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分别在空气、还原气体、再空气、最后再在还原气体等气氛中通过四个步骤合成了Sr1.99MgSi2O7:Eu0.01.在空气中合成的样品呈现出Eu2+和Eu3+两种价态的发光特征峰,而在还原气体中合成的样品,只呈现出Eu2+一种价态的特征发光峰,并且有长余辉和两个热致发光带.但若样品直接在还原气氛下合成,则只呈现一个热致发光带.样品在空气中合成产生空穴陷阱,此陷阱在还原合成气氛下仍被保留,并与还原气体合成条件下产生的电子陷阱有所区别,最终导致两个热致发光带.
Sr1.99MgSi2O7: Eu0.01 were synthesized in four steps: air, reducing gas and air respectively, and finally the luminescent properties of Eu2 + and Eu3 + were obtained. Peak, whereas the sample synthesized in reducing gas showed only one characteristic emission peak of Eu2 + with long afterglow and two thermoluminescent bands, but only one sample was synthesized directly under reducing atmosphere Photoluminescent bands were synthesized in the air to generate hole traps, which were retained in the reductive synthesis atmosphere and distinguished from the electron traps generated by the synthesis of reducing gas, eventually resulting in two thermoluminescent bands.