Physical Properties of Er2O3 Doped Gd2(Zr0.8Ti0.2)2O7 Ceramic Materials

doi:10.11901/1005.3093.2021.230

Chinese Journal of Materials Research

2022, Vol. 36

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

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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

Cite this article:

LI Ruiy, XIE Min, ZHANG Yonghe, PEI Xun, LIU Yang, SONG Xiwen. Physical Properties of Er₂O₃ Doped Gd₂(Zr_0.8Ti_0.2)₂O₇ Ceramic Materials. Chinese Journal of Materials Research, 2022, 36(1): 49-54.

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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

Received: 15 April 2021

ZTFLH:

TG174.45

Fund: National Natural Science Foundation of China(51762036);Inner Mongolia Autonomous Region Applied Technology Research and Development Resources Fund Project

About author: XIE Min, Tel: 15848818208, E-mail: 59956941@qq.com

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	Ruiy LI
	Min XIE
	Yonghe ZHANG
	Xun PEI
	Yang LIU
	Xiwen SONG

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https://www.cjmr.org/EN/10.11901/1005.3093.2021.230 OR https://www.cjmr.org/EN/Y2022/V36/I1/49

Fig.1 XRD patterns of (Gd_1-_xEr_x)₂(Zr_0.8Ti_0.2)₂O₇ceramics

Table 1 Lattice parameters,ion radius and relative density of (Gd_1-_xEr_x)₂(Zr_0.8Ti_0.2)₂O₇ ceramics

Fig.2 SEM photograph of (Gd_1-_xEr_x)₂(Zr_0.8Ti_0.2)₂O₇ ceramics

Fig.3 Linear change rate of (Gd_1-_xEr_x)₂(Zr_0.8Ti_0.2)₂O₇ ceramics

Fig.4 Thermal diffusivities of (Gd_1-_xEr_x)₂(Zr_0.8Ti_0.2)₂O₇ ceramics

Fig.5 Thermal conductivities of (Gd_1-_xEr_x)₂(Zr_0.8Ti_0.2)₂O₇ ceramics

Fig.6 Hardness and fracture toughness of (Gd_1-_xEr_x)₂(Zr_0.8Ti_0.2)₂O₇ ceramics

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