Conductivity of fluorite-type Pr6-x WO12-1.5x tungstates (x=0.5; 0.75; 1; 1.25) / Korona D. V.,Partin G. S.,Neiman A. Ya. // RUSSIAN JOURNAL OF ELECTROCHEMISTRY. - 2015. - V. 51, l. 10. - P. 925-934.

ISSN/EISSN:

1023-1935 / 1608-3342

Type:

Article

Abstract:

Ceramic (polycrystalline) samples with the nominal composition of Pr6-x WO12-1.5x (x = 0.5; 0.75; 1; 1.25) are obtained using solid-phase synthesis. Samples with x = 0.5 and 0.75 are single-phase. The temperature dependences of conductivity (900aEuro broken vertical bar 200A degrees C) are measured in the atmospheres of dry ( = 10(-4) atm) and humid ( = 3 x 10(-2) atm) air and also when was varied from 0.21 to 10(-5) atm. The dependence of conductivity on is close to linear and is determined by the equation of log sigma a parts per thousand const + n center dot log (where n a parts per thousand 1/10 at 900A degrees C) with a positive slope characteristic for hole conductivity. The EMF technique is used to determine the temperature dependence (900aEuro broken vertical bar 200A degrees C) of ion transport numbers t(ion) (0aEuro broken vertical bar 0.02). Hole conductivity prevails. Activation energies of hole conductivity are calculated: (0.39aEuro...0.43 eV).

Author keywords:

praseodymium tungstate Pr6WO12; fluorite-type structure; structural oxygen vacancies; hole conductivity; impedance SYSTEM; ELECTROLYTE; DEFECTS; OXIDES

DOI:

10.1134/S1023193515100067

Web of Science ID:

ISI:000363053300005

Соавторы в МНС:

Другие поля

Поле	Значение
Month	OCT
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1608-3342
Keywords-Plus	SYSTEM; ELECTROLYTE; DEFECTS; OXIDES
Research-Areas	Electrochemistry
Web-of-Science-Categories	Electrochemistry
Author-Email	D.V.Korona@urfu.ru
Funding-Acknowledgement	Ural Federal University
Funding-Text	The work was financially supported by Ural Federal University as part of implementation of the Program of Development of Ural Federal University for the winners of the competition of ``Young Scientists of Ural Federal University.{''} The results were obtained as part of the work on the State Assignment of Ministry of Education and Science of the Russian Federation.
Number-of-Cited-References	12
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	5
Journal-ISO	Russ. J. Electrochem.
Doc-Delivery-Number	CT8GP