INVESTIGATION OF SOLID-STATE REACTIONS AND SOLID-SOLID PHASE-TRANSFORMATIONS WITH TIME-RESOLVED AND TEMPERATURE-RESOLVED X-RAY-POWDER DIFFRACTOMETRY

被引:20
作者
EPPLE, M [1 ]
CAMMENGA, HK [1 ]
机构
[1] TECH UNIV BRAUNSCHWEIG,INST PHYS & THEORET CHEM,W-3300 BRAUNSCHWEIG,GERMANY
来源
BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1992年 / 96卷 / 11期
关键词
CHEMICAL KINETICS; CRYSTALS; PHASE TRANSITIONS; SOLID STATE REACTIONS; X-RAY DIFFRACTION;
D O I
10.1002/bbpc.19920961150
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
An X-ray powder diffractometer has been equipped with a heatable sample holder which allows highly defined heating up to 250-degrees-C. A good temperature control permits isothermal as well as non-isothermal runs. The applicability of time- and temperature-resolved X-ray powder diffractometry (TXRD) as a thermoanalytical method is demonstrated. Solid state reactions and solid-solid phase transformations were investigated. As examples the phase transformation of phenanthrene and the dehydration of caffeine hydrate are presented. It is possible to extract the activation parameters for a solid state reaction from a single non-isothermal run with a constant heating rate. The principles of the quantitative kinetic evaluation of time- and temperature-resolved X-ray powder diffraction data are outlined.
引用
收藏
页码:1774 / 1778
页数:5
相关论文
共 20 条