Effect of Nucleators and Intermediates on the Magnetic Properties of Nanosized Magnetite Obtained by Glass Crystallization
We investigate the role of chromium and phosphorous oxides on the growth and magnetic properties of crystallized Fe-containing borosilicate glasses as well as their evolution under different thermal processing. The glasses have the ratio between SiO2 and Fe2O3 in the range 1.49 to 2.68 and Al2O3 /MgO as intermediate/modifier oxides. X-ray diffraction and M鰏sbauer spectroscopy data revealed the presence of magnetite as the major crystalline phase in all asprepared samples but additional amounts of hematite and of Fe-rich paramagnetic phases are also visible in some samples. The magnetic response is correlated with the disorder observed in the different sites (tetrahedral and octahedral) of the magnetite.
Viorel Sandu Mirela Sidonia Nicolescu Victor Kuncser Stelian Popa Iuliana Pasuk Elena Sandu
National Institute of Materials Physic-Bucharest, 105b Atomistilor str, Magurele, 077125 Romania Horia Hulubei National Institute of Physics and Nuclear Engineering 407 Atomistilor Str.,Magurele, 0
国际会议
桂林
英文
1-12
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）