Growth and thermal kinetics of pure and cadmium doped barium phosphate single crystal
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Non-isothermal kinetic parameter of pure and cadmium-doped barium phosphate single crystal grown by room temperature solution technique have been investigated. Single crystal X-ray diffraction establishes grown crystal to be orthorhombic in nature. Scanning electron microscopy supplemented with energy dispersive X-ray analysis was used to study the surface features and to find the exact stoichiometric composition of the grown crystal. Fourier transform infrared spectroscopy studies confirm the presence of various functional groups. The effect of cadmium doping on pure barium phosphate single crystal was studied using thermogravimetry analysis. Thermogravimetry studies shows that the pure crystal was stable up to a temperature of 330 °C whereas doped crystal was stable up to a temperature of 240 °C, i.e., pure crystals were more stable than doped ones. Various solid-state reaction kinetics, i.e., activation energy (E a), frequency factor (Z), and entropy (ΔS*) was calculated out to find the mechanism of thermal decomposition at different stages for pure and cadmium doped barium phosphate.
KeywordsTransition metal compound Crystal growth Phase transitions thermogravimety Differential thermal analysis Differential scanning calorimetry
Authors are thankful to Prof. Rajnikant for carrying out single crystal X-ray studies using Single Crystal Oxford X-ray Diffractometer, sanctioned as National Facility by DST, India to the Department of Physics, University of Jammu.
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