采用传统固相反应法,研究了Li2CO3掺杂对0.94Mg2SiO4-0.06Ca0.9Sr01TiO3微波介质陶瓷的烧结性能和介电性能的影响.结果表明,烧结助剂Li2 CO3的引入未改变陶瓷的相组成.添加适量的Li2CO3可以促进烧结,烧结温度由1440℃降低到1355℃,而且介电性能也得到了优化,Q ×f值有明显的提高;过量Li2CO3的引入,降低了材料的致密性,增加了陶瓷的介电损耗.在1355℃烧结,保温3h,添加0.50wt％ Li2 CO3的0.94Mg2SiO4-0.06Ca09Sr0.1TiO3陶瓷获得最佳的介电性能:εr=7.96,Q×f=96409 GHz(f=14.571 GHz),τf=+4.62 ppm/℃.
参考文献
| [1] | Cava RJ. .Dielectric materials for applications in microwave communications[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2001(1):54-62. |
| [2] | T. Fujii;A. Ando;Y. Sakabe .Characterization of dielectric properties of oxide materials in frequency range from GHz to THz[J].Journal of the European Ceramic Society,2006(10/11):1857-1860. |
| [3] | Tsutomu Tsunooka;Tomonori Sugiyama;Hitoshi Ohsato;Ken-ich Kakimoto;Minato Andou;Yutaka Higashida;Hirotsugu Sugiura .Development of Forsterite with High Q and Zero Temperature Coefficient τ_f for Millimeterwave Dielectric Ceramics[J].Key engineering materials,2004(269):199-202. |
| [4] | Gang Dou;Dongxiang Zhou;Mei Guo;Shuping Gong;Yunxiang Hu .Low-temperature sintered Mg_2SiO_4-CaTiO_3 ceramics with near-zero temperature coefficient of resonant frequency[J].Journal of Materials Science. Materials in Electronics,2013(5):1431-1438. |
| [5] | Siqin Meng;Zhenxing Yue;Hao Zhuang .Microwave Dielectric Properties of Ba_3(VO_4)_2-Mg_2SiO_4 Composite Ceramics[J].Journal of the American Ceramic Society,2010(2):359-361. |
| [6] | Song KX;Chen XM;Fan XC .Effects of Mg/Si ratio on microwave dielectric characteristics of forsterite ceramics[J].Journal of the American Ceramic Society,2007(6):1808-1811. |
| [7] | 徐明姐,黄春娥,沈春英,丘泰.Li2CO3对0.7CaTiO3-0.3SmAlO3陶瓷性能的影响[J].人工晶体学报,2014(05):1115-1120. |
| [8] | 马丹,慕玮,丘泰.B2O3掺杂对0.69CaTiO3-0.31LaAlO3微波介质陶瓷的性能影响[J].人工晶体学报,2013(07):1347-1352. |
| [9] | 林魁,朱永伟,李军,李茂,左敦稳.金刚石固结磨料研磨K9玻璃的研究[J].硅酸盐通报,2010(01):6-11. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%