کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1477715 991196 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of nanosized zirconium carbide by a sol–gel route
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Synthesis of nanosized zirconium carbide by a sol–gel route
چکیده انگلیسی

Nanosized zirconium carbide was synthesized by a new simple sol–gel method using zirconium n-propoxide, acetic acid as chemical modifier, and saccharose as carbon source. When heat-treated at 900 °C under flowing argon, gels transformed into intimately mixed amorphous carbon and nanosized tetragonal ZrO2. Further heat treatments above 1200 °C led to the formation of zirconium carbide with some dissolved oxygen in the lattice. Oxygen content could be reduced by increasing the heat treatment temperature from 1400 to 1600 °C, which unfortunately also induced a mean crystallites size increase from 90 to 150 nm. Short heat treatments above 1600 °C were carried out to further purify the samples and to limit the particles growth. A compromise between purity and average crystallite's size could then be found. Powders were assessed using X-ray diffraction, thermal analysis and scanning electron microscopy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 27, Issue 4, 2007, Pages 2061–2067
نویسندگان
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