| Ba_(0.2)Sr_(0.8)La_4Ti_4O_(15)微波介电陶瓷的两步烧结法制备及性能表征 |
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| 引用本文： | 王娅,张树人,周晓华. Ba_(0.2)Sr_(0.8)La_4Ti_4O_(15)微波介电陶瓷的两步烧结法制备及性能表征[J]. 电子元件与材料, 2013, 32(1): 10-13 |
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| 作者姓名： | 王娅 张树人 周晓华 |
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| 作者单位： | 电子科技大学电子薄膜与集成器件国家重点实验室,四川 成都,610054 |
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| 基金项目： | 国际科技合作资助项目(No.0102010DFB13800) |
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| 摘 要： | 采用两步烧结法制备了Ba0.2Sr0.8La4Ti4O15微波介电陶瓷,并通过分析陶瓷的晶相、显微结构及介电性能,与采用传统高温直接烧结法制得的陶瓷样品进行了对比。结果表明,较之高温直接烧结法,采用两步烧结法可通过较长时间保温而制备出粒度小而均匀、无裂纹且介电性能较好的陶瓷。在一次烧结温度为1 600℃、二次烧结温度为1 500℃并保温10 h条件下所制陶瓷介电性能最优:εr=46.52,Q.f=65 496 GHz,τf=–12.1×10–6/℃。
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| 关 键 词： | 微波陶瓷 Ba0.2Sr0.8La4Ti4O15 两步烧结 介电性能 |
Property study of Ba0.2Sr0.8La4Ti4O15 microwave dielectric ceramics prepared by two-step sintering |
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| WANG Ya,ZHANG Shuren,ZHOU Xiaohua. Property study of Ba0.2Sr0.8La4Ti4O15 microwave dielectric ceramics prepared by two-step sintering[J]. Electronic Components & Materials, 2013, 32(1): 10-13 |
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| Authors: | WANG Ya ZHANG Shuren ZHOU Xiaohua |
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| Affiliation: | (University of Electronic Science and Technology of China,Chengdu 610054,China) |
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| Abstract: | Ba0.2Sr0.8La4Ti4O15 microwave dielectric ceramics were prepared using a two-step sintering method,and compared with the samples prepared using the conventional single-step sintering method by characterizing the crystal phase,microstructure and microwave dielectric properties of the ceramics.The results indicate that the Ba0.2Sr0.8La4Ti4O15 ceramics prepared by two-step sintering is composed of fine grains with uniform size,caused by long term temperature maintaining,and shows no crack and better dielectric properties in comparison to the samples prepared by single-step sintering.When the first-step sintering temperature is 1 600 ℃ and the second-step sintering temperature is 1 500 ℃ and maintained for 10 h,the prepared ceramics sample shows the best dielectric performance: εr = 46.5,Q?f = 65 496 GHz,τf = –12.1×10–6 /℃. |
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| Keywords: | microwave ceramics Ba0.2Sr0.8La4Ti4O15 two-step sintering dielectric properties |
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