CO2 sensor based on a solid state oxygen concentration cell

被引：28

作者：

Näfe, H ^{[1
]}

Aldinger, F ^{[1
]}

机构：

[1] Max Planck Inst Met Forsch, Pulvermet Lab, D-70569 Stuttgart, Germany

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2000年 / 69卷 / 1-2期

关键词：

CO2; sensor; solid state oxygen concentration cell; yttria stabilized zirconia;

D O I：

10.1016/S0925-4005(00)00333-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A potentiometric CO2 sensor based on a solid-state oxygen concentration cell is described, which comprises yttria stabilized zirconia (YSZ) as solid electrolyte and sodium carbonate as CO2 sensitive phase. The necessary transformation of the sodium chemical potential into the corresponding oxygen potential is achieved by employing a gas-tight membrane of an electronically short-circuited phase mixture of Na-(beta + beta ")-Al2O3 as an interlayer between zirconia and sodium carbonate, The sensor signal is stable and reproducible during long-term operation. Further improvement of the sensor behaviour appears to be feasible by maximizing the buffer capacity of the Na-beta/Na-beta "-Al2O3 phase equilibrium. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：46 / 50

页数：5

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