Seyed Ali Akbar Sajadi, Zeynab Khorablou, Alireza Nazari Alavi
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引用次数: 0
Abstract
This study explored thermal behavior of four kinds of chromium compounds such as CrO3, K2Cr2O7, K2CrO4, and Cr2O3 using thermogravimetry (TG) and differential scanning calorimetry (DSC) method under the oxygen (O2) and nitrogen (N2) gas atmosphere at varying temperatures (25 to 1600 ℃). A diverse of chromium compounds were carefully evaluated for the first time through this method, and the present work provides new, comprehensive and valuable information regarding the mentioned compounds. XRD technique and elemental analysis were applied in order to recognize the products at diverse decomposition stages. The obtained products were then investigated via a SEM electron microscope. Also, the form and the size of crystals were explored. Interestingly, the results obtained from both TG and DSC experiments in O2 and N2 atmospheres were identical. The thermodynamic data obtained from DSC experiments are reported in this work. Along with ∆H for each peak. It was shown that the decomposition product of K2Cr2O7 was also a mixture of Cr2O3 and K2CrO4 at 1400 °C.
This study explored thermal behavior of four kinds of chromium compounds such as CrO3, K2Cr2O7, K2CrO4, and Cr2O3 using thermogravimetry (TG) and differential scanning calorimetry (DSC) method under the oxygen (O2) and nitrogen (N2) gas atmosphere at varying temperatures (25 to 1600 ℃). A diverse of chromium compounds were carefully evaluated for the first time through this method, and the present work provides new, comprehensive and valuable information regarding the mentioned compounds. XRD technique and elemental analysis were applied in order to recognize the products at diverse decomposition stages. The obtained products were then investigated via a SEM electron microscope. Also, the form and the size of crystals were explored. Interestingly, the results obtained from both TG and DSC experiments in O2 and N2 atmospheres were identical. The thermodynamic data obtained from DSC experiments are reported in this work. Along with ∆H for each peak. It was shown that the decomposition product of K2Cr2O7 was also a mixture of Cr2O3 and K2CrO4 at 1400 °C.
期刊介绍：
Journal of Thermal Analysis and Calorimetry is a fully peer reviewed journal publishing high quality papers covering all aspects of thermal analysis, calorimetry, and experimental thermodynamics. The journal publishes regular and special issues in twelve issues every year. The following types of papers are published: Original Research Papers, Short Communications, Reviews, Modern Instruments, Events and Book reviews.
The subjects covered are: thermogravimetry, derivative thermogravimetry, differential thermal analysis, thermodilatometry, differential scanning calorimetry of all types, non-scanning calorimetry of all types, thermometry, evolved gas analysis, thermomechanical analysis, emanation thermal analysis, thermal conductivity, multiple techniques, and miscellaneous thermal methods (including the combination of the thermal method with various instrumental techniques), theory and instrumentation for thermal analysis and calorimetry.
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