Resistive oxygen gas sensors based on CeO2 fine powder prepared using mist pyrolysis
Resistive oxygen gas sensors based on CeO2 fine powder prepared using mist pyrolysis
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DOI：
10.1016/s0925-4005(02)00224-1
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发表时间：
2002-11-15
影响因子：
8.4
通讯作者：
Kanzaki, S
中科院分区：
文献类型：
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作者：
Izu, N;Shin, W;Kanzaki, S
采用雾化热解法制备了CeO2微粉。平均粒径为200 nm。以该粉末为原料，采用丝网印刷工艺，在1473K空气中焙烧2 h，制得了多孔厚膜阻性氧气敏元件。烧成厚膜的微观结构为颈状长大，无明显的晶粒长大，为无规网状氧化铈粉末。在873-973 K(C)2002 Elsevier Science B.V.的温度范围内，在氧分压P(O-2)从10(5)到10(3)Pa时，平均颗粒尺寸为200 nm的氧气传感器的响应时间(t(90))比那些颗粒为2000 nm的氧气传感器的响应时间(t(90))长十分之一。
Mist pyrolysis was used to prepare cerium oxide (CeO2) fine powder. The average particle size was 200 nm. Using the powder, resistive oxygen gas sensors based on porous thick films were fabricated by screen printing and firing at 1473 K for 2 h in air. The microstructure of the fired thick film showed the neck growth and the random network structure of cerium oxide powder with no significant grain growth. The response time (t(90)) for oxygen gas sensors having an average particle size of 200 nm was one-tenth as long as that for those with 2000 nm particles after a sudden change of oxygen partial pressure, P(O-2), from 10(5) to 10(3) Pa in the temperature range of 873-973 K. (C) 2002 Elsevier Science B.V. All rights reserved.