Monoclinic Li2TiO3 nano-particles via hydrothermal reaction: Processing and structure

被引：69

作者：

Yu, Cheng-Long ^{[1
,2
]}

Yanagisawa, Kazumichi ^{[2
]}

Kamiya, Sumio ^{[3
]}

Kozawa, Takahiro ^{[4
]}

Ueda, Tadaharu ^{[5
]}

机构：

[1] Shaanxi Univ Sci & Technol, Sch Mat Sci & Engn, Xian 710021, Peoples R China

[2] Kochi Univ, Fac Sci, Res Lab Hydrothermal Chem, Kochi 7808520, Japan

[3] Toyota Motor Co Ltd, Toyota, Aichi 4718572, Japan

[4] Osaka Univ, Joining & Welding Res Inst, Osaka 5670047, Japan

[5] Kochi Univ, Fac Sci, Dept Appl Chem, Kochi 7808520, Japan

来源：

CERAMICS INTERNATIONAL | 2014年 / 40卷 / 01期

关键词：

Monoclinic Li2TiO3 fine particles; Hydrothermal reaction; Anatase TiO2; Structure; Formation mechanism; AMORPHOUS TITANIA; ANATASE; OXIDES;

D O I：

10.1016/j.ceramint.2013.07.097

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Pure phase Li2TiO3 nano-particles were synthesized via hydrothermal reaction using anatase TiO2 and LiOH center dot H2O at 200 degrees C. No development of the (002) supercell diffraction peak is exhibited in the XRD pattern. In contrast, by further calcination above 500 degrees C for 6 h in air, full development of the (002) supercell diffraction peak is observed. TEM observation and particle size analysis indicate that the general particle size is around 114 nm. HR-TEM observation and the 2D FFT analysis show that the layered structure corresponding to the LiTi2 layer is clearly developed. During calcination, additional Li ions diffuse into the supercell, corresponding with the diffusion of Ti ions away from the interslab into the slab, forming a more stable structure. Lithium insertion, corresponding with dissolution and precipitation mechanism is proposed for the formation of Li2TiO3. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：1901 / 1908

页数：8

共 18 条

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