کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10629759 991160 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sintering and characterization of flyash-based mullite with MgO addition
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Sintering and characterization of flyash-based mullite with MgO addition
چکیده انگلیسی
Mullite ceramics were fabricated at relatively low sintering temperatures (1500-1550 °C) from recycled flyash and bauxite with MgO addition as raw materials. The densification behavior was investigated as function of magnesia content and sintering temperature. The results of thermal analysis, bulk density and pore structure indicate that MgO addition effectively promoted sintering, especially above 1450 °C. Due to the presence of large interlocked elongated mullite crystals above 1450 °C, associated with enhanced densification, an improvement in mechanical strength was obtained for the samples containing magnesia. The addition of magnesia slightly decreases the LTEC at 1300 °C due to the formation of low-expansion α-cordierite, but slightly increases the LTEC above 1400 °C due to the formation of high expansion corundum and MgAl2O4 spinel.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 31, Issue 5, May 2011, Pages 687-695
نویسندگان
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