TY - JOUR
T1 - (Sm0.2Eu0.2Tb0.2Dy0.2Lu0.2)2Si2O7
T2 - A novel high-entropy rare earth disilicate porous ceramics with high porosity and low thermal conductivity
AU - Liu, Debao
AU - Jia, Xinlei
AU - Shi, Baolu
AU - Wang, Yiguang
AU - Xu, Baosheng
N1 - Publisher Copyright:
© 2022
PY - 2022/7/1
Y1 - 2022/7/1
N2 - Herein, a novel quinary high-entropy rare earth disilicate (Sm0.2Eu0.2Tb0.2Dy0.2Lu0.2)2Si2O7 ((5RE1/5)2Si2O7) porous ceramics were synthesized through a sol-gel/vacuum freeze-drying method with high-temperature calcination process. The microstructure, phase composition, thermal conductivity, compressive strength, and thermal stability of the as-prepared (5RE1/5)2Si2O7 porous ceramics were systematically investigated. The results indicated that the samples possess high porosity of 76.83%, pore size of 0.3–1.2 μm, homogeneous microstructure with small grain size of 400–800 nm, which results in low thermal conductivity of 0.94 W/(m·K) at 1273 K and high compressive strength of 6.55 MPa. These excellent properties indicated that as-prepared (5RE1/5)2Si2O7 porous ceramics has a great potential application value in the field of high-temperature thermal insulation materials.
AB - Herein, a novel quinary high-entropy rare earth disilicate (Sm0.2Eu0.2Tb0.2Dy0.2Lu0.2)2Si2O7 ((5RE1/5)2Si2O7) porous ceramics were synthesized through a sol-gel/vacuum freeze-drying method with high-temperature calcination process. The microstructure, phase composition, thermal conductivity, compressive strength, and thermal stability of the as-prepared (5RE1/5)2Si2O7 porous ceramics were systematically investigated. The results indicated that the samples possess high porosity of 76.83%, pore size of 0.3–1.2 μm, homogeneous microstructure with small grain size of 400–800 nm, which results in low thermal conductivity of 0.94 W/(m·K) at 1273 K and high compressive strength of 6.55 MPa. These excellent properties indicated that as-prepared (5RE1/5)2Si2O7 porous ceramics has a great potential application value in the field of high-temperature thermal insulation materials.
KW - Compressive strength
KW - High-entropy rare earth disilicate
KW - Porous ceramics
KW - Thermal conductivity
KW - Thermal stability
UR - http://www.scopus.com/inward/record.url?scp=85129334494&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2022.126181
DO - 10.1016/j.matchemphys.2022.126181
M3 - Article
AN - SCOPUS:85129334494
SN - 0254-0584
VL - 286
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 126181
ER -