Open AccessCrystallization of amorphous bismuth titanate
Author(s) -
Xu Guo-Cheng,
Liqing Pan,
Qingfeng Guan,
Guangtian Zou
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.3080
Subject(s) - bismuth titanate , materials science , bismuth , crystallization , differential thermal analysis , tetragonal crystal system , orthorhombic crystal system , amorphous solid , phase (matter) , metastability , titanate , diffraction , crystallography , chemical engineering , crystal structure , ceramic , ferroelectricity , composite material , optics , optoelectronics , metallurgy , chemistry , dielectric , physics , organic chemistry , engineering
The phase transformation of amorphous bismuth titanate fabricated by sol-gel method was investigated by X-ray diffraction (XRD), transmissions electron microscopy (TEM) and differential thermal analysis (DTA). The experimental results show that the four-step crystallizations were present on heating. The metastable phases Bi2O3 and TiO2 were formed firstly at 433℃, and Bi2Ti4O11 phase was subsequently formed at 488℃ by the reaction between Bi2O3 and TiO2. Sequential reaction between Bi2Ti4O11 and Bi2O3 resultedin the formation of Bi4Ti3O12 phase with tetragonal structure at about 644℃, and stable Bi4Ti3O12 phase with orthorhombic structure was finally formed at about 830℃.