Journals →
Materialy Elektronnoi Tekhniki →
2010 →
#2 →
Back
Back
| MATERIALS SCIENCE AND TECHNOLOGY. MAGNETIC MATERIALS | |
| ArticleName | Study of the effect of strontium hexaferrite powder grinding duration on the microstructure and properties of powder–based magnets |
| ArticleAuthor | V.G. Andreev, I.I. Kaneva, S.V. Podgornaya and A.N. Tikhonov |
| ArticleAuthorData | V.G. Andreev, Kuznetsk Institute of Informatics and Management Technologies (Branch of the Penza State University); I.I. Kaneva, S.V. Podgornaya and A.N. Tikhonov, (National Research University «MISiS»). |
| Abstract | The effect of additional grinding duration of strontium hexaferrite powder produced by Olkon JSC on the microstructure and properties of powder-based products has been studied. We show that additional ball mill grinding of the source powder greatly increases the particle size distribution homogeneity and the activity of the particles due to the induction of microstrain in the crystal lattice. Powder quality improvement produces a homogeneous fine-grained as-sintered microstructure in contrast to the heavily inhomogeneous microstructure with island-type grain size variation obtained from source powder. Optimum additional grinding duration of 8 h and sintering at 1230 oC increased the magnetic properties of strontium hexaferrite by 14—17 %. |
| keywords | Microstructure, particle aggregation, strontium hexaferrite. |
| References | 1. Anciferov, V. N. Problemy poroshkovogo materialovedenija / V. N. Anciferov, L. M. Letjuk, V. G. Andreev - M. : Metallurgija, 2005. - Part. V. - P. 183. 2. Fedorov, A. N. Zakonomernosti fazovyh i strukturnyh prevrawenij v anizotropnyh ferritah barija i puti ih ispol'zovanija v tehnologii oksidnyh magnitov / A. N. Fedorov - Diss. … kand. tehn. nauk. - M. : MISiS, 1990. - 190 p. 3. Gorelik, S. S. Formirovanie mikrostruktury i svojstv ferritov v processe rekristallizacii / S. S. Gorelik, Je. A. Babich, L. M. Letjuk. - M. : Metallurgija, 1984. - P. 108. 4. Anciferov, V. N. Problemy poroshkovogo materialovedenija / V. N. Anciferov, L. M. Letjuk, V. G. Andreev. - M. : Metallurgija. - 2003. - Part III. - P. 146. 5. Tonkaja tehnicheskaja keramika. - M. : Metallurgija, 1986. 6. Penskij, N. V. Puti upravlenija parametrami mikrostruktury ferritov s prjamougol'noj petlej gisterezisa / N. V. Pen skij - Diss. ... kand. tehn. nauk. - M. : MISiS, 1981. 137 p. 7. Gorelik, S. S. Ocenka aktivnosti ferritovyh poroshkov s pomow'ju jenergii mikroiskazhenij / S. S. Gorelik, B. E. Levin, I. I. Kaneva - Sb.: -Struktura i svojstva ferritov-. - Minsk : Nauka i tehnika, 1974. - P. 128—132. 8. Caturjan, S. A. Nekotorye voprosy fiziki vysokokojercitivnogo sostojanija ferrita barija / S. A. Caturjan // Jelektron. tehnika. - 1969. - N 1. |
| Language of full-text | russian |
| Full content | Buy |
