Content and diffusion of water and gases in MgAl2O4 spinel crystals synthesized to produce ceramics

Kreisberg, V.A.; Ivakin, Y.D.; Danchevskaya, M.N.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 6 декабря 2018 г.

Авторы: Kreisberg Valery A., Ivakin Yurii D., Danchevskaya Marina N.
Журнал: Journal of the European Ceramic Society
Том: 39
Номер: 2-3
Год издания: 2019
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 508
Последняя страница: 513
DOI: 10.1016/j.jeurceramsoc.2018.09.031
Аннотация: Content, evolution and diffusion characteristics of water and gases in fine-crystalline spinel MgAl2O4 were studied by kinetic thermodesoption mass spectrometry. Water is the main volatile component by quantity in the spinel structure. From the spinel crystals with an average size of 0.52 μm, water is released in vacuum in three temperature ranges: at 100-200 °C due to desorption from micropores, at 300-600 °C due to near-surface dehydroxylation and at 500-800 °C due to diffusion of water from the crystal bulk. The content of structural water, diffusively released from the crystals, is about 3000 ppm. The coefficients and activation energy of diffusion of water from spinel crystals in the range 500–700 °C were calculated. This allows us to estimate at any temperature the degassing time of the spinel with a certain degree of dispersion and ceramics made of it, and thereby promote the production of high-quality ceramics.
Добавил в систему: Крейсберг Валерий Абрамович

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Content and diffusion of water and gases in MgAl2O4 spinel crystals synthesized to produce ceramicsстатья

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