کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10632117 | 992386 | 2005 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High temperature structural phase transitions in SrSnO3 perovskite
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Three high temperature structural phase transitions have been identified in the perovskite-structured phase SrSnO3 using differential scanning calorimetry and dilatometry, and have subsequently been structurally characterised using high-resolution neutron powder diffraction. Between 298 and 905 K, SrSnO3 is orthorhombic, space group Pmcn before undergoing a continuous phase transition to a second orthorhombic phase in space group Incn. At 1062 K there is a first order phase transition to a tetragonal phase in space group I4/mcm before finally transforming to the aristotype phase at 1295 K. Using the magnitude of the anti-phase tilt as a measure of the order parameter for the transition from I4/mcm to Pm3¯m suggests this transition is tricritical in nature. Crystal structures are reported for the three hettotype phases.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 40, Issue 3, 8 March 2005, Pages 507-520
Journal: Materials Research Bulletin - Volume 40, Issue 3, 8 March 2005, Pages 507-520
نویسندگان
Marianne Glerup, Kevin S. Knight, Finn Willy Poulsen,