کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1465338 989688 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Toughening macroporous alumina membrane supports with YSZ powders
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Toughening macroporous alumina membrane supports with YSZ powders
چکیده انگلیسی

Macroporous alumina is an important support in membrane fields because of its stabilities to withstand exposure to high temperature, harsh chemical environment and high mechanical strength. However, the essence of brittleness can greatly shorten the life span and restrict the application fields. In this paper, YSZ (ZrO2 stabilized by 3 mol% Y2O3) powders were added into alumina powders to improve the fracture toughness of macroporous Al2O3 supports sintered at 1400 °C and 1600 °C. The results show that the fracture toughness and the corresponding bending strength of supports are simultaneously greatly influenced by various YSZ contents. When YSZ content is 6 wt%, the maximum value of the fracture toughness is 3.0 MPa·m1/2, and the bending strength is up to 90 MPa. By SEM and XRD analysis, the phase transformation of the uniform distribution t-ZrO2 into m-ZrO2 is the main cause which improves the fracture toughness of macroporous Al2O3 supports. Lowering of the sintering temperature by adding YSZ additives is also discovered here. The fracture toughness of the supports sintered at 1400 °C by adding YSZ powder is higher than that of the supports sintered at 1600 °C without adding any additives.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 35, Issue 4, May 2009, Pages 1641–1646
نویسندگان
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