研究了前驱物的浓度、预处理方式和配比对水热法制备钛酸铋粉体结构和形貌的影响.以Bi(NO_3)_3·5H_2O和TiCl_4为原料,KOH为矿化剂,在240～260℃水热反应4h,制备出Bi_4Ti_3O_(12)纳米粉体,借助XRD、TEM、SEM和FTIR分别对粉体的晶相、微观形貌和组成进行表征.结果表明,当前驱物浓度为0.10～0.15mol/L,Ti/Bi摩尔比值为0.75时,可获得单一物相组成的Bi_4Ti_3O_(12)粉体;用去离子水反复洗涤胶体沉淀前驱物,可防止Cr-1带来的不利影响;实验所得Bi_4Ti_3O_(12)晶粒是方形片状的,宽度尺寸在30nm左右,长度大于100nm.
Effects of concentration、pretreatment methods and starting ratio of precursors on crystal structure and morphology were analysed.Bi_4Ti_3O_(12) nanocrystalline particles were hydrothermally synthesized in the range of 240～260℃ for 4h,from Bi(NO_3)_3,5 H_2O、TiCl_4 and KOH solution.XRD、SEM、TEM and FTIR was used to characterise the powders.The results show that the pure Bi_4 Ti_3O_(12) powder can be obtained when the concentration of precursors is from 0.10mol/L to 0.15mol/L,and the ratio of Ti and Bi is 0.75.Washing the colloidal precursors with deionized water many times can avoid the contamination from Cl~- ions.TEM microphotograph shows that the bismuth titanate nanocrystals were tabular,and their short side length is about 30nm.long side length more than 100nm.
参考文献
| [1] | Szu Hwee Ng;Junmin Xue;John Wang .Bismuth titanate from mechanical activation of a chemically coprecipitated precursor[J].Journal of the American Ceramic Society,2002(11):2660-2665. |
| [2] | Lijin Xie;Junfeng Ma;Pingwei Wu;Hua Tian;Zhongqiang Zhao;Jun Zhou;Yingmo Hu;Yonggang Wang;Jiantao Tao;Xiaoyi Zhu .Hydrothermal synthesis and characterization of bismuth titanate regular tetrahedron crystallites[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2007(2):389-393. |
| [3] | Takashi Kojima;Ikue Yoshida;Naofumi Uekawa .Effect of treatment conditions and titanium source on the hydrothermal synthesis of bismuth titanate particles[J].Journal of the European Ceramic Society,2009(3):431-437. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%