Mechanochemical Synthesis of Solid Solutions Based on ZrO2 and Their Electrical Conductivity
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Переводная
|
| Конференция |
Structural Chemistry of Partially Ordered Systems, Nanoparticles and Nanocompositesv: Topical Meeting of the European Ceramic Society
27-29 июн. 2006
,
Saint-Petersburg
|
| Журнал |
Glass Physics and Chemistry
ISSN: 1087-6596
, E-ISSN: 1608-313X
|
| Вых. Данные |
Год: 2007,
Том: 33,
Номер: 4,
Страницы: 394-401
Страниц
: 8
DOI:
10.1134/S1087659607040141
|
| Авторы |
Zyryanov V.V.
1
,
Uvarov N.F.
1
,
Sadykov V.A.
2
|
| Организации |
| 1 |
Institute of Solid-State Chemistry and Mechanochemistry, Siberian Division, Russian Academy of Sciences, ul. Kutateladze 18, Novosibirsk, 630158 Russia
|
| 2 |
Boreskov Institute of Catalysis, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent’eva 5, Novosibirsk, 630090 Russia
|
|
Информация о финансировании (4)
|
1
|
Президиум СО РАН
|
95
|
|
2
|
Международный научно-технический центр
|
3234
|
|
3
|
Российский фонд фундаментальных исследований
|
06-03-32131
|
|
4
|
Совет по грантам Президента Российской Федерации
|
НШ-4505.2006.3
|
Zirconia-and scandia-based complex solid solutions predominantly with a monoclinic structure are prepared by mechanochemical synthesis. The dense ceramic materials, which, for the most part, have a cubic structure with grain sizes of 250–400 nm and possess good mechanical properties, are produced by sintering submicron fractions of the powders under relatively mild conditions at temperatures of 1633–1653 K. It is revealed that the powders are characterized by nanostructuring due to the complex composition and the chemical inhomogeneity. This nanostructuring is partially retained upon rapid sintering of the ceramic powders. The nanostructured ceramic materials possess a high low-temperature conductivity, which decreases after annealing. Unlike conventional ceramic materials, the nanostructured ceramic materials have identical activation energies for bulk and grain-boundary electrical conduction. The high-temperature electrical conductivity of the nanostructured ceramic materials is rather low because of the small grain sizes and impurities of the monoclinic phase.