陈婷;胡晓博;谢志翔;张筱君;邵晴;江伟辉;

• 1:景德镇陶瓷大学
• 2:国家日用及建筑陶瓷工程技术研究中心

摘要(Abstract)：

Ca_3Co_2O_6是一种常用的热电材料,但是其透氧性能则少有人关注。以Ca(NO_3)_2·4H_2O和Co(NO_3)_2·6H_2O为原料,采用柠檬酸络合法制备了纯相Ca_3Co_2O_6材料,系统分析了煅烧温度和保温时间对合成Ca_3Co_2O_6的影响。样品烧结致密化后,通过四端引线法和气相色谱装置分别考察了它的电导率和透氧率。实验结果表明,热处理温度为900℃,保温2 h可以获得纯相的Ca_3Co_2O_6粉体,粉体的形貌为蠕虫状。提高热处理温度和延长保温时间,样品的结晶度随之提高,晶粒尺寸也随之长大。样品经烧结后获得致密膜片,950℃时电导率可达11.95 S·m^(-1)。Ca_3Co_2O_6具有一定氧渗透能力,950℃时透氧率为7.36×10(-1)。Ca_3Co_2O_6具有一定氧渗透能力,950℃时透氧率为7.36×10^(-8) mol·cm(-8) mol·cm^(-2)·s(-2)·s^(-1),有望作为一种新型的混合导体用于纯氧的制备。

关键词(KeyWords)： 溶胶-凝胶法;柠檬酸;透氧;电导率

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51402135,51402136);; 江西省科技计划项目(20151BBE50015);; 江西省教育厅基金(GJJ150919,GJJ150935)

作者(Authors): 陈婷;胡晓博;谢志翔;张筱君;邵晴;江伟辉;

DOI: 10.16521/j.cnki.issn.1001-9642.2017.09.004

参考文献(References)：

• [1]Meng X.X.,Sunarsob J.,Jin Y.,et al.Robust CO2 and H2resistant triple-layered(Ag-YSZ)/YSZ/(La0.8Sr0.2MnO 3-δ-YSZ)hollow fiber membranes with short-circuit for oxygen permeation[J].J.Membr.Sci.,2017,524:596-603.
• [2]Ovtar S.,Gurauskis J.,Haugen A.B.,et al.Oxygen transport properties of tubular Ce0.9Gd0.1O1.95-La0.6Sr0.4FeO 3-δcomposite asymmetric oxygen permeation membranes supported on magnesium oxide[J].J.Membr.Sci.,2017,523:576-587.
• [3]Cai L.L.,Li W.P.,Cao Z.W.,et al.Improving oxygen permeation of MIEC membrane reactor by enhancing the electronic conductivity under intermediate-low oxygen partial pressures[J].J.Membr.Sci.,2016,520:607-615.
• [4]陈婷,赵海雷,谢志翔,等.双相致密透氧膜[J].化学进展,2012,24:163-172.
• [5]Pena-Martinez J.,Marrero-Lopez D.,Ruiz-Morales J.C.,et al.On Ba0.5Sr0.5Co1-yFeyO 3-δ(y=0.1-0.9)oxides as cathode materials for La0.9Sr0.1Ga0.8Mg0.2O2.85 based IT-SOFCs[J].Int.J.Hydrogen Energy,2009,34:9486-9495.
• [6]Twraoka Y.,Zhuang H.M.,Furukawa S.,et al.Oxygen permeation through perovskite-type oxides[J].Chem.Lett.,1985,14:1743-1746.
• [7]Tai L.W.,Nasrallah M.M.,Anderson H.U.,et al.Structure and electrical properties of La1-xSrxCo1-yFeyO3.Part 2.The system La1-xSrxCo0.2Fe0.8O3[J].Solid State Ionics,1995,76:273-283.
• [8]Chen C.S.,Kruidhof H.,Bouwmeester H.J.M.,et al.Oxygen permeation through oxygen ion oxidenoble metal dual phase composites[J].Solid State Ionics,1996,86-88:569-572.
• [9]Zhu X.F.,Wang H.H.,Yang W.S.Relationship between homogeneity and oxygen permeability of composite membranes[J].J.Membr.Sci.,2008,309:120-127.
• [10]Chen T.,Zhao H.L.,Xie Z.X.,et al.Ce0.8Sm0.2O2-δ-Pr Ba Co2O5+δdual-phase membrane:novel preparation and improved oxygen permeability[J].J.Power Sources,2013,223:289-292.
• [11]Liao Q.,Wang Y.J.,Chen Y.,et al.Novel cobalt-free tantalum-doped perovskite Ba Fe1-yTay O3-δwith high oxygen permeation[J].Chin.J.Chem.Eng.,2016,24:339-344.
• [12]Balaguer M.,Escolástico S.,Serra J.M.Oxygen permeation and stability of Ca Ti0.73Fe0.18Mg0.09O3-δoxygen-transport membrane[J].J.Membr.Sci.,2017,524:56-63.
• [13]Polfus J.M.,Xing W.,Pe anac G.,e t a l.Oxygen permeation and creep behavior of Ca1-xSrxTi0.6Fe0.15Mn0.25O3-δ(x=0,0.5)membrane materials[J].J.Membr.Sci.,2016,499:172-178.
• [14]Yeyongchaiwat J.,Matsumoto H.,Ishihara T.Oxidative reforming of propane with oxygen permeating membrane reactor using Pr2Ni0.75Cu0.25Ga0.05O4 perovskite related mixed conductor[J].Solid State Ionics,2017,301:23-27.
• [15]Sedmidubsk D.,Jake V.,Jankovsk O.,et al.Phase equilibria in Ca-Co-O system[J].J.Solid State Chem.,2012,194:199-205.
• [16]Senthilkumar M.,Vijayaraghavan R.Hightemperature resistivity and thermoelectric properties of coupled substituted Ca3Co2O6[J].Sci.Technol.Adv.Mater.,2009,10:015007(5pp).
• [17]Wei T.,Huang Y.H.,Zeng R.,et al.Evaluation of Ca3Co2O6 as cathode material for high-performance solidoxide fuel cell[J].Sci.Rep.,2013,3:1125-1130.
• [18]Jin J.,Wang Y.,Zhu C.,et al.Preparation and characterization of Ca3Co2O6 as cathode for intermediate temperature solid oxide fuel cells[J].Mater.Lett.,2017,187:53-55.
• [19]Chen T.,Zhao H.L.,Xie Z.X.,et al.Oxygen permeability of Ce0.8Sm0.2O2-δ-LnBaCo2O5+δ(Ln=La,Nd,Sm,and Y)dual-phase ceramic membranes[J].Ionics,2015,21:1683-1692.
• [20]张艳峰.柠檬酸溶胶-凝胶法制备Ca3Co2O6粉体及表征[J].河北师范大学学报,2006,30:315-317.
• [21]刘涛,曾令可,漆小玲,等.Ca3Co2O6热电材料的柠檬酸溶胶-凝胶法制备与表征[J].中国陶瓷,2008,44:32-35.