PREPARATION OF Fe/GLASS COMPOSITE BY REDUCTION OF Na۲O– Fe۲O۳–B۲O۳–SiO۲–ZnO GLASS AND GLASS CERAMICS
عنوان مقاله: PREPARATION OF Fe/GLASS COMPOSITE BY REDUCTION OF Na۲O– Fe۲O۳–B۲O۳–SiO۲–ZnO GLASS AND GLASS CERAMICS
شناسه ملی مقاله: JR_IJMSEI-12-3_004
منتشر شده در در سال 1394
شناسه ملی مقاله: JR_IJMSEI-12-3_004
منتشر شده در در سال 1394
مشخصات نویسندگان مقاله:
A. Mohammadpour
S. M. Mirkazemi
A. Beitollahi
خلاصه مقاله:
A. Mohammadpour
S. M. Mirkazemi
A. Beitollahi
In the present study, the feasibility of α-Fe ferromagnetic phase formation in glass and glass-ceramic by
reduction in hydrogen atmosphere have been investigated. The glass with the composition of ۳۵Na
۲
O–۲۴Fe۲O۳–۲۰B
۲O۳
–
۲۰SiO
۲
–۱ZnO (mol %) was melted and quenched by using a twin roller technique. As quenched glass flakes were heat
treated in the range of ۴۰۰-۶۷۵ °C for ۱-۲ h in hydrogen atmosphere, which resulted in reduction of iron cations to α-Fe
and FeO. The reduction of iron cations in glass was not completely occurred. Saturation magnetization of these samples
was ۸-۳۷ emu g -۱
. For the formation of glass ceramic, As quenched glass flakes heat treated at ۵۹۰ °C for ۱ h. Heat
treatment of glass ceramic containing magnetite at ۶۷۵°C in hydrogen atmosphere for ۱ h led to reduction of almost all of
the iron cations to α-Fe. Saturation magnetization of this sample increased from ۱۹.۸ emu g
-۱
for glass ceramic to ۶۷ emu
g
-۱
کلمات کلیدی: Magnetite, α-Fe, Reduction, Glass, Glass Ceramic, Magnetic Composite
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/1723159/