Sm/Sb共掺(Bi0.5Na0.5)0.935Ba0.065TiO3陶瓷的电致应变与光致发光特性  

Photoluminescence and Electric-field-induced Strain of Sm/Sb-doped(Bi0.5Na0.5)0.935Ba0.065TiO3 Multifunctional Ceramics

作　　者：梁岑 李伟[1] 楚丙凯 郝继功[1] 李伟 LIANG Cen;LI Wei;CHU Bingkai;Hao Jigong;Li Wei(College of Materials Science and Engineering,Liaocheng University,Liaocheng 252059,Shandong,China)

机构地区：[1]聊城大学材料科学与工程学院,山东聊城252059

出　　处：《硅酸盐学报》2020年第3期351-355,共5页Journal of The Chinese Ceramic Society

基　　金：国家重点研发计划(2016YFB0402701);山东省高等学校优秀青年创新团队支持计划(2019KJA025);聊城大学科研项目(318011906).

摘　　要：介绍了一种无铅发光应变材料(Bi0.5Na0.5)0.935–xSmxBa0.065Ti1–xSbxO3(BNT–0.065BT–x Sm Sb)陶瓷。研究了Sm/Sb对BNT–0.065BT相结构、形貌和电性能的影响。BNT–0.065BT–x Sm Sb陶瓷均呈现纯钙钛矿相结构。Sm/Sb的加入诱导铁电弛豫相变,从而促进了应变的改善。当x=0.004时,单极应变为0.31%(70 k V/cm),相当于大信号d33*(Smax/Emax)为443 pm/V。此外,发光性能研究表明,BNT–0.065BT–x Sm Sb陶瓷在407 nm激发下呈现明亮的橙红色发光。发光强度随着Sm/Sb掺杂浓度的增加而增大,其主要发射峰为599 nm附近的强红色发射峰,对应于4G5/2→6H7/2跃迁。BNT–0.065BT–xSmSb陶瓷作为一种多功能材料,在光电一体化和耦合器件的应用中显示出巨大的潜力。In this paper,new lead-free luminescent ferroelectric materials,(Bi0.5Na0.5)0.935–xSmxBa0.065Ti1–xSbxO3(BNT–0.065 BT–x Sm Sb)ceramics,were prepared by introducing Sm/Sb.The influence of Sm/Sb on the phase structure,microstructure and electrical functions of BNT–0.065 BT was systematically studied.BNT–0.065 BT–x Sm Sb ceramics presented a pure perovskite phase structure.Doping with Sm/Sb induced a ferroelectric to relaxor phase transformation and thus promoted strain improvement.When x=0.004,the unipolar strain was 0.31%(70 kV/cm),equivalent to a large signal d33*(Smax/Emax)of 443 pm/V.Moreover,studies on the luminescence properties showed that BNT–0.065 BT–x Sm Sb ceramics exhibited bright orange-red luminescence under 407 nm excitation.The luminescence intensity increased as the Sm/Sb doping concentration increased.The main emission peak was a strong red emission peak located near 599 nm,corresponding to the 4 G5/2→6 H7/2 transition.As multifunctional materials,BNT–0.065 BT–x Sm Sb ceramics showed great latent capacity for optical–electrical integration and coupling device applications.

关 键 词：无铅陶瓷 电致应变 光致发光 

分 类 号：TQ174.1[化学工程—陶瓷工业]