Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Microstructure, conductivity and mechanical properties of calcia stabilized zirconia ceramics obtained from nanosized precursor and reduced graphene oxide doped precursor powders. / Kurapova, O.Y.; Glumov, O.V.; Lomakin, I.V.; Golubev, S.N.; Pivovarov, M.M.; Krivolapova, J.V.; Konakov, V.G.
в: Ceramics International, Том 44, № 13, 01.09.2018, стр. 15464-15471.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Microstructure, conductivity and mechanical properties of calcia stabilized zirconia ceramics obtained from nanosized precursor and reduced graphene oxide doped precursor powders.
AU - Kurapova, O.Y.
AU - Glumov, O.V.
AU - Lomakin, I.V.
AU - Golubev, S.N.
AU - Pivovarov, M.M.
AU - Krivolapova, J.V.
AU - Konakov, V.G.
PY - 2018/9/1
Y1 - 2018/9/1
N2 - In the work 12CaO-88ZrO 2 (12CSZ, mol%) ceramics was manufactured both from nanopowder, obtained via cryochemical technique, and composite precursor 12CSZ + 0.25 wt% rGO (reduced graphene oxide). Via SEM, XRD and Raman spectroscopy the detailed investigation of the effect of the precursor type and intermediate processing on the microstructure and electrical conductivity of ceramics was carried out. It was shown that rGO is completely removed during the annealing at 1550 °C for 3 h in air with no effect on the high ionic conductivity of ceramics. The use of nanosized powder and the additional processing step results in vacuum dense solid electrolytes characterized by well-formed cubic zirconia based solid solution, thin discontinuous grain boundaries and rather high ionic conductivity. The addition of rGO leads to slight microhardness (HV) decrease comparing to ceramics manufactured from the nanosized precursor. As a result, a new technique for zirconia based solid electrolytes having both high electrical conductivity at high temperatures and sufficient mechanical properties was suggested.
AB - In the work 12CaO-88ZrO 2 (12CSZ, mol%) ceramics was manufactured both from nanopowder, obtained via cryochemical technique, and composite precursor 12CSZ + 0.25 wt% rGO (reduced graphene oxide). Via SEM, XRD and Raman spectroscopy the detailed investigation of the effect of the precursor type and intermediate processing on the microstructure and electrical conductivity of ceramics was carried out. It was shown that rGO is completely removed during the annealing at 1550 °C for 3 h in air with no effect on the high ionic conductivity of ceramics. The use of nanosized powder and the additional processing step results in vacuum dense solid electrolytes characterized by well-formed cubic zirconia based solid solution, thin discontinuous grain boundaries and rather high ionic conductivity. The addition of rGO leads to slight microhardness (HV) decrease comparing to ceramics manufactured from the nanosized precursor. As a result, a new technique for zirconia based solid electrolytes having both high electrical conductivity at high temperatures and sufficient mechanical properties was suggested.
KW - Grain boundaries
KW - Hardness
KW - Impedance spectroscopy
KW - Ionic conductivity
KW - Reduced graphene oxide
KW - ZrO
KW - SYSTEM
KW - THERMODYNAMIC PROPERTIES
KW - HIGH-TEMPERATURE
KW - FUEL-CELLS
KW - COMPOSITES
KW - EFFUSION MASS-SPECTROMETRY
KW - ZrO2
KW - ZRO2-CAO
KW - OPERATION
KW - IMPEDANCE
KW - SOLID ELECTROLYTES
UR - http://www.scopus.com/inward/record.url?scp=85047460959&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/microstructure-conductivity-mechanical-properties-calcia-stabilized-zirconia-ceramics-obtained-nanos
U2 - 10.1016/j.ceramint.2018.05.202
DO - 10.1016/j.ceramint.2018.05.202
M3 - Article
VL - 44
SP - 15464
EP - 15471
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
IS - 13
ER -
ID: 35346283