La_(0.2)Ce_(0.8)Fe_xMn_(1-x)O_3催化剂的制备及其对甲烷燃烧的催化性能

采用溶胶-凝胶法制备了钙钛矿型催化剂La_(0.2)Ce_(0.8)Fe_xMn_(1-x)O_3(x=0.1,0.3,0.5,0.7,0.9),其结构和性能经SEM,XRD,BET和H_2-TPR表征。以甲烷燃烧为目标反应,研究了催化剂的性能。结果表明:单钙钛矿晶型催化剂La_(0.2)Ce_(0.8)Fe_(0.7)Mn_(0.3)O_3的比表面积为10.9 m~2·g~(-1),催化性能最好,起燃温度T10%为420℃,完全转化温度T90%为649℃。     

质子导体(Ce0.8La0.2)1－xCaxO2－δ 在合成氨中的应用

利用溶胶-凝胶法合成了萤石型稀土复合氧化物(Ce_0.8La_0.2)_1－xCa_xO_2－δ, 利用XRD、TEM和SEM对样品进行表征. 电化学方法研究表明, 合成样品在400～800 ℃温度范围内具有质子导电特性. 将(Ce_0.8La_0.2)_1－xCa_xO>_2－δ高温烧结体用于固态质子传导电池, 在常压下以氮气和氢气为原料合成氨气, 并确定了合成氨的适宜条件. 650 ℃时Ce_0.8La_0.2O_2－δ和(Ce_0.8La_0.2)_0.975Ca_0.025O_2－δ对应的氨产率分别达7.2×10^－9和7.5×10^－9 mol•s^－9•cm^－9.     

Sol-gel synthesis and electrical properties of ceria-based solid electrolytes

A series of solid electrolytes (Ce_(0.8)RE_(0.2))_(1-x)M_xO_(2-δ)(RE: Rare earth, M: Alkali earth) were prepared by sol-gel methods. XRD indicated that a pure fluorite phase was formed at 800℃. The synthesis temperature by the sol-gel methods was about 700℃ lower than by the traditional ceramic method. The electrical conductivity and impedance spectra were measured. XPS showed that the oxygen vacancy increased obviously by doping MO, thus, resulting in the increase of the oxygen ionic transport number and conductivity. The performance of ceria-based solid electrolyte was improved. The effects of RE_2O_3 and MO on the electrical properties were discussed. The conductivity and the oxygen ionic transport number of (Ce_(0.8)Sm_(0.2))_(1-0.05)Ca_(0.05)O_(2(?)δ) is 0.126 S·cm~(-1) and 0.99 at 800℃, respectively.     

多级孔La_(0.9)Ce_(0.1)Fe_(1-x)Co_xO_3的制备、表征及对CO+NO的催化活性

以三嵌段共聚物PEG-PPG-PEG (P123,M=5800)为软模板合成了6个多级孔钙钛矿型氧化物La_(0.9)Ce_(0.1)Fe_(1-x)Co_xO_3(x=0, 0.2, 0.4, 0.6, 0.8, 1.0),用XRD, SEM, BET, XPS对其进行表征,并测试了样品对CO+NO的催化活性。结果表明:在B位进行Co掺杂,催化剂的形貌及物化特性发生了显著变化。Co掺杂量在x=0.2时,样品La_(0.9)Ce_(0.1)Fe_(0.8)Co_(0.2)O_3的比表面积、孔容和表面B位金属含量最大,催化活性最佳,在反应温度为276, 242℃时分别对CO, NO的转化率达到90%。     

