The Effects of Heat Treatment on the Infrared Emissivity of PbO

The effects of heat treatment temperature on the infrared emissivities of PbO samples are investigated by XRD and FTIR.The results show that,the crystal structure of PbO changes with increase of heat treatment temperature,and at the same time the infrared emissivities of PbO samples reduce firstly and then increase.When the heat treatment temperature is at 400℃,the infrared emissivity lower to 0.08 at 3～5 μm wave band and 0.58 at 8～14 μm.The infrared emissivity changes with the increase of heat treatment temperature,It is because of the change of the crystal structure of PbO.The infrared emissivity decrease when the crystal lattice tends to be tight.