Stepwise synthesis of fine crystalline Ce-doped yttrium aluminum garnet in water medium in subcritical and supercritical conditions

Danchevskaya, M.N.; Ivakin, Y.D.; Maryashkin, A.V.; Muravieva, G.P.

Авторы: Danchevskaya M.N., Ivakin Yu D., Maryashkin A.V., Muravieva G.P.
Журнал: Russian Journal of Physical Chemistry B
Том: 5
Номер: 7
Год издания: 2011
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 1056
Последняя страница: 1068
DOI: 10.1134/S1990793111070025
Аннотация: In this paper the continuous stepwise method of a production of fine crystalline yttrium aluminum garnet doped with cerium (YAG : Ce(3+)) in supercritical water fluid (SCWF) are represented. The synthesis was carried out in water medium in two stages: first in subcritical conditions and then in an atmosphere of supercritical water fluid. The stoichiometric mixture of yttrium oxide and aluminum hydroxide in a water solution of cerium nitrate was maintained the certain time at 280 degrees C and under vapor water pressure 6.3 MPa. Then temperature and pressure were risen up to a supercritical condition (T = 392-400 degrees C, P(H2O) = 22 MPa). The concentration of cerium ions in reaction medium was changed in the interval 0.012-0.706 wt %. The products, obtained on various stages of synthesis, were investigated by physical-chemical methods. During the first stage, the crystals of boehmite and yttrium hydroxide under hydrothermal conditions were arising, and eventually poorly formed YAG : Ce(3+) were appearing. At this stage, the diffusion of cerium ions into intermediate products takes place. Because of this, at the second step of synthesis, in supercritical conditions, YAG : Ce(3+), phosphor with high luminescence intensity at 530 nm, was obtained. In supercritical conditions well-faceted crystals of 0.5-3.0 mu m with rhombododecahedral habitus were produced.
Добавил в систему: Муравьева Галина Петровна

	ИСТИНА	Войти в систему Регистрация
	ИСТИНА ЦЭМИ РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИСТИНА ЦЭМИ РАН

Stepwise synthesis of fine crystalline Ce-doped yttrium aluminum garnet in water medium in subcritical and supercritical conditionsстатья

Прикрепленные файлы