中温固体氧化物燃料电池高氧电催化活性BaCe_(0.5)Fe_(0.4)Co_(0.1)O_(3-δ)阴极材料的研制

以Ba(NO_3)_2, Ce(NO_3)_3·6H_2O, Fe(NO_3)_3·9H_2O, Co(NO_3)_2·6H_2O等为原料,通过EDTA-柠檬酸法合成出BaCe_(0.5)Fe_(0.4)Co_(0.1)O_(3-δ)(BCFC)阴极粉体,并制得烧结体,对BCFC粉体和烧结体的相组成,微观组织和氧还原过程等进行测试分析;以BCFC作阴极, Sm_(0.2)Ce_(0.8)O_(2-δ)(SDC)为电解质,NiO-SDC为阳极,组装对称电池和单电池,并进行电化学性能测试分析。实验结果表明:所合成的BCFC粉体原位产生BaCe_(0.15)Fe_(0.75)Co_(0.1)O_(3-δ)和BaCe_(0.85)Fe_(0.05)Co_(0.1)O_(3-δ)两相; BCFC在700℃时的表面氧交换系数(K_(chem))为3.8×10~(-4) cm·s~(-1)。对称电池在600℃的比表面电阻(ASR)为0.819Ω·cm~2,400 h长期性测试和10次热震循环试验后, ASR保持在1.6Ω·cm~2左右;单电池在700和650℃时的最大功率密度分别为290和204 mW·cm~(-2),对应的开路电压分别为0.80和0.82 V。初步研究结果表明BCFC应用于中温固体氧化物燃料电池具有良好的电化学性能和稳定性。     

铈、钇双掺杂钙钛矿型复合氧化物的合成及其在常压合成氨中的应用

采用溶胶 凝胶法合成了BaZr0.9Y0.1O3-δ(BZY),BaCe0.2Zr0.7Y0.1O3-δ(BCZY)固体电解质前驱体,并在1300℃烧结成致密陶瓷。采用热重差热分析(TG DTA),X射线衍射分析(XRD)及电镜测试(SEM,TEM)对样品进行了表征。并以烧结体样品为固体电解质、银钯作电极,测定了其在不同气氛和温度下的电导率。将该陶瓷用于固态质子传导电池中,在常压下以氮气和氢气为原料合成了氨气。结果表明,氨的比产率可达2.93×10-9mol·s-1·cm-2。     

Role of Microstructure and Spectrum Features on the Catalysis Effect of Ce_(1-x)(Nd_(0.5)Eu_(0.5))_xO_(2-δ) Solid Solutions

Nanosized Ce_(1-x)(Nd_(0.5)Eu_(0.5))xO_(2-δ) solid solutions(x = 0.00~0.20) were synthesized by means of hydrothermal method.Then the solid solutions were ball milled with Mg_2Ni and Ni powders for 20 h to get the Mg_2Ni–Ni–5 mol% Ce_(1-x)(Nd_(0.5)Eu_(0.5))xO_(2-δ) composites.The structures and spectrum characteristics of the Ce_(1-x)(Nd_(0.5)Eu_(0.5))xO_(2-δ) solid solutions catalysts were analyzed systemically.XRD results showed that the doped samples exhibited single phase of CeO_2 fluorite structure.The cell parameters and cell volumes were increased with increasing the doped content.Raman spectrum revealed that the peak position of F_(2g) mode shift to higher wavenumbers and the peak corresponding to oxygen vacancies were observed distinctly for the doped samples.UV-Vis technique indicated that the absorption peaks of Eu~(3+) and Nd~(3+) ions appeared; the bandgap energy was decreased linearly.The electrochemical and kinetic properties of the Mg_2Ni–Ni–5 mol% Ce_(1-x)(Nd_(0.5)Eu_(0.5))xO_(2-δ) composites were measured.The maximum discharge capacity was increased from 722.3 mA h/g for x = 0.00 to 819.7 mA h/g for x = 0.16,and the cycle stability S_(20) increased from 25.0%(x = 0.00) to 42.2%(x = 0.20).The kinetic measurement proved that the catalytic activity of composite surfaces and the hydrogen diffusion rate were improved for the composites with doped catalysts,especially for the composites with x = 0.16 and x = 0.20.The catalysis mechanism was analyzed from the point of microstructure and spectrum features of the Ce_(1-x)(Nd_(0.5)Eu_(0.5))xO_(2-δ) solid solutions.     

La 0.9 M 0.1 Ga 0.8 Mg 0.2 O 3 -α的中温质子导电性及其在常压合成氨中的应用

采用水热沉淀法制备了La0.9M0.1Ga0.8Mg0.2O3-α (M＝Ca2＋, Sr2＋, Ba2＋)陶瓷样品的前驱体, 沉淀剂来自尿素在水热条件下的水解产物. 前驱体经煅烧和烧结后得到陶瓷样品. XRD显示样品具有单一的斜方晶LaGaO3钙钛矿结构. 同位素效应和氢的电化学透过(氢泵)实验证明陶瓷样品具有质子导电性. 用AC阻抗谱法测定了样品在300～600 ℃、氢气气氛中的质子电导率, 其大小取决于La位掺杂的碱土金属离子: σ(M＝Sr2＋)＞σ(M＝Ba2＋)＞σ(M＝Ca2＋). 以La0.9M0.1Ga0.8Mg0.2O3-α为固体电解质进行了常压合成氨, 最佳合成温度为520 ℃. 当施加的电流密度为1 mA•cm－2、合成温度为520 ℃时, 氨产率分别为: 1.63×10–9 mol•s－1•cm－2 (M＝Ca2＋), 2.53×10－9 mol•s－1•cm－2 (M＝Sr2＋)和2.04× 10－9 mol•s－1•cm－2 (M＝Ba2＋).     

