Formation of CoB by Pyrolysis of CoB10H10

CoB was synthesized by pyrolysis of CoB10H10 at 1250kg/cm2, atmospheric pressure and 10-5 Torr. The characteristic absorption bands at 2500, 1070 and 1015cm-1 of CoB10H10 disappeared after heat treatment at 400°C and 10-5Torr for 1h. The formation temperature of CoB by pyrolysis at 1250kg/cm2 was 550°C, which was lower by 50°C than those of pyrolysis at atmospheric pressure and 10-5Torr. The crystallinity of CoB synthesized at 650°C and 1250kg/cm2 was comparable with those formed at 800°C and atmospheric pressure. The amount of boric acid as a by-product decreased as the pressure of pyrolysis decreased from 1250kg/cm2 to 10-5Torr.