AlB AlB2 – A NEW SELECTIVE COATING

摘要

The aluminum boride (AlB AlB2) selective coating has been developed on aluminum substrate at low temperature (100-110) ) oC by chemical conversion method. The crystal structure of AlB C AlB2 selective coating has been identified by X-ray diffraction (XRD) method. In the XRD pattern, fundamental peaks of both the AlB AlB2 and pure Al were identified. To confirm our results, chemical analysis method was used. In the chemical process, Al was found to be 51.0 %, B = 37.5 %, O = 6.5 %, Cu as impurity = 2.0 % and other impurities = 3.0 %, which confirmed the presence of Al and B in the sample. The thermal and optical properties of this coating like emittance, reflectance and absorptance were studied and the best values were recorded as 0.05, 0.0011 and 0.9989 respectively. The selectivity factor was found 19.94. SEM study was also carried out.