The $Y_2 BaCuO_5$ phase was synthesized under various calcination temperatures and sintered. The $Y_2 BaCuO_5$ phase strarted to form at $850^{circ}C$ for 6hours calcination time and, at $1000^{circ}C$, all the X-ray diffraction peaks corresponded to $Y_2 BaCuO_5$. The sintered density of $Y_2 BaCuO_5$ was increased to 97 % of its theoretical density by the control of calcination temperature.