CAJ | 학술논문

采用高温固相法制备了不同Ce3+掺杂浓度的12CaO·7Al2O3(C12A7：x%Ce3+)陶瓷样品。在350 nm紫外光激发下,样品的发射光谱呈现为主峰位于440 nm的宽带,来源于Ce3+的5d1寅2 F5/2和2 F7/2的辐射跃迁。随着Ce3+掺杂浓度的增加,发射强度增大；当Ce3+摩尔分数超过0.7%时,有杂质相出现。为了进一步提高光致发光强度,采用自蔓延燃烧法合成了C12A7：0.5%Ce3+陶瓷样品。在H2气氛下热处理,通过改变笼中阴离子基团的种类和数目提高了陶瓷闪烁特性(发光强度和衰减时间)。结果表明,C12A7：Ce3+陶瓷是可应用于闪烁体的潜在材料。
채용고온고상법제비료불동Ce3+참잡농도적12CaO·7Al2O3(C12A7：x%Ce3+)도자양품。재350 nm자외광격발하,양품적발사광보정현위주봉위우440 nm적관대,래원우Ce3+적5d1인2 F5/2화2 F7/2적복사약천。수착Ce3+참잡농도적증가,발사강도증대；당Ce3+마이분수초과0.7%시,유잡질상출현。위료진일보제고광치발광강도,채용자만연연소법합성료C12A7：0.5%Ce3+도자양품。재H2기분하열처리,통과개변롱중음리자기단적충류화수목제고료도자섬삭특성(발광강도화쇠감시간)。결과표명,C12A7：Ce3+도자시가응용우섬삭체적잠재재료。
12CaO·7Al2 O3:Ce3+( C12A7:x%Ce3+) transparent ceramics were synthesized by a solid state method. Upon 350 nm UV excitation, a broad emission band located around 440 nm can be observed and it can be attributed to the transitions from 5d1 to 2 F5/2 and 2 F7/2 of Ce3+, respective-ly. It can be seen that the emitting intensity increases with the increasing of Ce3+ doping concentra-tion. When the mole fraction of Ce3+ exceeds 0. 7%, other impurities appear. To enhance the emit-ting intensity, C12A7:0. 5%Ce3+ transparent ceramics were prepared by a self-propagating combus-tion method. For the samples annealed in H2 ambient, the scintillation properties, such as the emitting intensity and decay time, are improved by controlling sorts and amounts of encaged anions in C12A7. The experiment results show that Ce3+ doped C12A7 might be a potential scintillation material.