کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5438095 1398180 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Temperature induced gelation of non-aqueous alumina suspension using oleic acid as dispersant
ترجمه فارسی عنوان
درجه حرارت ناشی از تعلیق آلومینای غیر آبی با استفاده از اسید اولئیک به عنوان پراکنده
کلمات کلیدی
درجه حرارت ناشی از ژلاتینه، تعلیق آلومینا غیر آبی، اسید اولئیک، حذف پراکنده، نقطه ذوب،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
A novel temperature induced gelation method for alumina suspension using oleic acid as dispersant is reported. Non-aqueous suspension with high solid loading and low viscosity is prepared using normal octane as solvent. Influence of oleic acid on the dispersion of suspension was investigated. There was a well disperse alumina suspension with 1.3 wt% oleic acid. Influence of gelation temperature on the coagulation process and properties of green body was investigated. The sufficiently high viscosity to coagulate the suspension was achieved at −20 °C. The gelation temperature was controlled between the melting point of dispersant and solvent. The gelation mechanism is proposed that alumina suspension is destabilized by dispersant separating out from the solvent and removing from the alumina particles surface. The alumina green body with wet compressive strength of 1.07 MPa can be demolded without deformation by treating 53 vol% alumina suspension at −20 °C for 12 h. After being sintered at 1550 °C for 3 h, dense alumina ceramics with relative density of 98.62% and flexural strength of 371±25 MPa have been obtained by this method.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 14, 1 October 2017, Pages 11361-11366
نویسندگان
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