By　using　a　new　TG　setup,　the　isothermal　synthetic　rate　of　Fe2VO4　from　Fe2O3　and　V2O3　powder　mixtures　in　the　temperature　range　from　1273　K　to　1473　K　under　CO　and　CO2　mixture　atmosphere　(CO/CO2　=　0.25,　0.5　and　1.0)　were　investigated.　Then,　by　combining　with　XRD　and　SEM　measurements　of　the　reacted　samples,　the　rate-controlling　mechanism　was　deduced.　Finally,　taking　into　account　the　effect　of　atmosphere,　the　kinetic　models　of　the　synthetic　process　were　established.　In　the　whole　synthetic　process,　no　intermediate　product　was　formed,　and　the　reaction　completed　quickly　within　60　min.　The　higher　is　the　CO　content　in　the　atmosphere,　the　faster　is　the　synthetic　rate.　In　the　first　stage　of　the　synthetic　reaction,　in　which　the　reaction　fraction　is　less　than　0.8,　the　reaction　is　mainly　controlled　by　the　resistance　of　the　phase　boundary　to　the　passage　of　reactants　atomic　particles.　The　rate　is　proportional　to　the　0.96　power　of　the　CO　partial　pressure　(p(CO)(0.96)),　and　the　apparent　activation　energy　of　this　stage　is　10.96　kJ/mol.　As　the　synthetic　reaction　progresses　and　the　thickness　of　the　product　layer　increases,　the　diffusional　resistance　of　the　product　layer　increases　gradually　and　becomes　dominant.　In　the　later　stage,　the　synthetic　rate　is　controlled　by　solid-state　diffusion.　The　rate　is　proportional　to　0.86　power　of　the　CO　partial　pressure　(p(CO)(0.86)),　and　the　apparent　activation　energy　of　this　stage　is　18.39　kJ/mol.　(C)　2019　Elsevier　B.V.　All　rights　reserved.