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	Preparation and characterization of CaTiO3-(Li1/2Nd1/4Sm1/4)TiO3 microwave ceramics by a sol-gel combustion process
	Yue, Z ; Zhang, Y ; Gui, Z ; Li, L
	2010-05-10 ; 2010-05-10
关键词	DIELECTRIC-PROPERTIES AUTO-COMBUSTION CRYSTAL-STRUCTURE POWDER SYSTEM Materials Science, Multidisciplinary Physics, Applied
中文摘要	A novel sol - gel combustion process was adopted to synthesize reactive ceramic powder with composition of 0.25 CaTiO3 - 0.75 (Li1/2Nd1/4Sm1/4) TiO3, and microwave dielectric ceramics were prepared at different sintering temperatures using the synthesized powder. The combustion behavior of citrate gel and the sintering feature of the synthesized powder were evaluated by using differential thermal analysis - thermogravimetric analysis and thermo-mechanical analysis techniques, respectively. The citrate gel exhibits a self-propagating behavior after being ignited in air at room temperature. The as-burnt powder is so highly reactive that it can be transformed into single-phase perovskite at 900 degrees C and it can be sintered at 1100 degrees C. The effects of sintering temperature on the density, microstructure, and dielectric properties of the sintered ceramics were investigated. The maximum values of density, dielectric constant, and Q x f were achieved after sintering at 1200 degrees C. At 1200 degrees C, very dense ceramics with uniform grains and good dielectric properties with a dielectric constant of 123.8, a Q x f value of 5110 (at 3.7 GHz), and a tau(f) value of + 12.5 ppm/degrees C were achieved via the sol - gel combustion route.
语种	英语 ; 英语
出版者	SPRINGER ; NEW YORK ; 233 SPRING STREET, NEW YORK, NY 10013 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/21208]
专题	清华大学
推荐引用方式 GB/T 7714	Yue, Z,Zhang, Y,Gui, Z,et al. Preparation and characterization of CaTiO3-(Li1/2Nd1/4Sm1/4)TiO3 microwave ceramics by a sol-gel combustion process[J],2010, 2010.
APA	Yue, Z,Zhang, Y,Gui, Z,&Li, L.(2010).Preparation and characterization of CaTiO3-(Li1/2Nd1/4Sm1/4)TiO3 microwave ceramics by a sol-gel combustion process..
MLA	Yue, Z,et al."Preparation and characterization of CaTiO3-(Li1/2Nd1/4Sm1/4)TiO3 microwave ceramics by a sol-gel combustion process".(2010).

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