摘要
移动通讯技术的迅猛发展促进了微波陶瓷技术的进步,Ba(Co_(1/3)Nb_(2/3))O_3基复合钙钛矿微波陶瓷得到了广泛关注。以Ba(Co_(1/3)Nb_(2/3))O_3为基体材料,通过掺入Mn替代少部分高温易挥发的Co,XRD和Raman结果表明,掺入Mn可显著地提高Ba(Co_(1/3)Nb_(2/3))O_3陶瓷B位阳离子的1∶2有序度,进而提高其微波性能。且随着掺入量的增大,有序度呈现先增后减的趋势,最高为~36%。当Mn掺杂量(x)为0.015时,Ba[(C_(o0.985)Mn_(0.015))_(1/3)Nb_(2/3)]O_3陶瓷在1380℃烧结6 h可获得最佳微波性能:ε_r=31.18,Q×f=31779 GHz,τ_f=-2.35 ppm/℃。
The rapid development of mobile communication technology has promoted the development of microwave ceramic technology.Ba(Co_(1/3)Nb_(2/3))O_3-based composite perovskite microwave ceramics has attracted much attention.In this paper,with Ba(Co_(1/3)Nb_(2/3))O_3 as the matrix material,Mn was instead of a small part of Co.XRD and Raman results show that the doping of Mn can significantly improve the B-site cations by 1∶2 ordering degree of Ba(Co_(1/3)Nb_(2/3))O_3 ceramics,and then improve the microwave properties.With the increase of the amount of doping,the ordering degree increases first and then decreases up to~36%.Ba[(Co_(0.985)Mn_(0.015))_(1/3)Nb_(2/3)]O_3 ceramics sintered at 1380℃for 6h obtained the best microwave properties when the doping of Mn was 0.015:ε_r=31.18,Q·f=31779 GHz,τ_f=-2.35 ppm/℃.
引文
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