کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1623730 | 1516409 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of Nd/Sm ratio and glass addition on the microwave dielectric properties of Ba4.5(Sm(0.8âx)NdxBi0.2)9Ti18O54 ceramics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
In this study, Ba4.5(Sm(0.8âx)NdxBi0.2)9Ti18O54 ceramics with various amounts of glass were prepared. The effects of Nd/Sm ratio and glass content on the microstructure evolution and microwave dielectric properties were evaluated. SEM micrographs revealed that the microstructures of Ba4.5(Sm(0.8âx)NdxBi0.2)9Ti18O54 ceramics with 4 wt.% glass sintered at 1150 °C are uniform and their grain sizes range from 1 to 3 μm. The dielectric constant of Ba4.5(Sm(0.8âx)NdxBi0.2)9Ti18O54 ceramics increased with increasing sintering temperature or the Nd content, and the Ïf value also increases with increasing Nd content. With 6-10 wt.% glass added, Ba4.5(Sm0.24Nd0.56Bi0.2)9Ti18O54 ceramics obtain maximum densities at 1100 °C. No second phase was detected in the XRD patterns. Grains are columnar-like and grain size increases significantly with increasing glass content and sintering temperature. The results showed that Ba4.5(Sm0.24Nd0.56Bi0.2)9Ti18O54 ceramics with 2 wt.% glass sintered at 1150 °C had a sintering density of 5.6 g/cm3, dielectric constant of 87.9, Q·f of 2523 GHz, and Ïf of 22.8 ppm/°C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 468, Issues 1â2, 22 January 2009, Pages 522-527
Journal: Journal of Alloys and Compounds - Volume 468, Issues 1â2, 22 January 2009, Pages 522-527
نویسندگان
Yu-Chuan Wu, Sea-Fue Wang, Yuh-Ruey Wang, Wen-Jung Wu,