کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1486548 | 1510567 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A sol–gel route using propylene oxide as a gelation agent to synthesize spherical NiAl2O4 nanoparticles
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Spherical NiAl2O4 nanoparticles with large surface area were successfully synthesized by a sol–gel method using propylene oxide as a gelation agent. The formation process of the resulting nanoparticles is described and characterized by TG-DTA, XRD, BET and TEM. A pseudo-spinel structure was formed at 700 °C and a spinel NiAl2O4 structure was formed at 800 °C by the reaction of NiO at the surface of amorphous alumina particles. It was found that the presence of NiO or NiAl2O4 on the surface of the alumina retards the crystallization of amorphous alumina to γ-Al2O3. The obtained nanoparticles experienced the decrease of particle size from 700 to 800 °C accompanying the structure transformation from pseudo-spinel to NiAl2O4 spinel.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 351, Issues 24–26, 1 August 2005, Pages 2102–2106
Journal: Journal of Non-Crystalline Solids - Volume 351, Issues 24–26, 1 August 2005, Pages 2102–2106
نویسندگان
Hongtao Cui, Marcos Zayat, David Levy,