HIGH-TEMPERATURE HEAT CAPACITIES OF THE PHASES IN Y-Ba-Cu-O SYSTEM
来源期刊：中国有色金属学报(英文版)1995年第4期
论文作者：Zhang Hengzhong Fang Zheng Zhang Pingmin Chen Xinmin
文章页码：31 - 35
Key words：heat capacity; high-temperature; DSC; TG; superconductor; Y-Ba-Cu-O system
Abstract: TG and DSC techniques were used to investigate the phases and the reaction behavior at elevated temperatures of the oxygen-nonstoichiometric compounds YBa2Cu3O7-x and BaCuO2+x 。Based on the results of TG and DSC experiments,appropriate procedures were found for heat capacity measurements of the phases with DSC method.Combined with the drop method,the heat capacities of the phases YBa2Cu3O6.90,Y2Cu2O5,Y2BaCuO5 and BaCuO2.42 were measured from room temperature to 973 K.The results for these phases are represented respectively as follows: Cp(J/mol·K)=333.97-454.43×10-3T+41.836×105T-2+794.18×10-6T2 Cp(J/mol·K)=149.82+113.02×10-3T Cp(J/mol·K)=329.09-361.56×10-3T-42.745×105T-2+341.43×10-6T2 Cp(J/mol·K)=77.628-14.018×10-3T+18.141×105T-2+130.85×10-6T2.
