Synthesis of the Ca_0.45Cu_0.55O peritectic phase using a mixture of nitrate powders

摘要

The Ca_0.45Cu_0.55O phase was successfully produced from a mixture of Ca and Cu nitrite powders with cation ratio Ca:Cu=1:1. The heat treatment for decomposition and the synthesis of the indicated phase were performed at 710degC in air and flowing oxygen, respectively. The Ca_0.45Cu_0.55O phase concentration increases with synthesis time. After 209 h of heat treatment, the concentration of the Ca_0.45Cu_0.55O phase determined by X-ray diffraction (XRD) analysis has reached 87/100 and the kinetic data have indicated that the material enters the saturation stage of the reaction. The secondary phases are CaO and CuO.