Er2O3掺杂Gd2(Zr0.8Ti0.2)2O7陶瓷的物理性能

doi:10.11901/1005.3093.2021.230

材料研究学报

2022, Vol. 36

Issue (1): 49-54 DOI: 10.11901/1005.3093.2021.230

研究论文

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Er₂O₃掺杂Gd₂(Zr_0.8Ti_0.2)₂O₇陶瓷的物理性能

李瑞一, 谢敏(

), 张永和, 裴训, 刘洋, 宋希文

内蒙古科技大学材料与冶金学院包头 014010

Physical Properties of Er₂O₃ Doped Gd₂(Zr_0.8Ti_0.2)₂O₇ Ceramic Materials

LI Ruiy, XIE Min(

), ZHANG Yonghe, PEI Xun, LIU Yang, SONG Xiwen

School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China

引用本文:

李瑞一, 谢敏, 张永和, 裴训, 刘洋, 宋希文. Er₂O₃掺杂Gd₂(Zr_0.8Ti_0.2)₂O₇陶瓷的物理性能[J]. 材料研究学报, 2022, 36(1): 49-54.
Ruiy LI, Min XIE, Yonghe ZHANG, Xun PEI, Yang LIU, Xiwen SONG. Physical Properties of Er₂O₃ Doped Gd₂(Zr_0.8Ti_0.2)₂O₇ Ceramic Materials[J]. Chinese Journal of Materials Research, 2022, 36(1): 49-54.

全文: PDF(961 KB) HTML

摘要:

用固相反应法制备(Gd_1-_xEr_x)₂(Zr_0.8Ti_0.2)₂O₇(摩尔分数x=0，0.2，0.4)陶瓷并测试其晶体结构、显微形貌和物理性能，研究了Er₂O₃掺杂的影响。结果表明，(Gd_1-_xEr_x)₂(Zr_0.8Ti_0.2)₂O₇陶瓷具有立方烧绿石结构，显微结构致密，在室温至1200℃高温相的稳定性良好；Er³⁺掺杂降低了陶瓷材料的热导率和平均热膨胀系数，当x=0.2时，其1000℃的热导率最低(为1.26 W·m^-1·k^-1)。同时，Er³⁺掺杂还提高了这种材料的硬度和断裂韧性。

关键词 ：无机非金属材料, 热障涂层材料, 烧绿石结构, 热物理性能, 增韧

Abstract：

Er₂O₃ doped ceramic materials (Gd_1-_xEr_x)₂(Zr_0.8Ti_0.2)₂O₇ (x=0, 0.2,0.4, x is mole fraction) were prepared by solid-state reaction method, the crystallographic structure, microstructure, thermophysical properties and mechanical properties of the materials were examined in terms of the effect of Er₂O₃ doping. The results show that (Gd_1-_xEr_x)₂(Zr_0.8Ti_0.2)₂O₇ ceramic material presents the same crystallographic structure as cubic pyroclase with good high temperature phase stability from room temperature to 1200℃. Er³⁺ doping can reduce the thermal conductivity and the average thermal expansion coefficient of the ceramic materials, peculiarly, the thermal conductivity of (Gd_0.8Er_0.2)₂(Zr_0.8Ti_0.2)₂O₇ ceramic material is the lowest at 1000℃, which is 1.26 W·m^-1·k^-1. In addition, the doping of Er³⁺ can improve the hardness and fracture toughness of the material.

Key words： inorganic non-metallic materials thermal barrier coating materials pyrochlore thermal properties enhanced toughness

收稿日期: 2021-04-15

ZTFLH:

TG174.45

基金资助:国家自然科学基金(51762036);内蒙古自治区应用技术研究与开发资源资金项目

作者简介: 李瑞一，男，1996年生，工学硕士

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链接本文:

https://www.cjmr.org/CN/10.11901/1005.3093.2021.230 或 https://www.cjmr.org/CN/Y2022/V36/I1/49

图1 (Gd1-xErx)2(Zr0.8Ti0.2)2O7的 XRD谱

表1 (Gd1-xErx)2(Zr0.8Ti0.2)2O7陶瓷材料晶胞参数、离子半径及相对密度

图2 (Gd0.8Er0.2)2(Zr0.8Ti0.2)2O7陶瓷表面的SEM照片

图3 (Gd1-xErx)2(Zr0.8Ti0.2)2O7的线变化率

图4 (Gd1-xErx)2(Zr0.8Ti0.2)2O7的热扩散系数

图5 (Gd1-xErx)2(Zr0.8Ti0.2)2O7的热导率

图6 (Gd1-xErx)2(Zr0.8Ti0.2)2O7的硬度和断裂韧性

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