甲醇水蒸气重整制氢CuO/La_(1-x)Ce_xCrO_3催化剂

采用溶胶凝胶法制备了负载型CuO/La_(1-x)Ce_xCrO_3催化剂,研究了A位中Ce元素掺杂量对CuO/La_(1-x)Ce_xCrO_3催化剂结构、性质及其催化甲醇水蒸气重整制氢性能的影响。结果表明,掺杂Ce元素影响了CuO的还原性能和钙钛矿载体与CuO之间的作用力,进而影响了CuO/La_(1-x)Ce_xCrO_3催化剂对甲醇水蒸气重整制氢反应的催化性能。其中,CuO/La_(0.8)Ce_(0.2)CrO_3具有较好的催化性能,在280℃、水醇物质的量比为1.2、甲醇气体空速为800 h~(-1)的条件下,甲醇转化率达到100%。     

SmCo_(0.8)Fe_(0.2-x)Ni_xO_3(x=0,0.1,0.2)粉体在低温常压电化学合成氨中的阴极催化性能

用溶胶.凝胶法制备了Ce_(0.8)Sm_(0.2)O_(2-δ)(SDC)、SmCoO_3(SCO)和SmCo_(0.8)Fe_(0.2-x)Ni_xO_3(x=0,0.1,0.2)(SCFN)系列纳米粉体,用XRD、TEM等方法对所制的SCO和SCFN粉体进行了表征;以碳纸为支撑,Ni-SDC粉体为阳极材料,分别以SCO和SCFN系列粉体为阴极、Nafion膜为质子交换膜组成电化学合成氨电池,以湿氢气和湿氮气为原料进行电化学合成氨试验,在低温常压条件下,研究了SCO和SCFN系列粉体在电化学合成氨中的阴极电催化性能.结果表明,在低温常压电化学合成氨中,SCO和SCFN系列粉体均有阴极电催化性能,其中SmCo_(0.8)Fe_(0.1)Ni_(0.1)O_3的阴极电催化性能最好,在353K和0.5V条件下,电化学合成氨的速率达到8.01 ×10~(-9)mol/(s·cm~2).     

