纳米钆掺杂氧化铈(Ce0.8Gd0.2O3-δ)用于氧传感器和固体氧化物燃料电池

2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1) Pub Date : 2012-03-07 DOI:10.1109/ISPTS.2012.6260893

Shrikant G. Kulkarni, G. Phatak, P. Ramesh, S. Duttagupta

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引用次数: 5

摘要

钆掺杂铈(GDC)是已知的中温氧离子导体。这是一项初步的工作，旨在探索使用纳米晶GDC作为氧传感器在中等工作温度范围(500°C - 700°C)的适用性。以EDTA为螯合剂，采用溶胶-凝胶法制备了纳米钆掺杂氧化铈(GDC)。在600℃下煅烧得到的颗粒尺寸约为10±5nm。用该材料制备的球团经1350℃烧结，其密度达到理论密度的90%。在200-600°C和500-700°C的温度范围内分别测量了这些颗粒的直流和交流(1Hz-1MHz)电导率。在700°C时，最高电导率为4.61X10−5 S/cm。讨论了低电导率的可能原因。

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Nanocrystalline Gadolinium doped Ceria (Ce0.8Gd0.2O3-δ) for oxygen sensor and solid oxide fuel cell applications

Gadolinium doped Ceria (GDC) is a known oxygen ion conductor in intermediate temperature range. This is a preliminary work aimed at exploring the suitability of using nanocrystalline GDC as oxygen sensor in intermediate operating temperature range (500°C–700°C). The nanocrystalline Gadolinium doped Ceria (GDC) has been prepared by sol-gel method with EDTA as chelating agent. Particle size around 10±5nm was obtained after calcination at 600°C. Pellets prepared using this material were sintered 1350°C, which show 90% of the theoretical density. The dc and ac (1Hz–1MHz) conductivity of these pellet was measured in the temperature range 200–600°C and 500–700°C respectively. Highest conductivity of the order of 4.61X10⁻⁵ S/cm was recorded at 700°C. Possible reasons for low conductivity are discussed.

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2012 1st International Symposium on Physics and Technology of Sensors (ISPTS-1)

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