کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1497329 993002 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and optical characterization of SrHfO3:Ce and SrZrO3:Ce nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Synthesis and optical characterization of SrHfO3:Ce and SrZrO3:Ce nanoparticles
چکیده انگلیسی

Nanoparticles have recently found application fields in various scopes, such as imaging (luminescent nanosensors), or for the production of laser or scintillating transparent ceramics. This work is related to this last field, with the target of medical imaging (positron emission tomography). Very dense rare earth doped mixed oxides were studied: SrZrO3:Ce and SrHfO3:Ce, which are particularly adapted to this application. The phase transformations and the very high melting points of these materials (respectively 2646 °C and 2730 °C) led us to study their synthesis as nanoparticles. Using the combustion method we have obtained, at temperatures less than 1000 °C, particles of very small dimensions (10–100 nm) without impurities. First characterization of the optical properties (under UV irradiation) of the cerium ion in these perovskite matrixes, realized on the nanopowders (absorption, emission and lifetime of the cerium ion), is presented here: for both compounds, an emission at 430 nm is observed under UV irradiation, with a short decay time; these particles prepared by combustion are thus interesting precursors for ceramic scintillators.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 30, Issue 7, March 2008, Pages 1109–1114
نویسندگان
, , , ,