CAJ | 학술논문

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Sr199MgSi2O7∶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.
분별재공기、환원기체、재공기、최후재재환원기체등기분중통과사개보취합성료Sr199MgSi2O7∶Eu0.01.재공기중합성적양품정현출Eu2+화Eu3+량충개태적발광특정봉,이재환원기체중합성적양품,지정현출Eu2+일충개태적특정발광봉,병차유장여휘화량개열치발광대.단약양품직접재환원기분하합성,칙지정현일개열치발광대.양품재공기중합성산생공혈함정,차함정재환원합성기분하잉피보류,병여환원기체합성조건하산생적전자함정유소구별,최종도치량개열치발광대.
Sr199MgSi2O7∶Eu0 01 samples were prepared in four steps under air,a reducing atmosphere,air again,and a reducing atmosphere again.The samples prepared in air showed both Eu2+and Eu3+em-ission while the samples prepared in a reducing atmosphere showed Eu2+emission with a long afferglow and two thermoluminescence(TL)bands.However,only one TL band was observed for the sample prepared directly in the reducing atmosphere.Hole traps were created during the synthesis in air and were preserved during the reducing synthesis.These hole traps are different from the electron traps created by a reducing atmosphere.The hole traps and the electron traps result in two TL bands.