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Preparation and electrical property of CaZr0.7M0.3O3 (M = Fe, Cr and Co) dense diffusion barrier for application in limiting current oxygen sensor
Sensors and Actuators B: Chemical ( IF 8.0 ) Pub Date : 2018-03-17 , DOI: 10.1016/j.snb.2018.03.097
Xiangnan Wang , Tao Liu , Jingkun Yu , Yangcheng Mo , Maoyi Yi , Jingyun Li , Lin Li

(M = Fe, Cr and Co) doped CaZrO3, CaZr0.7M0.3O3 (M = Fe, Cr and Co), was synthesized by solid state reaction method. Crystalline structure, microstructures, electronic conductivity, total conductivity and sensing performance were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Hebb-Wagner, DC van der Pauw and voltammetry method, respectively. XRD measurements show that the CaZr0.7M0.3O3 (M = Fe, Cr and Co) samples belong to an orthorhombic perovskite structure. SEM measurements show that the CaZr0.7M0.3O3 (M = Fe, Cr and Co) samples have fine grains with average grain size of 0.5–2 μm. Electrical property measurements show that the CaZr0.7Fe0.3O3 and CaZr0.7Cr0.3O3 samples have the highest electronic conductivity and total conductivity in air, respectively. Sensing performance measurements show that limiting current-type oxygen sensors with 9YSZ solid electrolyte and CaZr0.7M0.3O3 dense diffusion barrier exhibit good limiting current (IL) plateau. Log IL depends linearly on 1000/T. IL depends linearly on oxygen partial pressure.



中文翻译:

CaZr 0.7 M 0.3 O 3(M = Fe,Cr和Co)致密扩散阻挡层的制备和电性能,用于极限电流氧传感器

(M = Fe,Cr和Co)掺杂的CaZrO 3,通过固相反应法合成了CaZr 0.7 M 0.3 O 3(M = Fe,Cr和Co)。分别通过X射线衍射(XRD),扫描电子显微镜(SEM),Hebb-Wagner,DC van der Pauw和伏安法对晶体结构,微观结构,电导率,总电导率和感测性能进行了表征。XRD测量表明,CaZr 0.7 M 0.3 O 3(M = Fe,Cr和Co)样品属于正交晶钙钛矿结构。扫描电镜测量表明CaZr 0.7 M 0.3 O 3(M = Fe,Cr和Co)样品具有细晶粒,平均晶粒尺寸为0.5–2μm。电性能测量表明,CaZr 0.7 Fe 0.3 O 3和CaZr 0.7 Cr 0.3 O 3样品分别在空气中具有最高的电子电导率和总电导率。感测性能的测量表明,与9YSZ固体电解质和CaZr极限电流型氧传感器0.7中号0.3 ö 3密扩散阻挡显示了良好的极限电流(大号)高原。日志大号线性依赖于1000 / Ť一世L线性地取决于氧分压。

更新日期:2018-03-17
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