Phase Composition, Thermal and Transport Properties of the System Based on the Mono- and Dihydrogen Phosphates of Rubidium | Sciact - CRIS-system of Boreskov Institute of Catalysis

Phase Composition, Thermal and Transport Properties of the System Based on the Mono- and Dihydrogen Phosphates of Rubidium Full article

Conference

13th International Symposium on Systems with Fast Ionic Transport
03-07 Jul 2018 , Минск

Journal

Solid State Ionics
ISSN: 0167-2738

Output data

Year: 2019, Volume: 329, Pages: 124-130 Pages count : 7 DOI: 10.1016/j.ssi.2018.12.005

Tags

A60; ac-impedance spectroscopy; Dihydrophosphate of rubidium; Hydrophosphate of rubidium dihydrate; IR-spectroscopy; Proton conductivity

Authors

Gaydamaka Anna A. ^1,2 , Ponomareva Valentina G. ^1,2 , Bagryantseva Irina N. ^1,2

Affiliations

1	Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, 630128 Novosibirsk, Russia
2	Novosibirsk State University, 630090 Novosibirsk, Russia

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.

Gaydamaka A.A. , Ponomareva V.G. , Bagryantseva I.N.
Phase Composition, Thermal and Transport Properties of the System Based on the Mono- and Dihydrogen Phosphates of Rubidium
Solid State Ionics. 2019. V.329. P.124-130. DOI: 10.1016/j.ssi.2018.12.005 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Aug 31, 2018
Accepted:	Dec 4, 2018
Published online:	Dec 7, 2018
Published print:	Jan 1, 2019

Web of science:	WOS:000456224500017
Scopus:	2-s2.0-85057726903
Elibrary:	38627159
Chemical Abstracts:	2018:2472418
OpenAlex:	W2905541078

DB	Citing
Web of science	15
Scopus	14
OpenAlex	13