Title of article :
Studies on thermal hysteresis of KNO3 by thermo-Raman spectroscopy
Author/Authors :
Ramaswamy Murugan، نويسنده , , Pei Jane Huang، نويسنده , , Anil Ghule، نويسنده , , Hua Chang، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2000
Pages :
8
From page :
83
To page :
90
Abstract :
In this work, the polymorphic phase transformations of KNO3were studied by thermo-Raman spectroscopy in a dynamical thermal process with a heating rate of 5°C min−1 from 30°C to 170°C and then cooling down to 30°C at the same rate. Three distinct phase transformations were detected. The characteristic spectrum for each phase was identified. The nature of each phase transformation was investigated in detail through the studies on spectral variation, intensity, intensity variation and shift in band position. In addition, the intensity variation of the ν1 mode at 1042 cm−1 clearly revealed thermal hysteresis involved in the phase transformation of KNO3. Furthermore, the thermal hysteresis of each phase was also obtained from the ν3 mode in the range from 1341 to 1354 cm−1.
Keywords :
Phase transformations , Thermo-Raman spectroscopy , KNO3 , Thermal hysteresis
Journal title :
Thermochimica Acta
Serial Year :
2000
Journal title :
Thermochimica Acta
Record number :
1194574
Link To Document :
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