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以TTB结构的NaSr_2Nb_5O15(NSN)为研究对象,采用常规固相烧结法合成的NSN和中间体(NaNbO3和SrNb_2O6)粉体作为基体,利用熔盐法合成大尺寸的NSN微晶作为晶种。通过原料设计,制备出致密的NSN陶瓷。研究了晶种含量对NSN陶瓷烧结行为和微观组织的影响。结果表明:在基体中加入晶种,通过反应烧结可以制备出致密的NSN陶瓷;随着晶种含量的增加,NSN陶瓷的微观组织结构发生明显变化。
Abstract：Ceramics with tetragonal tungsten bronze(TTB)-type structures undoped with sintering aids are difficult to densify due to the high anisotropy of their crystal structures. In this paper, TTB-structured NaSr_2Nb_5O15(NSN) was selected as the research object to prepare dense ceramics by the design of raw materials. Two powders synthesized by conventional solid-state sintering and molten salt methods were used. The former powder consisted of three phases as the matrix, NSN and intermediate phases(NaNbO3 and SrNb_2O6). The latter powder, with a large particle size, acted as a seed. The effects of seed content on the sintering behavior and microstructure of NSN ceramics were investigated. Dense NSN ceramics were prepared by reaction sintering using seed addition into the matrix. The seed content had an obvious influence on the microstructures of the NSN ceramics.
[1]LV X,ZHANG X,WU J.Nano-domains in lead-free piezoceramics:a review[J].J Mater Chem A,2020,8(20):10026-10073.
[2]WU H,ZHANG Y,WU J,et al.Microstructural origins of high piezoelectric performance:a pathway to practical lead-free materials[J].Adv Funct Mater,2019,29(33):1902911.
[3]HAO J,LI W,ZHAI J,et al.Progress in high-strain perovskite piezoelectric ceramics[J].Mat Sci Eng R,2019,135:1-57.
[4]LI H,LI R,WANG G,et al.Microwave-fabrication and properties of NKN based lead-free piezoelectric ceramics Co-doped with Ca O and B2O3[J].J Chin Ceram Soc,2020,48(9):1396-1404.
[5]WU J,XIAO D,ZHU J.Potassium-sodium niobate lead-free piezoelectric materials:past,present,and future of phase boundaries[J].Chem Rev,2015,115(7):2559.
[6]LI R,PU Y P,ZHANG Q W,et al.The relationship between enhanced dielectric property and structural distortion in Ca doped Ba2Na Nb5O15tungsten bronze ceramics[J].J Eur Ceram Soc,2020,40(13):4509-4516.
[7]XU S D,DENG Z,SHEN S J,et al.Structural and electrical effects of Ag substitution in tungsten bronze Sr2AgxNa1-xNb5O15 ceramics[J].Ceram Int,2020,46(9):13997-14004.
[8]HUO Z W,WANG H,XU J W,et al.Antiferroelectric behavior and giant strain in BNKT ceramics complex Cs2Nb4O11 tungsten bronze phase[J].Ceram Int,2020,46(8):10067-10074.
[9]CAO L,YUAN Y,TANG B,et al.Excellent thermal stability,high efficiency and high power density of (Sr0.7Ba0.3)(5)La Nb7Ti3O30-based tungsten bronze ceramics[J].J Eur Ceram Soc,2020,40(6):2366-2374.
[10]TAN Y,SHEN C,QIU T.Microwave dielectric properties of(Ba1-aSra)4.8(Sm0.7La0.3)8.8Ti18O54 ceramics[J].J Chin Ceram Soc,2009,37(6):911-915.
[11]ROTARU A,MORRISON F D.Structural,electrical and relaxor properties of Sc-In solid solution in tetragonal tungsten bronze ceramics[J].Ceram Int,2018,45(2):2710-2718.
[12]OCHOA D A,CASALS J A,VENET M,et al.Dielectric and piezoelectric nonlinear properties of slightly textured lead barium niobate ceramics[J].J Appl Phys,2019,125(2):024101.
[13]LIU L,GAO F,HU G,et al.Effect of excess Nb2O5 on the growth behavior of KSr2Nb5O15 particles by molten salt synthesis[J].Powder Technol,2013,235:806-813.
[14]LIU L,GAO F,HU G,et al.Fabrication of KSr2Nb5O15 particles with high aspect ratio by two-step molten salt synthesis[J].Adv Powder Technol,2014,25(1):219-225.
[15]YANG Z,WEI L,CHANG Y.Preparation and morphology of anisometric KSr 2Nb5O15 particles[J].J Eur Ceram Soc,2007,27(1):267-272.
[16]TORRES-PARDO A,JIMENEZ R,GONZALEZ-CALBET J M,et al.Structural effects behind the low temperature nonconventional relaxor behavior of the Sr2Na Nb5O15 bronze[J].Inorg Chem,2011,50(23):12091-12098.
[17]HAO S L,LI J H,YANG P,et al.Enhanced electrical properties and strong red light-emitting in Eu3+-doped Sr1.90Ca0.15Na0.9Nb5O15ceramics[J].J Am Ceram Soc,2017,100(12):5620-5628.
[18]WEI L,HAN X,LI Z,et al.Fabrication of textured Sr2Na0.9K0.1Nb5O15ceramics:anisotropy in structures and electrical properties[J].J Eur Ceram Soc,2012,32(14):3773-3780.
