Abstract
An extensive and systematic study of heat treatment for the synthesis of the 2223 phase has been performed. Results of X-ray diffraction (XRD), scanning electron microscopy (SENT) and energy dispersive X-ray micro-analysis (EDX) are presented. It is found experimentally that the most efficient heat treatment temperature to obtain the specimen having a high volume fraction of 2223 phase is 1133K. The formation of the 2223 phase begins substantially in only one hour after the reaching to 1133K. In addition, the thermal hysteresis is essential. Once the specimen is calcined below 1133K, for example at 1073K, impurities such as Ca(Sr)-Cu oxides are inevitably included in the final product, even though the firing is made subsequently at 1133K. The forming of the Ca(Sr)-Cu oxides, which arise from the intermediate step in the heat treatment process, influences strongly and prohibits to grow the 2223 phase. It is stressed that the calcining at 1133K is important and key technique.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
