| 高频电介质新材料Ba_2Ti_3Nb_4O_(18)陶瓷 |
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| 引用本文： | 童盛,凌志远,郭栋,胡星.高频电介质新材料Ba_2Ti_3Nb_4O_(18)陶瓷[J].电子元件与材料,2007,26(7):42-45. |
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| 作者姓名： | 童盛 凌志远 郭栋 胡星 |
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| 作者单位： | 华南理工大学材料学院电子材料系,特种功能材料教育部重点实验室,广东,广州,510640 |
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| 摘 要： | 采用氧化物固相反应法制备了理论密度达96.8%以上的Ba2Ti3Nb4O18高频电介质陶瓷。XRD和SEM分析表明:该陶瓷为两相混合结构,主晶相为单斜Ba2Ti3Nb4O18相,次晶相为六方Ba3Ti4Nb4O21相。1250℃/2h烧结瓷体Ba3Ti4Nb4O21相的体积分数为5%~8%,1MHz下的介电性能为:εr约为38,tanδ约为1.6×10–4,αC约为–8.51×10–6/℃。
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| 关 键 词： | 无机非金属材料 高频电介质陶瓷 Ba2Ti3Nb4O18 介电特性 |
| 文章编号： | 1001-2028（2007）07-0042-04 |
| 修稿时间： | 2007-03-23 |
New high-frequency dielectric material Ba2Ti3Nb4O18 ceramic |
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| TONG Sheng,LING Zhi-yuan,GUO Dong,HU Xing.New high-frequency dielectric material Ba2Ti3Nb4O18 ceramic[J].Electronic Components & Materials,2007,26(7):42-45. |
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| Authors: | TONG Sheng LING Zhi-yuan GUO Dong HU Xing |
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| Abstract: | Ba2Ti3Nb4O18 high frequency dielectric ceramics with >96.8 % theoretical density were prepared by the conventional oxides solid-state reaction method. The XRD patterns and SEM analysis indicate that Ba2Ti3Nb4O18 ceramic is a diphasic mixture, monoclinic Ba2Ti3Nb4O18 is the major phase, hexagonal Ba3Ti4Nb4O21 is the minor phase. In Ba2Ti3Nb4O18 ceramic sintered at 1 250 ℃ for 2h, the volume percent content of Ba3Ti4Nb4O21 was 5 % ～ 8 %, the dielectric properties measured at 1MHz were: εr is about equal to 38, tanδ is about equal to 1.6×10–4 and αC is about equal to – 8.51×10–6/℃. |
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| Keywords: | non-metallic inorganic material high frequency dielectric ceramic Ba2Ti3Nb4O18 dielectric properties |
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