低温熔盐法制备球状多孔La_(1-x)Sr_xMn_(0.8)Fe_(0.2)O_3(0≤x≤0.6)及其催化CO氧化性能（英文）

汽车尾气中CO,HC,NO_x,硫化物及其颗粒粉尘严重危害人们身体健康和大气环境,是大气环境的主要污染源之一.目前,尾气净化是其减排的最主要方式.汽车尾气催化剂的发展经历了几代的研究,一直以来广泛采用Pt,Pd和Rh等贵金属,但因其资源匮乏,价格昂贵,容易被S和P中毒,因此人们逐渐将目光投向非贵金属催化剂的研发.钙钛矿复合氧化物因具有独特的物理化学性质以及灵活的"化学剪裁"特性而在材料研究等领域颇受青睐,有望成为贵金属催化剂的替代品.一般而言,催化剂的比表面积越大,表面活性位点越多,其催化活性越高,且会明显降低起燃温度.目前,一些制备工艺,如水热法、共沉淀法、微乳液法和硬模板法,虽可在一定程度上提高催化剂的比表面积,但却存在费时、耗能及制备工艺复杂等缺点.因此,如何简单有效地制备出大比表面积的钙钛矿型催化剂依然是一个难题.本文以合成的分级多孔δ-MnO_2微球为模板,采用熔盐法制备出球状多孔La_(1-x)Sr_xMn_(0.8)Fe_(0.2)O_3(0≤x≤0.6)钙钛矿氧化物,研究了球状多孔钙钛矿氧化物的形成过程和合适的制备温度,以及B位Fe_3+掺杂量为20%时A位Sr~(2+)掺杂量对钙钛矿催化剂结构和催化活性的影响.采用X射线粉末衍射、扫描电子显微镜、透射电子显微镜、N~2吸附-脱附、傅里叶红外光谱(FT-IR)和X射线能谱(XPS)等方法对催化剂进行了表征.在固定床石英管反应器上评价了催化剂催化CO氧化活性及稳定性,采用气相色谱联接氢火焰离子化检测器检测了产物和反应物的组成.结果表明,以分级多孔δ-MnO_2微球为模板,采用熔盐法在450oC反应4h制备出的球状多孔La_(1-x)Sr_xMn_(0.8)Fe_(0.2)O_3(0≤x≤0.6)钙钛矿氧化物具有良好的结晶性、较大的比表面积(55.73m~2/g)和孔体积(0.37cm~3/g).其球状多孔结构的形成可分为两个阶段:原位形成钙钛矿相和纳片表面析出钙钛矿晶粒及钙钛矿晶粒的再生长.另外,FT-IR光谱表明,Fe~(3+)和Sr~(2+)成功进入A,B位.同时,CO转化曲线表明,B位Fe~(3+)的掺杂量为20%时,A位Sr~(2+)的掺杂量高于30%时可以明显改善催化剂催化CO氧化活性:La_(1-x)Sr_xMn_(0.8)Fe_(0.2)O_3(0≤x≤0.3)的T_(50)和T_(90)分别在180和198℃左右;而La_(0.55)Sr_(0.45)Mn_(0.8)Fe_(0.2)O_3和La_(0.4)Sr_(0.6)Mn_(0.8)Fe_(0.2)O_3的T_(50)均低于125℃;La_(0.55)Sr_(0.45)Mn_(0.8)Fe_(0.2)O_3的T_(90)为181℃,而La_(0.4)Sr_(0.6)Mn_(0.8)Fe_(0.2)O_3却仍低于125℃.XPS结果则证明,较高的催化活性得益于La_(0.4)Sr_(0.6)Mn_(0.8)Fe_(0.2)O_3表面存在较多的Mn+、氧空位及吸附氧.最后,La_(0.55)Sr_(0.45)Mn_(0.8)Fe_(0.2)O_3和La_(0.4)Sr_(0.6)Mn_(0.8)Fe_(0.2)O_3的稳定性测试结果表明,采用熔盐法以δ-MnO_2为模板在450℃焙烧4h制备的多孔球状钙钛矿具有较好的催化稳定性.虽然催化剂制备工艺简单,周期短,但比表面积最大只有55.73m~2/g,为硬模板法的1/2,因此提高比表面积将是今后研究的方向.     

(La_(0.2)Pr_(0.8))_(0.7)Sr_(0.3)CoO_3/Nb-SrTiO_3异质结的光伏特性研究

利用固相反应法制备了稀土掺杂钙钛矿(La_(0.2)Pr_(0.8))_(0.7)Sr_(0.3)CoO_3靶材,并采用脉冲激光沉积(PLD)技术,在n型0.7%Nb-SrTiO_3(100)单晶衬底上制备了(La_(0.2)Pr_(0.8))_(0.7)Sr_(0.3)CoO_3薄膜样品。实验表明所形成的(La_(0.2)Pr_(0.8))_(0.7)Sr_(0.3)CoO_3/Nb-SrTiO_3异质结具有良好的整流特性和明显的光生伏特效应。在室温下,相同光强的调制脉冲激光激励下,波长为473 nm时,异质结产生的光生电压最大值为67 mV;波长532 nm时,光生电压最大值为33 mV。光生电压的最大值随着温度的降低而增加,而光生电压上升沿和下降沿的时间常数随着温度升高减小,分析表明这主要与异质结中热激发载流子浓度与迁移率有关。     