[19]FAN J,YANG B,WEI L,et al.B-cation effect on relaxor behavior and electric properties in Sr2Na Nb5xSbxO15 tungsten bronze ceramics[J].Ceram Int,2016,42(3):4054-4062.
[20]YANG P,LI L,HAO S,et al.Electrical and transparent properties induced by structural modulation in (Sr0.925Ca0.075)2.5-0.5xNaxNb5O15ceramics[J].J Eur Ceram Soc,2017,37(7):2605-2613.
[21]WEI L,YANG Z,GU R,et al.The phase formation,microstructure,and electric properties of tungsten bronze ferroelectric Sr2Na Nb5O15ceramics[J].J Am Ceram Soc,2010,93(7):1978-1983.
[22]LI L,YANG B,CHAO X L,et al.Effects of preparation method on the microstructure and electrical properties of tungsten bronze structure Sr2Na Nb5O15 ceramics[J].Ceram Int,2019,45(1):558-565.
[23]LIU L,GAO F,ZHANG Y,et al.Dense KSr2Nb5O15 ceramics with uniform grain size prepared by molten salt synthesis[J].J Alloy Compd,2014,616:293-299.
[24]ZHANG T H,LIU Y G,ZHAO J Q,et al.Influences of protective atmosphere on the characterization and properties of Na Sr2Nb5O15lead-free piezoelectric ceramics by sol-gel method[J].Bull Mater Sci,2015,38(6):1479-1486.
[25]YANG Y F,LIU Y Y,MENG J,et al.Preparation,structure and dielectric properties of (Ba1-xSrx)2Na Nb5O15 ceramics[J].J Alloy Compd,2008,453(1-2):401-406.
[26]LIU L,GAO F,HU G,et al.Microstructure and electrical properties of potassium strontium niobate (KSr2Nb5O15) ceramics[J].J Alloy Compd,2013,580:93-100.
[27]LIU L,GAO F,HU G,et al.Phase field simulation for the evolution of textured ceramics microstructure[J].2012,Ceram Int,38(7):5425-5432.
[28]SU S,ZUO R,LV D,et al.Densification and texture evolution of Bi4Ti3O12 templated Na0.5Bi0.5Ti O3-Ba Ti O3 ceramics:effects of excess Bi2O3[J].J Alloy Compd,2012,519:25-28.
[29]WEI L,YANG Z P,CHANG Y F,et al.Effect of seeding Sr2KNb5O15on the phase formation and microstructural development in reactive sintering of Sr2Na Nb5O15 ceramics[J].J Am Ceram Soc,2008,91(4):1077-1082.
[30]LIU L,GUO Z,WANG Y,et al.Synthesis and composition characterization of K0.5Na0.5Nb O3-KSr2Nb5O15 ceramics[J].Ceram-Silikaty,2018,62(3):274-278.
[31]LIU L,GAO F,HU G,et al.Preparation of single crystalline Na Sr2Nb5O15 particles with acicular morphology[J].Powder Technol,2013,246:395-397.
[32]LIU L,GAO F,LI J,et al.Molten salt synthesis of acicular sodium strontium niobate particles[J].Mat Sci Eng B-Solid,2013,178(20):1359-1364.
[33]ZHANG Y,LIU L.Phase field simulation of template growth process in textured ceramics[J].Model Simul Mater Sci,2017,26(1):015008.
[34]DESMOND K W,WEEKS E R.Influence of particle size distribution on random close packing of spheres[J].Phys Rev E,2014,90(2):022204.
[35]RODRIGUEZ-ORTEGA J,ESQUIVIAS L.Structural Models of Dense Gels[J].J Sol-Gel Sci Techn,1997,8(1-3):117-123.
[36]HERMES M,DIJKSTRA M.Jamming of polydisperse hard spheres:The effect of kinetic arrest[J].Europhys Lett,2010,89(3):6.
[37]HUDSON T S,HARROWELL P.Dense packings of hard spheres of different sizes based on filling interstices in uniform three-dimensional tilings[J].J Phys Chem B,112(27):8139.
[38]BROUWERS H J H.Erratum:Particle-size distribution and packing fraction of geometric random packings[Phys.Rev.E 74,031309(2006)][J].Phys Rev E,2006,74(6):1.
[39]CLUSEL M,CORWIN E I,SIEMENS A O N,et al.A'granocentric'model for random packing of jammed emulsions[J].Nature,2009,460(7255):611-615.
[40]LV R,LIU L,WANG Y,et al.A-site cation and morphology control of KSr2Nb5O15 microcrystalline by a modified molten salt method[J].Adv Powder Technol,2020,31(8):3256-3266.
[41]ZHANG C,GAO F,YAN X,et al.Effect of excess Sr2+on the microstructure and electrical Properties of KSr2Nb5O15 ceramics[J].2016,Ceram Int,42(1):242-250.
[42]SAID M,VELAYUTHAM T S,GAN W C,et al.The structural and electrical properties of SrxBa(1-x)Nb2O6 (SBN) ceramic with varied composition[J].Ceram Int,2015,41(5):7119-7124.
基本信息:
DOI：10.14062/j.issn.0454-5648.20200920
中图分类号:TQ174.1
引用信息:
[1]吕蕊,刘亮亮,王永强.四方钨青铜结构NaSr_2Nb_5O_(15)铁电陶瓷的致密化（英文）[J].硅酸盐学报,2021,49(09):1943-1951.DOI:10.14062/j.issn.0454-5648.20200920.
基金信息:
国家自然科学基金项目(51502191)资助
2021-07-30
2021-07-30
2021-07-30