研究了用改进的聚丙烯酰胺凝胶法制备BaNd2Ti4O12微波介质陶瓷超细粉.在弱碱性条件下(pH≈7.0～8.0,以EDTA为络合剂,将Ba2+、Sm3+、Ti4+溶解于含有丙烯酰胺单体、引发剂偶氮二异丁腈、交联剂n,n'-亚甲基丙烯酰胺的水溶液中,得到了稳定的溶胶体系,在100℃左右引发该体系聚合为高分子凝胶.干燥后,于1000℃煅烧2 h,得到结晶的BaNd2Ti4O12陶瓷粉体.X射线衍射分析表明,基本为纯相BaNd2Ti4O12,未见第2相析出;用热重-差热(TG-DTA)分析了凝胶的热解过程.用透射电镜观察了粉体的形貌,二次粒子呈球形,粒径约为50 nm左右.
参考文献
| [1] | Kolar D et al.[J].Solid-state chemistry,1981,38(01):58. |
| [2] | Laffez P.;Raveau B.;Desgardin G. .MICROWAVE DIELECTRIC PROPERTIES OF DOPED BA-6-X(SM1-Y'NDY)(8+2X/3)TI18O54 OXIDES[J].Journal of Materials Science,1995(1):267-273. |
| [3] | Wakino K et al.[J].Journal of the American Ceramic Society,1984,67(03):278. |
| [4] | Wang F et al.[J].Journal of Sol-Gel Science and Technology,2002,23(01):39. |
| [5] | Choy JH.;Hwang SH.;Byeon SH.;Demazeau G.;Han YS. .Citrate route to Sn-doped BaTi4O9 with microwave dielectric properties[J].Journal of the American Ceramic Society,1998(12):3197-3204. |
| [6] | Choy JH.;Sohn JH.;Itoh M.;Han YS. .MICROWAVE CHARACTERISTICS OF BAO-TIO2 CERAMICS PREPARED VIA A CITRATE ROUTE[J].Journal of the American Ceramic Society,1995(5):1169-1172. |
| [7] | Keiichii K et al.[J].Journal of Materials Science,1999,34(04):301. |
| [8] | Yebin X et al.[J].Journal of the American Ceramic Society,2000,89(07):2893. |
| [9] | Seabra M P et al.[J].Materials Research Bulletin,2002,37(03):255. |
| [10] | Seabra M P et al.[J].Journal of the European Ceramic Society,2004,58(24):2995. |
| [11] | Andre Douy et al.[J].International Journal of Inorganic Materials,2001,3(09):699. |
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%