本文采用熔盐法,利用氯化钾作助熔剂成功合成了Bi3NbTiO9多晶粉体.并在此基础上,利用经典的动力学方程系统研究了Bi3NbTiO9多晶粉体在熔盐合成过程中的晶粒生长动力学.结果表明:利用熔盐方法合成Bi3NbTiO9多晶粉体的生长过程,可以划分为高温和低温两个阶段,并且在不同的阶段存在不同的生长机制.进一步对熔盐法合成多晶陶瓷粉体的形核和长大两个反应阶段进行研究,结果表明:粉体的形核过程遵循JMAK方程.低温阶段即低于900℃时,Bi3NbTiO9晶粒的长大速率较小,生长主要依赖于扩散；900℃以后晶粒的长大速率和晶粒生长激活能均显著增加,生长主要依赖于界面反应；高温生长的后期会发生明显的异常晶粒长大.
参考文献
| [1] | Low temperature molten salt synthesis of SrTiO_3 submicron crystallites and nanocrystals in the eutectic NaCl-KCl[J].Materials Letters,2010(3):431. |
| [2] | Zongying Cai;Xianran Xing;Lu Li .Molten salt synthesis of lead lanthanum zirconate titanate ceramic powders[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2008(1/2):466-470. |
| [3] | Z. Yang;Y. Chang;X. Zong .Preparation and properties of PZT-PMN-PMS ceramics by molten salt synthesis[J].Materials Letters,2005(22):2790-2793. |
| [4] | Digamber G. Porob;Paul A. Maggard .Synthesis of textured Bi_5Ti_3FeO_(15) and LaBi_4Ti_3FeO_(15) ferroelectric layered Aurivillius phases by molten-salt flux methods[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2006(8):1513-1519. |
| [5] | 李宝让,曹斌.熔盐用量对Bi3NbTiO9粉体合成的影响[J].人工晶体学报,2010(06):1479-1484. |
| [6] | 廖润华,李月明,王进松,李润润,刘虎,杜洁.两步熔盐法制备片状NaNbO3晶体[J].人工晶体学报,2010(05):1216-1220. |
| [7] | Haixue Yan;Hongtao Zhang;Zhen Zhang .B-site donor and acceptor doped Aurivillius phase Bi_3NbTiO_9 ceramics[J].Journal of the European Ceramic Society,2006(13):2785-2792. |
| [8] | Malek J;Svadlak D;Mitsuhashi T;Haneda H .Kinetics of crystal growth of Sb2S3 in (GeS2)(0.3)(Sb2S3)(0.7) glass[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2006(21/22):2243-2253. |
| [9] | 刘春静,王新,魏雨,姜延飞,杨玉.软磁锰锌铁氧体的晶粒生长动力学实验分析[J].稀有金属材料与工程,2009(z1):515-519. |
| [10] | Francesca Bortolani;Robert A. Dorey .Molten salt synthesis of PZT powder for direct write inks[J].Journal of the European Ceramic Society,2010(10):2073-2079. |
| [11] | Lu C H;Chen Y C .Sintering and Decomposition of Ferroelectric Layered Perovskites:Strontium Bismuth Tantalate Ceramics[J].Journal of the European Ceramic Society,1999,19:2909-2914. |
| [12] | 刘峰,刘欢欢,马亚珠.固态相变的动力学描述[J].西安工业大学学报,2010(02):143-149. |
| [13] | Liao S C;Mayo W E;Pae K D .Theory of High Pressure/Low Temperature Sintering of Bulk Nano-Crystalline TiO2[J].Acta Materialia,1997,45(10):4027-4040. |
| [14] | Lee KH;Yoon JK;Lee JK;Doh JM;Hong KT;Yoon WY .Growth kinetics of W5Si3 layer in WSi2/W SYSteM[J].Surface & Coatings Technology,2004(2/3):146-153. |
| [15] | Rios P R;Yamamoto T;Kondo T et al.Abnormal Grin Growth Kinetics of BaTiO3 with An Excess TiO2[J].Acta Materialia,1998,46(05):1617-1623. |
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%