A　series　of　Si3N4　doping　Y2.9Ce　0.1Al5-xSixO12-3x/2N4x/3　phosphors　were　prepared　by　solid-state　reaction　in　95%N2-5%H2　reduced　air　ambience.　The　XRD　characteristics　plus　Rietveld　refinement　results　shows　that　the　as-sintered　powders　are　unique　crystal　phase　with　the　same　crystal　structure　of　Y3Al5O12　(PDF　No.　79-1891).　The　N　element　was　not　detected　by　the　analysis　of　X-ray　photoelectron　spectroscopy　(XPS)　and　energy　dispersive　X-ray　spectrum　(EDS).　The　photoluminescence　spectra　(PL　&　PLE)　tests　show　that　the　exciting　and　emitting　intensity　of　PLE　&　PL　gradually　increase　due　to　the　increase　of　Si3N4　concentration.　Meanwhile,　the　phosphorescence　decay　times　are　prolonged　from　45　ns　(x　=　0)　to　78　ns　(x　=　0.3),　under　the　monitor　of　530　nm　wavelength.　The　thermoluminescence　tests　(TL)　confirm　the　thermal　stability　of　as-phosphors　with　Si3N4　addition　is　much　better　than　that　of　the　pristine　Y2.9Ce0.1Al5O12　phosphors.　©　2014　Elsevier　B.V.　All　rights　reserved.