Super-stable permittivity and low dielectric loss of(1-x)Na_(0.5)Bi_(0.5+y)TiO_(3-x)NaTaO_(3)ceramics within an ultra-wide temperature range  

作　　者：Pengrong Ren Han Zhao Xin Wang Yuhui Wan Zhiyong Liu Changbai Long Fuxue Yan Till Frӧmling Gaoyang Zhao 

机构地区：[1]Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology,School of Materials Science and Engineering,Xi'an University of Technology,Xi'an,710048,China [2]Laboratory of Thin Film Techniques and Optical Test,School of Photoelectrical Engineering,Xi'an Technological University,Xi'an,710032,China [3]School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang,330063,China [4]State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an,710049,China [5]Institute of Materials Science,Technische Universit€at Darmstadt,FB Nichtmetallisch-Anorganische Werkstoffe,Alarich-Weiss-Straße 2,D-64287,Darmstadt,Germany

出　　处：《Journal of Materiomics》2023年第3期482-491,共10页无机材料学学报（英文）

基　　金：supported by National Natural Science Foundation of China(51972265,52272121);the Innovation Capability Support Program of Shaanxi(Program No.2021KJXX-30);the German Ministry of Education and Research(BMBF)for funding the Young Investigator Group HTL-NBT within the program“NanoMatFutur”(Grant No.03XP0146).

摘　　要：This work designs a new system(1-x)Na_(0.5)Bi_(0.5+y)TiO_(3-x)NaTaO_(3)with a nonstoichiometric bismuth ratio,which is used as dielectrics of ceramics capacitors.Phase structure evolution of(1-x)Na_(0.5)Bi_(0.5+y)TiO_(3-x)NaTaO_(3)is characterized using XRD,Raman and TEM.Dielectric and resistant properties of(1-x)Na_(0.5)Bi_(0.5+y)TiO_(3-x)NaTaO_(3)are investigated with increasing concentration of NaTaO_(3).With these in-vestigations,the structure and defect chemistry of(1-x)Na_(0.5)Bi_(0.5+y)TiO_(3-x)NaTaO_(3)are rationalized and their respective impact on capacitor properties are elucidated.The optimized composition 0.8Na_(0.5)Bi_(0.51)TiO_(3)-0.2NaTaO_(3)possesses an ultra-wide operating temperature range(-92e398C),in which both stable permittivity and low dielectric loss is obtained.Furthermore,the fabrication of multilayer ceramics capacitors(MLCC)based on 0.8Na_(0.5)Bi_(0.51)TiO_(3)-0.2NaTaO_(3)dielectrics is investigated.With the addition of sintering aids,0.8Na_(0.5)Bi_(0.51)TiO_(3)-0.2NaTaO_(3)could be co-fired with Ag at 910℃in air,and the low temperature co-fired ceramic(LTCC)capacitors maintain good temperature stability of permittivity and low dielectric loss in-100-352℃.Therefore,our work provides a new route for pre-paring ultra-wide operating temperature capacitors at low manufacturing costs.

关 键 词：Na_(1/2)Bi_(1/2)TiO_(3) PERMITTIVITY Dielectric loss Ultra-wide operating temperature capacitors 

分 类 号：TQ174.1[化学工程—陶瓷工业]