Fast response of resistive-type oxygen gas sensors based on nano-sized ceria powder
Fast response of resistive-type oxygen gas sensors based on nano-sized ceria powder
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DOI：
10.1016/s0925-4005(03)00167-9
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发表时间：
2003-08-01
影响因子：
8.4
通讯作者：
Murayama, N
中科院分区：
文献类型：
--
作者：
Izu, N;Shin, W;Murayama, N
以雾化热解法制备的100 nm粉末为原料，采用丝网印刷法在氧化铝衬底上制备了平均粒径为100 nm的CeO2多孔厚膜氧气敏元件。比较了氧分压从10(5)~10(3)Pa时传感器与使用较大粒径(200和2000 nm)薄膜的传感器的响应。此外，通过氧分压的周期性变化来评估它们的快速响应(在小于8 S)。在888K下，当氧分压从10(5)~10(3)Pa时，100 nm的传感器对氧分压下降的响应时间比200 nm和2000 nm的响应时间短。从氧分压周期变化法得到的结果可以看出，100 nm粒子传感器在1073K和1173K时的响应时间分别小于1和0.25 S。CeO_2厚膜氧敏元件的响应时间可以通过减小厚膜的颗粒尺寸来减小。(C)2003 Elsevier Science B.V.保留所有权利。
The oxygen gas sensors based on cerium oxide porous thick film with the average particle size of 100 nm were fabricated by screen-printing method on alumina substrate using the powder of 100 nm prepared by mist pyrolysis. The sensor's response to the oxygen partial pressure drop from 10(5) to 10(3) Pa was compared with that of the sensors using films of larger particle sizes (200 and 2000 nm). Further, their fast response (in less than 8 s) was evaluated by periodic variation of oxygen partial pressure. The response time of sensors with the particle size of 100 nm was shorter than that of 200 and 2000 nm to the oxygen partial pressure drop from 10(5) to 10(3) Pa at 888 K. From the results obtained by the method of periodic variation of oxygen partial pressure, it became clear that the response times for the 100 nm particle sensor were less than 1 and 0.25 s at 1073 and 1173 K, respectively. Response time of oxygen gas sensor based on cerium oxide thick film could be reduced by decreasing the particle size of the thick film. (C) 2003 Elsevier Science B.V. All rights reserved.