Ba3La2Ti2Ta2O15:A New Microwave Dielectricof A5B4O15-type Cation-deficient Perovskites
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2008年第3期
论文作者：胡长征
文章页码：422 - 424
摘 要：The synthesis,structure and properties of a new A 5B 4O 15-type cation-deficient perovskite Ba 3 La 2 Ti 2 Ta 2 O 15 were discribed.The compound was prepared by the conventional solid-state reaction route. The phase and structure of the ceramics were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）.The results reveal that the compound is successfully synthesized.The compound crystallizes in the trigonal system with unit cell parameter a=5.6730（2）,c=11.6511（2）,V=324.93（1）3 and Z=1. The microwave dielectric properties of the ceramic are studied using a network analyzer,and it shows a high dielectric constant of 45.1,a high quality factors with Q×f of 21 029 GHz,and a positiveτ f of 5.3 ppm℃-1.
胡长征
摘 要：The synthesis,structure and properties of a new A 5B 4O 15-type cation-deficient perovskite Ba 3 La 2 Ti 2 Ta 2 O 15 were discribed.The compound was prepared by the conventional solid-state reaction route. The phase and structure of the ceramics were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）.The results reveal that the compound is successfully synthesized.The compound crystallizes in the trigonal system with unit cell parameter a=5.6730（2）,c=11.6511（2）,V=324.93（1）3 and Z=1. The microwave dielectric properties of the ceramic are studied using a network analyzer,and it shows a high dielectric constant of 45.1,a high quality factors with Q×f of 21 029 GHz,and a positiveτ f of 5.3 ppm℃-1.
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