کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1461802 989623 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High temperature monoclinic-to-tetragonal phase transition in magnesium doped lanthanum ortho-niobate
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
High temperature monoclinic-to-tetragonal phase transition in magnesium doped lanthanum ortho-niobate
چکیده انگلیسی

Magnesium doped lanthanum ortho-niobate (La0.98Mg0.02NbO4) was prepared by the molten salt synthesis method. X-ray diffraction and dilatometry methods were used to study high temperature behavior of the ceramic material. Special attention was paid to the phase transition between the monoclinic and tetragonal phases. The values of spontaneous strain on the basis of unit cell parameter, obtained by Rietveld refinement, have been calculated as well as Landau order parameter. The thermal expansion coefficient (TEC) of La0.98Mg0.02NbO4 was determined to be 12×10−6 1/K and 8×10−6 1/K below and above 500 °C, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 39, Issue 4, May 2013, Pages 4239–4244
نویسندگان
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