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首页> 外文会议>International symposium on Ionic and Mixed Conducting Ceramics >Resistance oscillations in perovskite proton conductors in water-containing atmospheres
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Resistance oscillations in perovskite proton conductors in water-containing atmospheres

机译：含水型大气中钙钛矿质子导体的电阻振荡

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摘要

Polycrystall inc perovskite ceramics, BaCe{sub}0.95Gd{sub}0.05O{sub}2.975 and BaZr{sub}0.95Y{sub}0.05O{sub}2.975, were fabricated by conventional solid state method, comprising calcination of precursor powders, and sintering of powder compacts. Resistance of the samples was measured by a 4-probe DC technique in dry air, dry nitrogen, as well as in wet nitrogen, over a range of temperatures between 650 and 900°C, with platinum or gold electrodes. In order to vary the partial pressure of water, the gas (air or nitrogen) was passed through a water bubbler, whose temperature was varied between 25 and 70°C. In humid atmospheres, the resistance was observed to oscillate with an oscillation period ranging between several minutes to couple of hours, and the amplitude of oscillation being between ～12% and ～70% of the baseline resistance. Resistance oscillations were observed when the bubbler temperature was typically greater than 25°C. The recorded oscillation patterns are presented. Possible origins of the oscillations are discussed.
机译：Polycrystall Inc Perovskite陶瓷，等0.95gd {sub} 0.050 {sub} 2.975和bazr {sub} 0.95y {sub} 0.050 {sub} 2.975由常规的固态方法制造，包括煅烧前体粉末和粉末压块的烧结。通过在干燥空气，干燥的氮气和湿法中的4探针DC技术在650至900℃的温度范围内，通过铂或金电极在干燥空气，干燥的氮气和湿氮中测量样品的电阻。为了改变水的分压，将气体（空气或氮气）通过水鼓泡器，其温度在25至70℃之间变化。在潮湿的气氛中，观察到阻力以振荡周期振荡，振荡周期在几分钟到几个小时之间，振幅在基线电阻的〜12％和〜70％之间。当鼓泡器温度通常大于25℃时，观察到电阻振荡。呈现了记录的振荡模式。讨论了振荡的可能起源。

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