The effect of Y and Sb co-doping on the luminescence property of PbWO 4 crystals has been investigated. Compared with undoped PbWO4, the transmittance and emission peak intensity of Y∶Sb∶PbWO 4 crystals were obvious...The effect of Y and Sb co-doping on the luminescence property of PbWO 4 crystals has been investigated. Compared with undoped PbWO4, the transmittance and emission peak intensity of Y∶Sb∶PbWO 4 crystals were obviously improved. In addition, its transmittance cutoff wavelength and emission peak shifted to the shorter one. The mechanism of effect of Y and Sb on the transmittance spectra was briefly discussed. The light yield of Y∶Sb∶PbWO 4 crystals was 25p.e./MeV, which was two times of that of undoped PbWO 4. Our experiments showed that Y and Sb co-doping was a selectable method to improve the luminescence property of PbWO 4.展开更多
A novel low temperature phase K3Sb0.3Y4O8. 6H2O was synthesized hydrother-mally from K2O-Sb2O3-Y2O3-H2O system, and characterized by means of XRD, SEM, IR,TG, DTA and ICP methods- The unit cell for the product is hexa...A novel low temperature phase K3Sb0.3Y4O8. 6H2O was synthesized hydrother-mally from K2O-Sb2O3-Y2O3-H2O system, and characterized by means of XRD, SEM, IR,TG, DTA and ICP methods- The unit cell for the product is hexagonal with the cell parame-ters a = 1.657 6nm and c= 1.186 5 nm. The volume of the cell is calculated to be 2. 823 3nm3. The product was decomposed into oxides from 310℃ to 390 ℃.展开更多
The new intermetallic compound La3Cu3Bi4 was synthesized by arc melting method followed by annealing.The crystal structure refined using the Rietveld method and X-ray powder diffraction data showed to be Y3Au3Sb4 stru...The new intermetallic compound La3Cu3Bi4 was synthesized by arc melting method followed by annealing.The crystal structure refined using the Rietveld method and X-ray powder diffraction data showed to be Y3Au3Sb4 structure type with space group I43D(No.220).The unit cell parameters were a = 0.997 797(7) nm and V = 0.993 41(2) nm3.The structure was characterized by covalent Cu-Bi4 tetrahedron, which formed three-dimensional network by sharing corners and La atoms separated in the space of Cu-Bi4 tetragon.The expansion of La3Cu3Bi4 studied by using low temperature X-ray di?raction showed to be positive expansion and diminished with the temperature rising.展开更多
文摘The effect of Y and Sb co-doping on the luminescence property of PbWO 4 crystals has been investigated. Compared with undoped PbWO4, the transmittance and emission peak intensity of Y∶Sb∶PbWO 4 crystals were obviously improved. In addition, its transmittance cutoff wavelength and emission peak shifted to the shorter one. The mechanism of effect of Y and Sb on the transmittance spectra was briefly discussed. The light yield of Y∶Sb∶PbWO 4 crystals was 25p.e./MeV, which was two times of that of undoped PbWO 4. Our experiments showed that Y and Sb co-doping was a selectable method to improve the luminescence property of PbWO 4.
文摘A novel low temperature phase K3Sb0.3Y4O8. 6H2O was synthesized hydrother-mally from K2O-Sb2O3-Y2O3-H2O system, and characterized by means of XRD, SEM, IR,TG, DTA and ICP methods- The unit cell for the product is hexagonal with the cell parame-ters a = 1.657 6nm and c= 1.186 5 nm. The volume of the cell is calculated to be 2. 823 3nm3. The product was decomposed into oxides from 310℃ to 390 ℃.
文摘The new intermetallic compound La3Cu3Bi4 was synthesized by arc melting method followed by annealing.The crystal structure refined using the Rietveld method and X-ray powder diffraction data showed to be Y3Au3Sb4 structure type with space group I43D(No.220).The unit cell parameters were a = 0.997 797(7) nm and V = 0.993 41(2) nm3.The structure was characterized by covalent Cu-Bi4 tetrahedron, which formed three-dimensional network by sharing corners and La atoms separated in the space of Cu-Bi4 tetragon.The expansion of La3Cu3Bi4 studied by using low temperature X-ray di?raction showed to be positive expansion and diminished with the temperature rising.
