Herein, we illustrate a feasible strategy to strengthen the gas sensing of Y-doped CaZrO₃ (Y_xCa_1−xZr_0.7O_3−δ (x = 0.05, 0.06, and 0.07))/0.1Co₃O₄ used as sensing materials. This compound was prepared via a solid-state reaction technique. The structural, morphological, electrical, and sensing features such as phase identification, microstructure, ionic conductivity, total conductivity and sensitivity of the fabricated sensors were evaluated via X-ray diffraction, scanning electron microscopy, electron-blocking method, electrochemical impedance spectroscopy and cyclic voltammetry. In addition, the influence of the Y-dopant on the properties of Y_xCa_1−xZr_0.7O_3−δ/Co₃O₄ was thoroughly studied. XRD results revealed the formation of the orthorhombic perovskite phase of Y_xCa_1−xZr_0.7O_3−δ. Moreover, the obtained results from the electrical properties elucidated high electronic and low ionic conductivities, and small polaron conduction of Y_xCa_1−xZr_0.7O_3−δ/Co₃O₄. Furthermore, the results confirmed an excellent limiting current plateau for the fabricated oxygen sensor based on Y_xCa_1−xZr_0.7O_3−δ/Co₃O₄. In particular, experimental observation indicates that Y-doping at the Ca site and/or Zr site might be difficult.

中文翻译：

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掺Y的CaZrO3 / Co3O4作为用于极限电流氧传感器的新型致密扩散阻挡材料。

在此，我们示出了可行的策略，以加强Y型掺杂CaZrO的气体传感₃（Y _X的Ca _{1- X}的Zr _0.7 ø _{3- δ}（X = 0.05，0.06，和0.07））/ 0.1Co ₃ ö ₄用作感应材料。该化合物通过固态反应技术制备。通过以下方式评估了所制造传感器的结构，形态，电学和传感特性，例如相识别，微结构，离子电导率，总电导率和灵敏度。X射线衍射，扫描电子显微镜，电子阻挡法，电化学阻抗谱和循环伏安法。另外，彻底研究了Y掺杂剂对Y _x Ca _{1- x} Zr _0.7 O _{3- δ} / Co ₃ O _{4性质的影响}。XRD结果表明Y _x Ca _{1− x} Zr _0.7 O _{3− δ}为正交晶钙钛矿相。而且，获得的结果是由于电学性质阐明了Y _x Ca的高电子和低离子电导率以及小的极化子传导_{1- x} Zr _0.7 O _{3- δ} / Co ₃ O ₄。此外，结果证实了基于Y _x Ca _{1- x} Zr _0.7 O _{3- δ} / Co ₃ O _4的氧传感器的极限电流平稳性极好。特别地，实验观察表明在Ca位点和/或Zr位点的Y掺杂可能是困难的。