Dehydration studies of rare earth p-toluenesulfonate hydrates by TG/DTG and DSC

被引：4

作者：

dos Santos, AV

Matos, JR ^{[1
]}

机构：

[1] UEPB, CCT, Dept Quim, BR-58100001 Campina Grande, PB, Brazil

[2] Univ Sao Paulo, Inst Quim, BR-05508900 Sao Paulo, SP, Brazil

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2002年 / 344卷 / 1-2期

关键词：

dehydration; p-toluenesulfonates; rare earth; differential scanning calorimetry (DSC); thermogravimetry/derivative thermogravimetry; (TG/DTG);

D O I：

10.1016/S0925-8388(02)00339-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The dehydration process of the compounds RE(C7H7SO3)(3).xH(2)O (where x=2 for RE=La-Ho, Tm, Yb and Y; x=7 and 6 for RE=Er and Lu, respectively) has been investigated by thermogravimetry/derivative thermogravimetry (TG/DTG) and differential scanning calorimetry (DSC) techniques. The TG/DTG curves show that the dehydration process does not depend on the atmosphere used. For the compounds of La-Gd, dehydration occurs in a single step while for the compounds of heavier lanthanoid (Dy-Lu) and yttrium it occurs in two stages. The total dehydration DeltaH for each compound was determined by DSC and the values vary between 67 and 381 kJ mol(-1) along the series. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：195 / 198

页数：4