| 颗粒包覆法制备BZT-CT复合陶瓷 |
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| 引用本文： | 董一鸣,沈波,张良莹,姚熹.颗粒包覆法制备BZT-CT复合陶瓷[J].电子元件与材料,2006,25(2):38-40. |
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| 作者姓名： | 董一鸣 沈波 张良莹 姚熹 |
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| 作者单位： | 同济大学功能材料研究所,上海,200092 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);上海市重点学科建设项目 |
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| 摘 要： | 采用预合成的方法,分别用得到的单斜类锆钙钛矿相Bi2(Zn1/3Ta2/3)2O7(β-BZT)和钙钛矿相CaTiO3(CT)的粉末作为正负温度系数组元,用sol-gel法制备的ZnO-B2O3-SiO2玻璃,包覆两组元颗粒以阻止其相互反应,从而制备复相零温度系数微波陶瓷。结果表明:预合成及颗粒包覆法可抑制两相固溶反应,有效降低复相陶瓷的烧结温度,调节温度系数。特别是900℃烧结的w(CT)为4%的样品,其εr约为47,αε为2.8×10–6℃–1。
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| 关 键 词： | 无机非金属材料 Bi_2O_3-ZnO-Ta_2O_5系陶瓷 复相陶瓷 玻璃包覆 微波介电性能 |
| 文章编号： | 1001-2028（2006）02-0038-03 |
| 收稿时间： | 2005-08-22 |
| 修稿时间： | 2005-08-22 |
BZT-CT Composite Ceramics Prepared by Particle-coating Method |
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| DONG Yi-ming,SHEN Bo,ZHANG Liang-ying,YAO Xi.BZT-CT Composite Ceramics Prepared by Particle-coating Method[J].Electronic Components & Materials,2006,25(2):38-40. |
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| Authors: | DONG Yi-ming SHEN Bo ZHANG Liang-ying YAO Xi |
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| Abstract: | Powders of Bi2(Zn1/3Ta2/3)2O7(β-BZT) and CaTiO3(CT) were chosen as positive and negative temperature coefficient constituents.A sol-gel particle-coating technique was developed to form a thin ZnO-B2O3-SiO2 glass layer on the surface of BZT and CT powder.The results show that presynthesizing method and particle-coating method are effective to suppress the reaction between the two constituents,reduce the sintering temperature and adjust temperature coefficient.Typically,when w(CT)= 4% and the sample is sintered at 900℃,the εr and αε of obtained sample are 47 and 2.8×10–6℃–1 respectively. |
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| Keywords: | inorganic non-metallic materials Bi2O3-ZnO-Ta2O5-based ceramics composite ceramics glass coating microwave dielectric properties |
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