کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1493084 | 992465 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Particle production and anatase formation in amorphous particles at in-droplet hydrolysis of titanium alkoxide
ترجمه فارسی عنوان
تولید ذرات و تشکیل آناتاز در ذرات غیر آلی در هیدرولیز قطره ای از آلکوکید تیتانیوم
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
Anatase crystallization in amorphous particles was investigated during droplet-to-particle synthesis of titania. Ethanolic solution of carboxylic acid-modified titanium tetrabutoxide precursor, including water, was dispersed and conveyed to a tube flow reactor at 350-600°C. The formed submicron-sized particles were characterized by aerosol measurements, X-ray diffraction, and electron microscopy. An aerosol number mode was observed at particle diameter of 250 nm representing the particles formed of droplet drying. Additional ultrafine particles were formed in air atmosphere at 450°C and in nitrogen at 600°C from decomposition and outgassing of precursor species and a subsequent particle formation. An anatase crystalline phase was observed in the particles produced at 500°C in nitrogen. The location of anatase formation was investigated by TEM from thinned sections of the particles. The crystals were observed near the surfaces and indicating columnar growth.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 36, Issue 11, 15 September 2001, Pages 2017-2025
Journal: Materials Research Bulletin - Volume 36, Issue 11, 15 September 2001, Pages 2017-2025
نویسندگان
P.P. Ahonen, O. Richard, E.I. Kauppinen,