کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1474652 991093 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of aluminum hydroxide (Al(OH)3) for use as a porogenic agent in castable ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Characterization of aluminum hydroxide (Al(OH)3) for use as a porogenic agent in castable ceramics
چکیده انگلیسی

Porous structures based on aluminum oxide-hydroxide (Al2O3-Al(OH)3) show high refractoriness. Regarding their use as thermal insulators, the preparation of aqueous castable suspensions requires suitable conditions to produce stable co-dispersions and a deeper knowledge on their porogenic-sintering behaviors. This study reports on the characterization of a commercial grade of Al(OH)3 and several transition phases of Al2O3 (attained through the calcination of Al(OH)3) aiming at their use as porogenic agents for castable porous ceramics. X-ray diffraction, thermogravimetry, Helium picnometer method, specific surface area and electron microscopy were used. The dispersion and rheology of Al(OH)3 and Al2O3 were investigated with pH variations and dispersants. Aluminum oxide and hydroxide particles showed high compatibility in aqueous medium and favored the preparation of suspensions. As porogenic agents, the transition phases showed a large quantity of meso-macro pores and a huge variation in the specific surface area, which highlight their potential to produce high refractoriness porous structures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 35, Issue 2, February 2015, Pages 803–812
نویسندگان
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