Ba1.03Ce0.8 Ho0.2O3-α固体电解质的制备和电性能

采用高温固相反应法制备了非化学计量组成的Ba1.03Ce0.8 Ho0.2O3-α 固体电解质,用XRD和SEM对其相组成和表面及断面形貌进行了表征。用气体浓差电池方法测定了材料在600～1000 ℃温度范围内,干燥空气、湿润空气和湿润氢气气氛中的离子迁移数;用交流阻抗谱技术测定了它们在各实验气氛中的电导率。研究了材料的离子导电特性,并与BaCe0.8Ho0.2O3-α 和Ba0.97Ce0.8Ho0.2O3-α 的性能进行了比较。结果表明：该材料为单相钙钛矿型斜方晶结构。在600～1000 ℃温度范围内、干燥空气中,是氧离子与电子空穴的混合导体,氧离子迁移数为0.10～0.36;在湿润空气中,是质子、氧离子与电子空穴的混合导体,质子迁移数为0.11～0.01,氧离子迁移数为0.34～0.30;在湿润氢气气氛中,是纯质子导体,质子迁移数为1。在600～1000 ℃温度范围内,干燥空气、湿润空气和湿润氢气气氛中,非化学计量组成材料(x = 1.03,0.97)的电导率高于化学计量组成材料(x = 1)的电导率,其中,Ba1.03Ce0.8 Ho0.2O3-α的电导率最高 (1000 ℃时、在干燥空气气氛中：3.92×10-2 S·cm-1;在湿润空气气氛中：3.46×10-2 S·cm-1;在湿润氢气气氛中：2.10×10-2 S·cm-1)。Ba1.03Ce0.8 Ho0.2O3-α材料的离子导电性优于BaCe0.8Ho0.2O3-α 和Ba0.97Ce0.8Ho0.2O3-α。     

Enhancing cathode performance for CO_2 electrolysis with Ce_(0.9)M_(0.1)O_(2-δ)(M=Fe,Co, Ni) catalysts in solid oxide electrolysis cell

Electrochemical conversion with solid oxide electrolysis cells is a promising technology for CO_2 utilization and simultaneously store renewable energy. In this work, Ce_(0.9)M_(0.1)O_(2-δ)(CeM, M=Fe, Co, Ni) catalysts are infiltrated into La_(0.6) Sr_(0.4) Cr_(0.5_ Fe_(0.5) O_(3-δ)–Gd_(0.2) Ce_(0.8) O_(2-δ)(LSCr Fe-GDC) cathode to enhance the electrochemical performance for CO2 electrolysis. Ce Co-LSCr Fe-GDC cell obtains the best performance with a current density of 0.652 A cm-2, followed by Ce Fe-LSCr Fe-GDC and Ce Ni-LSCr Fe-GDC cells with the value of 0.603 and 0.535 A cm~(-2), respectively, about 2.44, 2.26 and 2.01 times higher than that of the LSCr Fe-GDC cell at1.5 V and 800 °C. Electrochemical impedance spectra combined with distributions of relaxed times analysis shows that both CO_2 adsorption process and the dissociation of CO_2 at triple phase boundaries are accelerated by Ce M catalysts, while the latter is the key rate-determining step.     

BaCe_(0.8)Y_(0.2)O_(3-α)的溶胶-凝胶法合成及其电性能

用溶胶-凝胶法合成了BaCe_(0.8)Y_(0.2)O_(3-α)固体电解质前驱体，并以低 于通常固相反应150～250 ℃的温度（即1400～1500 ℃）进行了烧结。以烧结体样 品为固体电解质、多孔性铂为电极，组成氢及氧浓差电池、氢-空气燃料电池，测 定了BaCe_(0.8)Y_(0.2)O_(3-α)烧结体的质子和氧离子迁移数以及燃料电池的性 能，并与高温固相反应法合成的样品进行了比较。结果表明，烧结温度能显著影响 溶胶-凝胶法合成样品的质子迁移数及燃料电池性能。烧结温度≥ 1450 ℃时，质 子迁移数近似为1，燃料电池性能亦较高，烧结温度< 1450 ℃时，质子迁移数< 1 ，燃料电池性能亦较低。在1400～1500 ℃烧结的样品中，1450 ℃下烧结的样品具 有最高的电池性能，接近于高温固相反应法合成的样品。     

Direct synthesis of La-Mg-Ni-Co type hydrogen storage alloys from oxide mixtures

(La_(1-x)Mg_x)_2(Ni_(0.8)Co_(0.2))_7(x = 0.125, 0.25, 0.5) alloys were synthesized from the sintered mixture of La_2O_3+ Ni O + Co O + Mg O in the molten CaCl_2 electrolyte at 750 °C and the electrochemical hydrogen storage capacities of the synthesized alloys were measured. Non-hygroscopic LaNiO_3 phase formed during sintering(at 1200 °C for 2 h) as a result of the reaction of hygroscopic La_2O_3 with NiO. Another sinter product was Mg_(0.4)Ni_(0.6)O phase. Both mixed oxide sinter products facilitated the La-Ni and Mg-Ni phase formations. X-ray diffraction peaks indicated that the first stable phase appeared in the alloy structure was LaNi_5 which formed upon reduction of La_2NiO_4 phase. Increase in Mg content caused formation of La_(1.5)Mg_(0.5)Ni_7 phase in the alloy structure and the presence of this phase improved the hydrogen storage performance of the electrodes. It was observed that(La_(1-x)Mg_x)_2(Ni_(0.8)Co_(0.2))_7(x = 0.125, 0.25, 0.5) alloys have promising discharge capacities change between 319 m Ah/g and 379 m Ah/g depending on the alloy Mg content.     

