کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1653027 | 1007653 | 2007 | 4 صفحه PDF | دانلود رایگان |

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.
Journal: Materials Letters - Volume 61, Issue 17, July 2007, Pages 3774–3777