Ca3R2-xWO9:xEu3+　(R=Y,　Gd)　red-emitting　phosphors　were　prepared　by　solid　state　reactions.　These　samples　were　characterized　by　differential　scanning　calorimetry　and　thermogravimetry　analysis　(DSC-TGA),　X-ray　diffraction　(XRD),　Fourier　transform　infrared　spectroscopy　(FTIR),　photoluminescence　(PL)　and　field　emission　scanning　electron　microscopy　(FE-SEM)　analyses.　The　optimum　sintering　temperature　for　these　phosphors　was　1100°C,　and　the　optimum　sintering　time　was　2　h.　The　optimum　doped　concentration　of　Eu3+　in　Ca3Y2-xWO9:xEu3+　and　Ca3Gd2-xWO9:xEu3+　were　x=1.5　and　x=1.1,　respectively.　These　phosphors　could　be　excited　by　near-UV　light　of　394　nm　and　blue　light　of　465　nm,　and　showed　strong　red　emission　line　at　612　nm　(5D0→7F2),　which　indicated　that　Ca3R2-xWO9:xEu3+　(R=Y,　Gd)　were　promising　red　candidates　for　white　LED.　©　2015　The　Chinese　Society　of　Rare　Earths.