کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1654197 1007684 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Studies on the (Mg,Zn)TiO3-CaTiO3 microwave dielectric ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Studies on the (Mg,Zn)TiO3-CaTiO3 microwave dielectric ceramics
چکیده انگلیسی

In this paper, the microwave dielectric characteristics and microstructures of (1 − x)(Mg1 − y,Zny)TiO3–xCaTiO3 (x = 0.07 ∼ 0.11, y = 0.2 ∼ 0.4) ceramic system were studied. The replacement of Mg2 + ion with Zn2 + ion increases the dielectric constant and quality factor. The phase composition of the system changes from Mg2TiO4 to MgTiO3 during the sintering, which improves the dielectric properties. CaTiO3 increases the dielectric constant, reduce the loss and also compensate the temperature coefficient of (Mg,Zn)TiO3. The existing area of the different compositions in the ceramics was observed by means of energy dispersive spectroscopy, which reveals that CaTiO3 coexists with (Mg,Zn)TiO3 in minor crystal grain. And the existing of CaTiO3 phase can inhibit abnormal grain growth of the phase of (Mg,Zn)TiO3. A dielectric constant ɛr of 22.5, a Q × f value of 86,000 (at 7.5 GHz) and a τf value of + 3 ppm/°C were obtained for 0.91(Mg0.7,Zn0.3)TiO3–0.09CaTiO3 ceramics sintered at 1310 °C for 3 h.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 59, Issue 18, August 2005, Pages 2337–2341
نویسندگان
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