To investigate the development and densification YBa2Cu3O7-x(1-2-3) superconducting phase, the 1-2-3 phase powders have been prepared by citrate and nitrate processes with changing calcination temperature. Nearly pure 1-2-3 phase peaks have been obtained by calcining the precursor in air at 90$0^{circ}C$ for 2.5h in citrate process but at 95$0^{circ}C$ for 2.5h in nitrate process. The sintering density of citrate derived sample calcined at 80$0^{circ}C$ has been about 4% higher than that calcined at 90$0^{circ}C$, although the compacting density has been lower at 80$0^{circ}C$ calcination. This can be explained that the 1-2-3 phase particles formed at 80$0^{circ}C$ have reactive sub-micron size which has good sinterbililty.