Research output: Contribution to journal › Article › peer-review
Phase composition, thermal and transport properties of the system based on the mono- and dihydrogen phosphates of rubidium. / Gaydamaka, Anna A.; Ponomareva, Valentina G.; Bagryantseva, Irina N.
In: Solid State Ionics, Vol. 329, 01.01.2019, p. 124-130.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Phase composition, thermal and transport properties of the system based on the mono- and dihydrogen phosphates of rubidium
AU - Gaydamaka, Anna A.
AU - Ponomareva, Valentina G.
AU - Bagryantseva, Irina N.
N1 - Publisher Copyright: © 2018
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Phase composition and phase transitions, spectral characteristics, thermal and transport properties of the (1-x)RbH2PO4 – xRb2HPO4 · yH2O system at the wide range of х = 0–1 were investigated. No solid solutions were observed at the system. A monophasic region at х = 0.25 with the compound Rb5H7(PO4)4 was found. The thermodynamic and transport properties of Rb5H7(PO4)4 were studied in detail. The other compositions correspond to diphasic mixtures of two salts: RbH2PO4 and Rb5H7(PO4)4 (х = 0–0.2), or Rb2HPO4·yH2O and Rb5H7(PO4)4 (at х higher 0.25). The sharp increase of proton conductivity up to 3·10−2 S/cm under highly humidified conditions was found for х = 0.1–0.25 at temperatures >240 °С can be associated with the superionic phase transitions of RbH2PO4 and Rb5H7(PO4)4. A weak composite effect with a slight increase of conductivity (about one order of magnitude) at low temperatures compared to those for the pure salts RbH2PO4 and Rb2HPO4·2H2O was shown for all samples.
AB - Phase composition and phase transitions, spectral characteristics, thermal and transport properties of the (1-x)RbH2PO4 – xRb2HPO4 · yH2O system at the wide range of х = 0–1 were investigated. No solid solutions were observed at the system. A monophasic region at х = 0.25 with the compound Rb5H7(PO4)4 was found. The thermodynamic and transport properties of Rb5H7(PO4)4 were studied in detail. The other compositions correspond to diphasic mixtures of two salts: RbH2PO4 and Rb5H7(PO4)4 (х = 0–0.2), or Rb2HPO4·yH2O and Rb5H7(PO4)4 (at х higher 0.25). The sharp increase of proton conductivity up to 3·10−2 S/cm under highly humidified conditions was found for х = 0.1–0.25 at temperatures >240 °С can be associated with the superionic phase transitions of RbH2PO4 and Rb5H7(PO4)4. A weak composite effect with a slight increase of conductivity (about one order of magnitude) at low temperatures compared to those for the pure salts RbH2PO4 and Rb2HPO4·2H2O was shown for all samples.
KW - A60
KW - ac-impedance spectroscopy
KW - Dihydrophosphate of rubidium
KW - Hydrophosphate of rubidium dihydrate
KW - IR-spectroscopy
KW - Proton conductivity
KW - PROTON CONDUCTIVITY
KW - HIGH-TEMPERATURE
KW - CSH2PO4
KW - SUPERPROTONIC CONDUCTIVITY
KW - DEHYDRATION BEHAVIOR
KW - RBH2PO4
KW - BONDS
KW - TRANSITIONS
UR - http://www.scopus.com/inward/record.url?scp=85057726903&partnerID=8YFLogxK
U2 - 10.1016/j.ssi.2018.12.005
DO - 10.1016/j.ssi.2018.12.005
M3 - Article
AN - SCOPUS:85057726903
VL - 329
SP - 124
EP - 130
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
ER -
ID: 17827818