Polycrystalline　AgxCa3-xCo4O9　(x　=　0-0.6)　compound　samples　were　prepared　by　combining　citrate　acid　sol-gel　method　with　spark　plasma　sintering　and　the　phase　composition,　orientation,　texture　and　high　temperature　transport　properties　were　investigated　in　detail.　The　results　show　that　main　phase　AgxCa3-xCo4O9　compounds　are　formed　with　a　small　quantity　of　silver　phase　which　distributes　unevenly　in　the　AgxCa3-xCo4O9　matrix　and　so　greatly　weakens　the　orientations　of　AgxCa3-xCo4O9.　All　samples　exhibit　semiconductor　transport　properties　except　for　the　x　=　0.6　sample　which　exhibits　metallic　transport　characteristic.　The　electrical　resistivity　and　the　Seebeck　coefficient　are　simultaneously　decreased　with　increasing　Ag　substitution.　The　reasons　are　attributed　to　hole　concentration　adjustment　and　shortcut　effect　of　distributed　Ag　in　AgxCa3-xCo4O9　matrix　during　conduction　process.　The　power　factor　as　a　function　of　Seebeck　coefficient　and　resistivity　could　be　altered　with　x　and　it　is　enhanced　at　x　=　0.3　with　its　value　exceeding　6.8　mu　W/cm　K-2　at　1033　K　indicating　that　the　electrical　properties　could　be　improved　by　optimizing　the　composition　and　texture　in　sol-gel　process.　(C)　2008　Elsevier　B.V.　All　rights　reserved.