Y‐base and Bi‐base high‐Tcoxide superconductors have been successfully synthesized by the citric acid salt decomposition process.Tc’s of 92 K and 109 K have been obtained after a relatively short sintering in the Y‐system and Bi‐system, respectively. The fine dispersion of particles Ag in the Y‐base oxide appreciably decreases the sintering temperature and enhances the transportJc. The intermediate press increases bothTcandJcin bi‐base oxide. AJc(77 K) of 1500 A/cm2has been obtained in the sintered Bi‐base specimen.