Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Effect of SiO2 Concentration on the Electrical Conductivity of M2(WO4)3/SiO2 (M = La, Sm) Composites
AU - Guseva, A. F.
AU - Pestereva, N. N.
AU - Pyrlik, E. V.
AU - Korona, D. V.
PY - 2022/6/1
Y1 - 2022/6/1
N2 - Composites with the general formulas (1 – x)La2(WO4)3–xSiO2 and (1 – x)Sm2(WO4)3–xSiO2 have been prepared by solid-state reactions. The phase composition and thermodynamic stability of the composites have been demonstrated by X-ray diffraction and thermal analysis (thermogravimetry and differential scanning calorimetry), respectively. The morphology of the composites has been examined by scanning electron microscopy in combination with energy dispersive spectroscopy. The electrical conductivity of the composites has been measured as a function of temperature and oxygen pressure and shown to have an ionic character. Heterogeneous doping of lanthanum and samarium tungstates has been found to have opposite effects: the addition of 1–5 mol % SiO2 nanopowder to La2(WO4)3 leads to an increase in its electrical conductivity by seven times, whereas analogous heterogeneous doping of Sm2(WO4)3 reduces its electrical conductivity.
AB - Composites with the general formulas (1 – x)La2(WO4)3–xSiO2 and (1 – x)Sm2(WO4)3–xSiO2 have been prepared by solid-state reactions. The phase composition and thermodynamic stability of the composites have been demonstrated by X-ray diffraction and thermal analysis (thermogravimetry and differential scanning calorimetry), respectively. The morphology of the composites has been examined by scanning electron microscopy in combination with energy dispersive spectroscopy. The electrical conductivity of the composites has been measured as a function of temperature and oxygen pressure and shown to have an ionic character. Heterogeneous doping of lanthanum and samarium tungstates has been found to have opposite effects: the addition of 1–5 mol % SiO2 nanopowder to La2(WO4)3 leads to an increase in its electrical conductivity by seven times, whereas analogous heterogeneous doping of Sm2(WO4)3 reduces its electrical conductivity.
KW - composite conductivity effect
KW - composite solid electrolytes
KW - heterogeneous doping
KW - lanthanum tungstate
KW - nanoparticulate silicon oxide
KW - samarium tungstate
UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=000854863300008
UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85138252125
U2 - 10.1134/S0020168522060036
DO - 10.1134/S0020168522060036
M3 - Article
VL - 58
SP - 612
EP - 619
JO - Inorganic Materials
JF - Inorganic Materials
SN - 0020-1685
IS - 6
ER -
ID: 30949246