Nanostructured Ferrite Formation in Borosilicate Glass

Viorel Sandu; Stelian Popa; Iuliana Pasuk; Ionut Enculescu; Mirela Sidonia Nicolescu; Simona Radicescu

doi:10.4028/www.scientific.net/AMR.79-82.445

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 79-82Nanostructured Ferrite Formation in Borosilicate...

Nanostructured Ferrite Formation in Borosilicate Glass

Abstract:

We present the preparation, structural, and magnetic properties of a series of Fe-containing borosilicate glasses as a function of the ratio SiO2/Fe2O3 which is ranging from 1.49 to 2.68. The role of nucleators (Cr2O3 and P2O5) was also investigated. X-Ray diffraction has revealed the formation of magnetite as the major or unique crystalline phase. As SEM micrographs have revealed, the addition of P2O5 give rise to a finer structure as compared with Cr2O3. In addition, the same oxide decreases the temperature of structural transition with almost 100 °C. The magnetization data reveal a two step transition at low temperatures: a high temperature transition at Tv = 128 K, which we attribute to the Verwey transition, and a low temperature transition at Ts = 48 K which, most likely, is the result of change in the dynamic of the domain motion.

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Periodical:

Advanced Materials Research (Volumes 79-82)

Pages:

445-448

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.79-82.445

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Online since:

August 2009

Authors:

Viorel Sandu, Stelian Popa, Iuliana Pasuk, Ionut Enculescu, Mirela Sidonia Nicolescu, Simona Radicescu

Keywords:

Borosilicate Glass, Crystallization, Ferrimagnetism, Magnetite, Verwey Transition

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