Isothermal Crystallization and Time–Temperature Transformation of Amorphous Nifedipine: A Case of Polymorphism Formation and Conversion

Author(s):  
Sixue Cheng ◽  
Gregory B. McKenna
Author(s):  
Liyang Yu ◽  
Andrew M. Zeidell ◽  
John E. Anthony ◽  
Oana D. Jurchescu ◽  
Christian Müller

Thermal annealing of organic semiconductors is critical for optimization of their electronic properties. The selection of the optimal annealing temperature –often done on a trial-and-error basis– is essential for achieving...


2014 ◽  
Vol 46 (1) ◽  
pp. 286-303 ◽  
Author(s):  
Yadira G. Maldonado ◽  
Claudia Barraza de la P. ◽  
Sergio Rodríguez A. ◽  
A. Humberto Castillejos E. ◽  
Brian G. Thomas

Author(s):  
K.B. Reuter ◽  
D.B. Williams ◽  
J.I. Goldstein

In the Fe-Ni system, although ordered FeNi and ordered Ni3Fe are experimentally well established, direct evidence for ordered Fe3Ni is unconvincing. Little experimental data for Fe3Ni exists because diffusion is sluggish at temperatures below 400°C and because alloys containing less than 29 wt% Ni undergo a martensitic transformation at room temperature. Fe-Ni phases in iron meteorites were examined in this study because iron meteorites have cooled at slow rates of about 10°C/106 years, allowing phase transformations below 400°C to occur. One low temperature transformation product, called clear taenite 2 (CT2), was of particular interest because it contains less than 30 wtZ Ni and is not martensitic. Because CT2 is only a few microns in size, the structure and Ni content were determined through electron diffraction and x-ray microanalysis. A Philips EM400T operated at 120 kV, equipped with a Tracor Northern 2000 multichannel analyzer, was used.


CIM Journal ◽  
2015 ◽  
Vol 6 (1) ◽  
pp. 42-50 ◽  
Author(s):  
K. Ebrahimi-Nasrabadi ◽  
M. Barati ◽  
P. W. Scott

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