High Performance Ammonia Sensor Based on Solid Electrolyte

基于固体电解质的高性能氨传感器

• 批准号: 09650905
• 负责人: IMANAKA Nobuhito
• 金额: $ 1.54万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650905/
• 关键词: Ammonia; Solid electrolyte; Gallate; Gallium; センサ; アンモニウム

The sensor output variation with the NH_3 content at 225ﾟC for the reference electrode (a) Pr_2(S0_4)_3・(NH_4) _2S0_4 and (b) Nd_2(S0_4)_3・(NH_4)_2S0_4, respectively, were measured.The operating temperature was set as the temperature where the sulfates applied in the reference electrode become anhydrous.The relation between the sensor output and the logarithm of ammonia gas pressure shows a straight line and the slope of the line exactly coincides with the slope calculated from the value obtained from the Nernst equation.If the concentration in the test gas atmosphere is exactly the same with the ammonia content in the reference electrode compartment, the sensor's output becomes zero.From the figure, the ammonia concentration in both the Pr_2(S0_4)_3・(NH_4)_2S0_4 and the Nd_2(S0_4)_3・(NH_4)_2S0_4 reference electrode compartment can be precisely estimated to be approximately 3 ppm.In conclusion, the compact NH_3 sensor composed of the NH_4^+ ion conducting solid electrolyte and the rare earth ammonium sulfate as the reference electrode was demonstrated to respond the NH_3 gas concentration exactly to the Nernst relation with continuous, rapid and reproducible responses.The outstanding feature of the sensor's quantitative NH_3 detection, contributes greatly to identifying the toxic ammonia gas leakage site as well as in situ monitoring of the ammonia content.

在225ﾟC下，参比电极(A)Pr2(SO4)3·(NH4)2SO4和(B)Nd2(SO4)3·(NH4)2SO4的传感器输出随NH3含量的变化。传感器的输出与氨气压力的对数呈直线关系，这条直线的斜率与根据能斯特方程计算的斜率完全一致。如果测试气体大气中的浓度与参比电极室中的氨含量完全相同，则传感器的输出为零。从图中可以看出，Pr_2(SO_4)_3·(NH_4)_2SO_4和ND_2(SO_4)_3·(NH_4)_2SO_4参比电极室中的氨浓度可精确估计为约3ppm。因此，由NH_4~+离子导电固体电解质和稀土硫酸铵作为参比电极组成的紧凑型NH_3传感器能够准确地响应NH_3气体浓度，具有连续、快速和可重复的响应。该传感器突出的特点是定量检测NH_3，对识别有毒氨气泄漏地点以及现场监测氨气含量有很大帮助。

项目成果

N.Imanaka, S.Tamura, and G.Adachi: "Ammonia Sensor Based on Ionically Exchanged NH_<4+>-Gallate Solid Electrolytes" Electrochem.and Solid-State Letters. Vol.1. 282-284 (1998)

N.Imanaka、S.Tamura 和 G.Adachi：“基于离子交换 NH_4>-没食子酸盐固体电解质的氨传感器”电化学和固态快报。

N.Imanaka et al.: "Ammonia Sensor Based on Ionically Exchanged NH_4^+-Gallate Solid Electrolytes" Electrochem and Solid-State Letters. 1. 282-284 (1998)

N.Imanaka 等人：“基于离子交换 NH_4^-没食子酸盐固体电解质的氨传感器”电化学和固态快报。

N.Imanaka et al.: "Ammonia Sensor Based on Ionically Exchanged NH_4^+-Gallate Solid Electrolytes" Electrochem.and Solid-State Letters. 1. 282-284 (1998)

N.Imanaka 等人：“基于离子交换 NH_4^-没食子酸盐固体电解质的氨传感器”Electrochem.and Solid-State Letters。

N.Imanaka et al.: "The effect of Ln_2(SO_4)_3・(NH_4)_2SO_4 solid reference electrode for high NH_3 sensing of ammonia sensor based on NH_4^+-Ga_<11>O_<17>" Kidorui. 158-159 (1997)

N.Imanaka 等人：“Ln_2(SO_4)_3·(NH_4)_2SO_4 固体参比电极对基于 NH_4^+-Ga_<11>O_<17> 的氨传感器高 NH_3 传感的影响”Kidorui 158-。 159 (1997)