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A novel Ba9Y2Si6O24(BYS) ceramic was fabricated by solid-state reaction process for the first time. Rietveld refinement of powder diffraction data suggest that BYS crystallize into a layered structure with space group of R-3(148). The microwave dielectric properties of BYS ceramics were found strongly related to the sintering temperature. The BYS samples sintered at 1400°C exhibit good microwave dielectric...
The influence of the replacement of SiN + by AlO + on crystal structure and luminescence properties is reported in a series of Sr 2 Si 5−x Al x N 8−x O x :0.02Eu 2+ phosphors. Changes of refined lattice parameters of the powder X-ray diffraction data suggest that preferential occupation occurred in the evolution of crystal structure:...
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