镧系与二甘醇-二-(邻羟基苯基)醚配合物的合成与表征

本文合成14种镧系高氯酸盐及硝酸盐分别与二甘醇-二-(邻羟基苯基)醚(记为EO_2(HOP)_2,EO=ethylene oxide,HOP为邻羟基苯基)形成的新配合物,确证组成为Ln(ClO_4)_3·EO_2(HOP)_2·nH_2O(Ln:La-Eu,n=10,Ln:Gd,Dy-Tm,Y,n=7),La_3(NO_3)_9·(EO_2(HOP)_2)_2·3H_2O及La(ClO_4)_2·EO_2H(OP)_25H_2O。文中研究了配合物红外,紫外、~1HNMR谱及~(13)C纵向弛豫时间T_1等,并讨论了共存阴离子、溶剂及配体不同端基对成配的影响。     

阳离子型微乳液对锰(Ⅱ)-水杨基荧光酮的增敏作用

以阳离子型O/WCTMAB/n-C_5H_(11)OH/n-C_7H_(18)/H_2O微乳液为介质,进行Mn(Ⅱ)-SAF的光度法测定,ε_(575)=1.73×10~5L·mol~(-1)·cm~(-1),与以水为介质ε_(580)=6.59×10~4L·mol~(-1)·cm~(-1)及相同含量CTMABO/W胶束溶液为介质ε_(575)=1.20×10~5L·mol~(-1)·cm~(-1)比较,测定灵敏度显著增加,某些实验条件更为宽容,样品分析结果令人满意。     

BaCe_(0.8-x)Nb_xGd_(0.2)O_(3-δ)(0≤x≤0.45)的制备及性能研究

采用高温固相反应法制备了质子导体BaCe0.8-xNbxGd0.2O3-δ(0≤x≤0.45)。结合XRD、SEM、EIS等技术对其物相、微观形貌、稳定性及电导率进行了研究。结果表明,在1600℃烧结5h制备的质子导体BaCe0.8-xNbxGd0.2O3-δ(0≤x≤0.45)均能保持主相为斜方晶的钙钛矿结构。Nb的加入可明显提高烧结样品的致密性及在CO2和水蒸气气氛下的稳定性。在湿润H2/Ar(0.4%,V/V)气氛中800℃下,x=0.1样品的电导率为5.73mS·cm-1,电导活化能为0.35eV,与x=0的样品相当。     

Ce_(0.8)Sm_(0.2)O_(1.9)固体电解质的电子电导性研究

应用溶胶-凝胶法制备了Ce_(0.8)Sm_(0.2)O_(1.9)固体电解质粉体,通过X射线衍射对所制备的电解质粉体进行了物相分析。研究表明,Sm2O3已经固溶到CeO_2中形成了具有萤石结构CeO_2基固溶体。经成型并在1450℃下烧结2 h获得致密的Ce_(0.8)Sm_(0.2)O_(1.9)固体电解质。通过组装含有氧离子阻塞电极电池(-)致密Al2O3,Pt|Ce_(0.8)Sm_(0.2)O_(1.9)(SDC)固态电解质|Pt,O2(+)测试空气中不同温度下的电子电导。应用扫描电子显微镜观察所制备试样的微观组织形貌,结果表明:制备的电解质组织致密,高温粘合剂、电解质及刚玉坩埚结合紧密,保证了阻塞电极的气密性。采用Hebb-Wagner离子阻塞电极法测定了Ce_(0.8)Sm_(0.2)O_(1.9)在空气气氛下的电子导电性。结果显示:在测量温度范围内Ce_(0.8)Sm_(0.2)O_(1.9)固体电解质的电子电导率在1×10-8~1×10-6m S·cm-1之间,经计算得出活化能的平均值为0.9885 e V。