کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1477023 991169 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ho-doped BaTiO3: Polymorphism, phase equilibria and dielectric properties of BaTi1−xHoxO3−x/2: 0 ≤ x ≤ 0.17
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Ho-doped BaTiO3: Polymorphism, phase equilibria and dielectric properties of BaTi1−xHoxO3−x/2: 0 ≤ x ≤ 0.17
چکیده انگلیسی

An extensive range of Ho-doped BaTiO3 solid solution forms in which Ho substitutes for Ti with creation of oxygen vacancies. The effect of Ho substitution is to destabilise thermodynamically the high-temperature hexagonal polymorph of BaTiO3. Nevertheless, at high Ho contents, the hexagonal polymorph forms as a kinetically stable intermediate before transforming to the thermodynamically stable cubic polymorph; its formation represents an example of Ostwald's rule of successive reactions. Samples fired at ∼1400 °C and cooled in air are insulating and transform from ferroelectric to relaxor ferroelectric behaviour with increasing x.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 29, Issue 15, 1 December 2009, Pages 3249–3257
نویسندگان
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