Solid electrolyte type ammonia gas sensor based on trivalent aluminum ion conducting solids
Solid electrolyte type ammonia gas sensor based on trivalent aluminum ion conducting solids
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DOI：
10.1016/j.snb.2010.03.093
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发表时间：
2010-06
影响因子：
8.4
通讯作者：
Tsukasa Nagai;S. Tamura;N. Imanaka
中科院分区：
文献类型：
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作者：
Tsukasa Nagai;S. Tamura;N. Imanaka
采用三价铝离子导电（Al 0. 2 Zr 0. 8）20/19 Nb（PO 4）3固体电解质，以铝膜为参比电极，制备了氨气敏传感器。从热稳定性或水稳定性的角度考虑，采用双硫酸镨铵Pr 2（SO 4）3·（NH 4）2SO 4或（NH 4）2 HPO 4掺杂的La 2 O2 SO 4固溶体0.7La2O2SO4-0.3（NH 4）2 HPO 4作为辅助传感电极材料。以Pr_2（SO_4）_3·（NH_4）_2SO_4为基质的传感器响应迅速，以0.7La_2O_2SO_4 -0.3（NH_4）_2HPO_4为基质的传感器即使在潮湿环境中也能达到理论响应。由于采用Al 3+离子导体的现有传感器显示出对水的快速响应或高耐久性的高传感性能，因此极大地期望其成为实用的NH3气体传感器。
Ammonia gas sensors were fabricated by using trivalent aluminum ion conducting (Al0.2Zr0.8)20/19Nb(PO4)3solid electrolyte with aluminum metal film as a reference electrode. As the auxiliary sensing electrode material, praseodymium ammonium double sulfate Pr2(SO4)3·(NH4)2SO4or (NH4)2HPO4doped La2O2SO4solid solution, 0.7La2O2SO4–0.3(NH4)2HPO4, was applied from the view points of thermal stability or water durability. The former sensor with Pr2(SO4)3·(NH4)2SO4showed a rapid response and the latter one with 0.7La2O2SO4–0.3(NH4)2HPO4exhibited a theoretical response even in a humid atmosphere. Since the present sensors applying Al3+ion conductor showed such a high sensing performance of rapid response or high durability for water, it is greatly expected to be practical NH3gas sensors.