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| MATERIALS SCIENCE AND TECHNOLOGY. MAGNETIC MATERIALS | |
| ArticleName | Effect of stoichiometry deviation on the phase composition and properties of Y—Al ferrogarnet |
| ArticleAuthor | Yu.N. Afanas’ev, <span class="line">I.S. Rybachuk</span>, I.I. Kaneva, D.G. Krutogin, A.A. Mekhanikova |
| ArticleAuthorData | Yu.N. Afanas’ev, (Almaz-Antei OAO GSKB); I.S. Rybachuk, I.I. Kaneva, D.G. Krutogin, A.A. Mekhanikova, (National Research University MISiS) |
| Abstract | The effect of stoichiometry deviation towards Fe2O3 excess or deficiency on the microstructure and properties of yttriumaluminum ferrogarnet has been studied. We show that for Fe2O3 excess, the Fe3O4 magnetite phase grows along with the ferrogarnet phase, while for Fe2O3 deficiency, the YFeO3 orthoferrite phase develops. For Fe2O3 excess, the densening onset occurs later, at a higher temperature compared to that for the stoichiometric composition. This property allows one to separate the garnet formation and the proper sintering processes in the temperature and time ranges. To obtain high density ferrogarnet one should increase the sintering temperature by 100 oC compared to that for the stoichiometric composition. We found that the two-phase material containing (along with the matrix ferrogarnet phase) the YFeO3 phase has higher magnetic properties compared to the single-phase stoichiometric composition and one order of magnitude lower dielectric losses due to the absence of ferrous cations and the properties of YfeO3. |
| keywords | Ferrogarnet, dielectric losses, yttrium orthoferrite, magnetite. |
| References | 1. Levin, B. E. Fiziko-himicheskie osnovy poluchenija,
svojstva i primenenie ferritov / B. E. Levin, Ju. D. Tret'jakov,
L. M. Letjuk. - M. : Metallurgija, 1979. - P. 471. 2. Anciferov, V. N. Problemy poroshkovogo materialovedenija / V. N. Anciferov, L. M. Letjuk, V. G. Andreev. - M. : Metallurgija, 2005. - Part V. - P. 183. 3. Letjuk, L. M. Himija i tehnologija ferritov. / L. M. Letjuk, G. I. Zhuravlev.- L. : Himija, 1983. - P. 106. 4. Letjuk, L. M. Tehnologija proizvodstva materialov magnitojelektroniki / L. M. Letjuk, A. M. Balbashov, D. G. Krutogin, A. V. Gonchar, I. G. Kudrjashkin, A. M. Saldugej. - M. : Metallurgija, 1994. - P. 257. |
| Language of full-text | russian |
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