کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1476700 1510147 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microwave composite dielectrics based on magnesium titanates
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Microwave composite dielectrics based on magnesium titanates
چکیده انگلیسی

Composite dielectrics comprising the crystal phases of Co-doped magnesium titanates MgTiO3 and Mg2TiO4, and CaTiO3 were examined with regard to their phase composition and its effect on the microwave dielectric properties. In the case of MgTiO3-based composites an increase in the Co concentration results in increasing amount of an additional phase MgTi2O5, which significantly deteriorates the product Q × f. In contrast, the materials based on the spinel Mg2TiO4 never contain MgTi2O5, and consequently demonstrate excellent Q × f magnitude which is as high as 100,000 GHz at low Co doping. At higher Co concentration, however, an additional phase MgTiO3 appears in these materials that is accompanied by a slight reduction of the Q × f magnitude. A slight addition (5 wt.%) of the glass-forming zinc borate into the Mg2TiO4-based composite allows a noticeable reduction of its sintering temperature by 150–200 °C without a significant degradation of its dielectric properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 27, Issues 8–9, 2007, Pages 2963–2966
نویسندگان
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