Перевод названия: ANION EXCHANGE SYNTHESIS OF RARE EARTH FERRITES
Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций
Конференция: XXV КОНФЕРЕНЦИЯ «АЛЮМИНИЙ СИБИРИ»; XV КОНФЕРЕНЦИЯ «ЗОЛОТО СИБИРИ»; XIII КОНФЕРЕНЦИЯ «МЕТАЛЛУРГИЯ ЦВЕТНЫХ, РЕДКИХ И БЛАГОРОДНЫХ МЕТАЛЛОВ »; Красноярск; Красноярск
Год издания: 2019
Аннотация: Описан способ получения нанопорошков железо-гадолиниевого и железоиттербиевого гранатов с применением метода анионообменного осаждения. Проведено исследование влияния реакционных параметров на выход продуктов осаждения. Методами химического анализа, РФА и электронной микроскопии исследован элементный состав, морфология и структура как прекурсоров, так и продуктов их обжига при температурах 800 0С, 900 0С и 1000 0С. Rare earth iron garnets (RIG) is an important class of ferrimagnetic semiconductor materials with R3Fe5O12 garnet structure. Due to its magnetic and optical properties, RIG is used in microelectronics, magneto-optics, thermomagnetic recording, laser and microwave technology . For example, owing to high resistivity and low microwave losses, gadolinium iron garnets (GdIG) are useful materials for non-reciprocal devices such as circulators or isolators. For the synthesis of R3Fe5O12, the methods such as solid state reaction, the sol-gel process and chemical coprecipitation are most often used. Every presented method have some drawbacks. For example, if we use the method of chemical coprecipitation, it is necessary to carefully control the pH of the process; in addition, the precipitate is contaminated by precipitating ions, which as a result can provoke a violation of the stoichiometry of the product and change its properties. In the present study, we carried out the synthesis of R3Fe5O12 (R = Gd, Yb) by using the method of anion exchange resin precipitation. This method has many advantages such as high yield homogeneous and finely dispersed of product; the possibility of regeneration of anion exchange resin and its reuse, the absence of toxic, combustible and explosive components in the system. The effect of the brand of anion exchange resin, the type of the resin counterions (OH or CO3) and the time of the process on the yield of precipitation products were performed in the study. The elemental composition, morphology and structure of precursors and their calcination products at 800 0С, 900 0С and 1000 0С have been studied by chemical analysis, XRD,IR spectroscopy, complex thermal analysis (TGA/DSC), and electron microscopy.
Журнал: ЦВЕТНЫЕ МЕТАЛЛЫ И МИНЕРАЛЫ - 2019
Номера страниц: 1033-1037
Издатель: Общество с ограниченной ответственностью "Научно-инновационный центр"