کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1653027 1007653 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, morphology and color tone properties of the lanthanum substituted hematite
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Synthesis, morphology and color tone properties of the lanthanum substituted hematite
چکیده انگلیسی

The polymeric complex method has been employed to investigate the effects of substitution by lanthanum into hematite powder on structures, morphology and color tone properties. X-ray diffraction measurements evidenced the existence of Fe2 − xLaxO3 at 1000 °C–1200 °C by shifting peaks to lower angles. At higher temperature, lattice parameters and cell volume were found to expand due to the incorporation of La3+ ion into the hematite in the range 301.98–303.87 Å3. Crystalline size decreased when increasing the amount of La3+ ion in the reaction process. Suppression of particle growth was observed by the Field Emission Scanning Electron Microscopy studies at higher temperatures. Brighter yellowish-red color than that of pure hematite was obtained and it grew into deeper color tone rapidly by increasing the amount of La3+ ion into the hematite.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 61, Issue 17, July 2007, Pages 3774–3777
نویسندگان
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