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Mechanical properties of 1 mol% CeO 2 ‐10 mol% Sc 2 O 3 co‐doped and stabilized ZrO 2 synthesized through hydro/solve‐thermal method
Author(s) -
Liu Yuchen,
Chen Xiaoyu,
Yao Rui,
Liao Songyi,
Chen Weiping,
Nie Donghong,
Wang Yueming,
Zheng Feng
Publication year - 2017
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12652
Subject(s) - materials science , analytical chemistry (journal) , nanoindentation , high resolution transmission electron microscopy , fourier transform infrared spectroscopy , sintering , scanning electron microscope , grain size , phase (matter) , agglomerate , pellets , chemical engineering , transmission electron microscopy , nuclear chemistry , composite material , nanotechnology , chromatography , chemistry , organic chemistry , engineering
Ultra‐fine 1 mol% CeO 2 ‐10 mol% Sc 2 O 3 co‐doped and stabilized ZrO 2 (1Ce10Sc SZ ) powders with average grain size less than 10 nm in diameter were prepared by hydro/solve‐thermal method using either deionized water, ethanol, or methanol as solvent. As‐synthesized powders were characterized in terms of phase structure, particle morphology, and chemical composition by X‐ray diffraction ( XRD ), Fourier transform infrared spectroscopy ( FTIR ), high‐resolution transmission electron microscopy ( HRTEM ), and inductively coupled plasma‐optical emission spectroscopy ( ICP ‐ OES ), respectively. Sintering studying was conducted on pellets of 15 mm in diameter and 3 mm in thickness under uniaxial compaction using 25 MPa at either 600, 800, 1000, 1100, 1200, 1400, or 1500°C for 1 hour. Phase transitions and grain morphologies of those sintered samples were characterized by XRD and field emission scanning electron microscopy ( FESEM ). Mechanical properties were characterized on dense pellets sintered at 1500°C by nanoindentation. Experimental results showed that ethanol was more effective to synthesize agglomerate‐free 1Ce10Sc SZ powders as compared with deionized water and methanol. Choice of solvent affected the environment of hydro/solve‐thermal solution, which led to variation of chemical compositions of powders and porosities of sintered pellets, and therefore, influenced their mechanical performance. Our study showed that solvent was important to make dense, thin, and mechanically robust 1Ce10Sc SZ electrolyte for potential applications in electrochemical devices. Absolute values of hardness ( H ) and Young's modulus ( E ) measured from our samples are much higher and more consistence than those results obtained from commercial vendors reported in literatures.