Calcination syntheses of a series of potassium titanates and their morphologic evolution

被引：52

作者：

Bao, NH

Feng, X

Shen, LM

Lu, XH ^{[1
]}

机构：

[1] Nanjing Univ Chem Technol, Dept Chem Engn, Nanjing 210009, Peoples R China

[2] Nanjing Univ Chem Technol, Dept Mat Sci & Engn, Nanjing 210009, Peoples R China

来源：

CRYSTAL GROWTH & DESIGN | 2002年 / 2卷 / 05期

关键词：

D O I：

10.1021/cg025541+

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In the present study, K2Ti2O5.0.5H(2)O, K2Ti2O5, K2Ti4O9, K2Ti6O13(I), and K2Ti6O13(II) were synthesized by calcination from TiO2.nH(2)O hydrate at 650, 820, 920, 1080, and 1123 degreesC, respectively. K2Ti2O5.0.5H(2)O and K2Ti2O5 are composed of grain aggregates and single crystals, respectively. K2Ti4O9, K2Ti6O13(I), and K2Ti6O13(II) all have whisker morphology. The K2Ti4O9 whiskers and hydrosoluble surface wrappage occurred simultaneously in the K2Ti2O5 single crystals at 920 degreesC during calcination. Subsequently, K2Ti6O13(I) whiskers, coated by more hydrosoluble wrappage generated from both the K2Ti2O5 single crystals and the K2Ti4O9 whiskers, evolved in the K2Ti4O9 whiskers at 1080 degreesC. K2Ti6O13(I) whiskers converted into K2Ti6O13(II) whiskers through a crystal lattice deformation occurring at 1123 degreesC. The sinters of K2Ti4O9, K2Ti6O13(I), and K2Ti6O13(II) are all composed of the axial-array whisker sheaves.

引用

页码：437 / 442

页数：6

共 21 条

[1] Study on the formation and growth of potassium titanate whiskers [J].