1. Study on the changes of emissivity of basic copper carbonate in the decomposition process
- Author
-
Li Longfei, Kun Yu, Yufang Liu, Zhao Baolin, and Zhang Kaihua
- Subjects
Fluid Flow and Transfer Processes ,Diffraction ,Materials science ,Spectrometer ,Infrared ,Astrophysics::High Energy Astrophysical Phenomena ,Mechanical Engineering ,Chemical process of decomposition ,Analytical chemistry ,Astrophysics::Cosmology and Extragalactic Astrophysics ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,010305 fluids & plasmas ,chemistry.chemical_compound ,chemistry ,0103 physical sciences ,Basic copper carbonate ,Emissivity ,Fourier transform infrared spectroscopy ,0210 nano-technology ,Astrophysics::Galaxy Astrophysics ,Intensity (heat transfer) - Abstract
The spectral emissivity of basic copper carbonate (Cu2(OH)2CO3) was measured by a Fourier Transform Infrared (FTIR) spectrometer in the wavelength range of 5–20 μm during the heating process, and the integral emissivity was calculated to study the effect of decomposition on emissivity. The surface composition of the samples was investigated by X-ray diffraction. Based on the spectral emissivity data and the measurement of X-ray diffraction, it can be concluded that Cu2(OH)2CO3 starts breaking down at 513 K and exists a critical state at 453–493 K. This state would cause a drop in spectral emissivity value, and enhance the oscillation intensity of spectral emissivity in 5–8 μm and spectral absorption at 14.95 μm. Above 513 K, heating time and temperature have great influences on emissivity. The emissivity changes more obvious as the increasing temperature. The emissivity of Cu2(OH)2CO3 gradually tends to be stable with heating time when the decomposition process is completed.
- Published
- 2019