Abstract
Abstract Eu2+-activated Sr2SiO4 phosphor was successfully synthesized by a sol–gel method using sodium silicate and SrO as the starting materials. The wavelength of the emission peak and the emission intensity of the phosphor powders were influenced by the pre-treating temperature. The maximum emission intensity of the phosphor was found as pre-treated at 1200 °C in air and then heated at 1300 °C in the reducing atmosphere (10% H2 + 90% He). As the pre-treating temperature was 1200 °C, the decrease of the emission intensity may be caused from the reversible phase transformation of Sr3SiO5 → Sr2SiO4 at 1300 °C, which also shows the red-shift behavior.
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