氧化钠含量对硼铌酸盐体系玻璃陶瓷的结构、铁电和储能性能的影响  

Effect of Sodium Oxide Content on Structure,Ferroelectric Characteristics and Energy Storage Performances of Boro-niobate System Glass-ceramics

作　　者：冯先杰 陈国华[1,2] FENG Xianjie;CHEN Guohua(School of Material Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,Guangxi,China;Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,Guilin 541004,Guangxi,China)

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004 [2]桂林电子科技大学广西电子信息材料构效关系重点实验室,广西桂林541004

出　　处：《陶瓷学报》2024年第6期1154-1162,共9页Journal of Ceramics

基　　金：国家自然科学基金(52362001)。

摘　　要：采用传统高温熔融和后续可控析晶法制备了(33.5+x)Na_(2)O-33.5Nb_(2)O_5-33B_(2)O_(3)(以下称NN,x=0,2,4,6)玻璃陶瓷,系统探讨了不同x值对硼铌酸盐体系玻璃陶瓷的相结构、微观组织以及铁电和储能性能的影响。结果显示:所有硼铌酸盐体系玻璃陶瓷样品的主晶相均为钙钛矿结构的NaNbO_(3)。当x<4时,玻璃陶瓷样品伴随着第二相Na_(2)Nb_4O_(11)的出现。随着x值的增加,出现了NaNbO_(3)的反铁电P相到铁电Q相结构的转变。所有硼铌酸盐体系玻璃陶瓷表现为明显的铁电特征。当x=4时玻璃陶瓷样品的介电常数达153,且获得1205.81 kV·cm^(-1)的较高击穿强度。其在800 kV·cm^(-1)场强下玻璃陶瓷样品的可恢复储能密度W_(rec)达0.81 J·cm^(-3),在600 kV·cm^(-1)场强下的瞬时放电功率密度W_d为145.87 MW·cm^(-3)。该硼铌酸盐体系玻璃陶瓷有望用于脉冲功率系统。(33.5+x)Na2O-33.5Nb_(2)O_(5)-33B_(2)O_(3)(Abbreviated as NN,x=0,2,4,6)glass-ceramics were fabricated using the conventional high-temperature melting technique followed by a controlled crystallization process.The impact of varying x values on the phase composition,microstructure,ferroelectric characteristics,and energy storage capabilities of boro-niobate glass-ceramics was comprehensively investigated.The findings reveal that the predominant crystal phase of all boro-niobate glass-ceramic samples is NaNbO_(3) with perovskite structure.When x is less than 4,the second phase Na_(2)Nb_(4)O_(11) appears concomitantly in the glass-ceramics.With the increase of x value,the structure of NaNbO_(3) antiferroelectric P phase changes to ferroelectric Q phase.All boro-niobate glass-ceramics exhibit obvious ferroelectric characteristics.When x=4,the dielectric constant of the glass-ceramic sample reaches 153,and a higher breakdown strength of 1205.81 kV·cm^(-1) is obtained,and the Received date:2024-08-06.Revised date:2024-09-23.Correspondent author:CHEN Guohua(1964-),Male,Ph.D.,Professor.E-mail:[e-mail] recoverable energy storage density(Wrec)of 0.81 J·cm^(-3) when 800 kV·cm^(-1) field strength was applied,the instantaneous discharge power density(Wd)at 600 kV·cm^(-1) field strength is 145.87 MW·cm^(-3).The boro-niobate system glass ceramics are expected to be used in pulse power systems.

关 键 词：铌酸钠 玻璃陶瓷 储能密度 击穿强度 

分 类 号：TQ174.75[化学工程—陶瓷工业]