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期刊论文
New Microwave Dielectric Ceramics BaLn2(MoO4)4 (Ln = Nd and Sm) with Low Loss
Journal of the American Ceramic Society,-0001,():
In the present work, a pure monoclinic phase of BaNd2(MoO4)4 and BaSm2(MoO4)4 was formed at 850°C and 600°C, respec- tively, via a solid-state reaction method. The ceramic samples were found to be well densified at 960°C. Dense and homo- geneous microstructures were revealed from the scanning electron microscopy. The microwave dielectric behaviors were studied as a function of sintering temperature and characterized in the temperature range 25°C–120°C. The best properties were obtained in ceramics sintered at 960°C with a permittivity ~11.7, a Q 3 f value of 45 000 GHz and a temperature coeffi- cient of frequency about 41 ppm/°C for BaNd2(MoO4)4 cera- mic at 9.9 GHz, and a permittivity ~11.8, a Q 3 f value of 20 000 GHz, and a temperature coefficient of frequency about 34 ppm/°C for BaSm2(MoO4)4 ceramic at 9.7 GHz, respec- tively.
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