen-Shan, ZHENG Xue-Bin. Thermophysical Properties of Y₂O₃ and Gd₂O₃ Co-doped SrZrO₃ Thermal Barrier Coating Material[J]. Journal of Inorganic Materials, 2012, 27(2): 209-213.

图/表 6

图1 SZYG粉末1450℃烧结不同时间后产物的XRD图谱

Fig. 1 XRD patterns of SZYG powder sintered at 1450℃ for different times

图2 SZYG与SrZrO3粉末的DSC曲线

Fig. 2 DSC curves of as-synthesized SZYG and SrZrO3 powders

图3 SZYG、Sr(Zr0.8Gd0.2)O2.9与SrZrO3块材的热膨胀系数

Fig. 3 Coefficients of thermal expansion of bulk SZYG, Sr(Zr0.8Gd0.2)O2.9 and SrZrO3

图4 SZYG、Sr(Zr0.8Gd0.2)O2.9与SrZrO3块材的热扩散系数

Fig. 4 Thermal diffusivities of bulk SZYG, Sr(Zr0.8Gd0.2)O2.9 and SrZrO3

图5 SZYG、Sr(Zr0.8Gd0.2)O2.9与SrZrO3块材的热导率

Fig. 5 Thermal conductivities of bulk SZYG, Sr(Zr0.8Gd0.2)O2.9 and SrZrO3

图6 SZYG+8YSZ(a)与SZYG+Al2O3(b)混合粉末在1250℃热处理24 h后的XRD图谱

Fig. 6 XRD patterns of SZYG+8YSZ (a) and SZYG+Al2O3 (b) mixtures after heat-treated at 1250℃ for 24 h

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Y₂O₃与Gd₂O₃共掺杂SrZrO₃热障涂层材料的热物理性能

Thermophysical Properties of Y₂O₃ and Gd₂O₃ Co-doped SrZrO₃ Thermal Barrier Coating Material

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