appearance defect
2.Traditional casting iron type radiator have appearance to be bad coming loose hot low grade defect, for not meeting the needs of modern quality .
3.The 360 cm-1 peak is attributed to the O implantation induced defect complexes(vacancies,interstitial,or anti-sites in the host). The appearance of the 360 cm-1 mode results in the decrease of the Er 3+-related infrared PL of GaN:Er+O.
