کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1501276 993376 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Formation of ε-Fe2O3 phase by the heat treatment of α-Fe2O3/SiO2 nanocomposite
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Formation of ε-Fe2O3 phase by the heat treatment of α-Fe2O3/SiO2 nanocomposite
چکیده انگلیسی

Starting from a nanocomposite consisting of 4 nm hematite nanoparticles embedded in a silica matrix (30 wt.% hematite) and by applying heat treatments at increasing temperatures up to 1050 °C, gradual formation of ε-Fe2O3 phase was obtained. Besides representing a new synthesis route of ε-Fe2O3 phase, the results obtained in this work indicate that under certain conditions hematite nanoparticles are not thermally stable. Hence, like other ferric oxide polymorphs, nanosized hematite can undergo thermally triggered, size-induced structural phase transitions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Scripta Materialia - Volume 58, Issue 8, April 2008, Pages 703–706
نویسندگان
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