کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10377967 | 880747 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ceramic nanomaterials from aqueous and 1,2-ethanediol supersaturated solutions at high temperature
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The aim of this study was the synthesis and physicochemical characterization of some nanosized hydroxides/oxides interesting in the field of ceramic materials with the aim of developing new materials for technological applications in the field of high-performance coatings. In particular, attention was focused on ZrO2â
nH2O, ZrO2, Zn(OH)2, ZnO, Al2O3â
nH2O, and Al2O3. The synthesis was carried out in 1,2-ethanediol at 150-160â°C or in water at 90â°C at a high degree of supersaturation in order to achieved nucleation rate much greater than the growth rate. The obtained ZrO2â
nH2O, Zn(OH)2, and Al2O3â
nH2O particles were peptized to eliminate possible agglomeration and then calcinated at a suitable temperature to allow the formation of the corresponding anhydrous oxides. The synthesized particles were characterized by scanning and transmission electron microscopy, X-ray diffractometry, and differential thermal analysis coupled with thermogravimetry and Fourier transform infrared spectroscopy. The study showed that all the products can be obtained in the nanostructured crystalline form; ZrO2 presented the interesting feature of different tetragonal/monoclinic ratios depending on the solvent used for the synthesis. Preliminary results on the potentialities of these ZrO2 particles as agents for ultrahard coatings on ceramic surfaces were encouraging and very promising.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 286, Issue 2, 15 June 2005, Pages 543-550
Journal: Journal of Colloid and Interface Science - Volume 286, Issue 2, 15 June 2005, Pages 543-550
نویسندگان
Michelangelo Moroni, Daniele Borrini, Luca Calamai, Luigi Dei,