| La-Nb双施主掺杂BaTiO_3陶瓷的研究 | |
| 王悦辉 ; 王婷 ; 石士考 ; 沈建红 ; 周济 ; WANG Yue-hui ; WANG Ting ; SHI Shi-kao ; SHEN Jian-hong ; ZHOU Ji | |
| 2010-06-10 ; 2010-06-10 | |
| 关键词 | La-Nb双施主掺杂介电性能 barium titanate lanthanum-niobium codoped dielectric properties TM28 |
| 其他题名 | Effect of Lanthanum-Niobium Codoped on Microstructure and Dielectric Properties of Barium Titanate Ceramics |
| 中文摘要 | 采用固相法进行La2O3和Nb2O5两种施主添加剂复合掺杂(Ba1-xLa2x/3)(Ti1-xNb4x/5)O3陶瓷改性研究.研究结果表明,La-Nb双施主掺杂(Ba1-xLa2x/3)(Ti1-xNb4x/5)O3陶瓷烧结体晶相为准立方相.当x=0.05时,陶瓷烧结体内存在Ba6Ti17O40富钛的第二相.当x>0.2时,Ba3La3Ti5Nb5O30固溶体作为第二相析出.随着La-Nb双施主掺杂剂掺量的增加,晶粒尺寸减小,介电常数下降,介电常数随温度变化率降低,表现明显的移峰、展峰作用.; The influence of Lanthanum-Niobium donor-dopants' concentrations on microstructure evolution and dielectric properties was investigated for the ceramics with compositions of (Ba_ 1-x La_ 2x/3 )(Ti_ 1-x Nb_ 4x/5 )O_ 3 ( 0.05 x 0.3 ). The samples were prepared by the solid-state reaction method. The crystal structures of solid solutions were pseudocubic for all samples.In the case of low donor-dopants' concentration, secondary titanium-rich phase occured. With the increase of donor-dopants' concentration, Ba_ 3 La_ 3 Ti_ 5 Nb_ 5 O_ 30 solid solutions became main secondary phases. Grains size decreased and the dielectric permittivity droped significantly with the increase of donor-dopants' concentrations.; 国家863计划(2003AA32G030); 973计划(2002CB613306) |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/61116]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 王悦辉,王婷,石士考,等. La-Nb双施主掺杂BaTiO_3陶瓷的研究[J],2010, 2010. |
| APA | 王悦辉.,王婷.,石士考.,沈建红.,周济.,...&ZHOU Ji.(2010).La-Nb双施主掺杂BaTiO_3陶瓷的研究.. |
| MLA | 王悦辉,et al."La-Nb双施主掺杂BaTiO_3陶瓷的研究".(2010). |
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