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首页> 外文会议>Fourth International Symposium on Ionic and Mixed Conducting Ceramics, null >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：含水大气中钙钛矿质子导体的电阻振荡

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摘要

Polycrystalline perovskite ceramics, BaCe_(0.95)Gd_(0.05)O_(2.975) and BaZr_(0.95)Y_(0.05)O_(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℃, 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℃. 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 ～2% and ～70% of the baseline resistance. Resistance oscillations were observed when the bubbler temperature was typically greater than 25℃. The recorded oscillation patterns are presented. Possible origins of the oscillations are discussed.
机译：通过传统的固态方法，包括前体粉末的煅烧和粉末压块的烧结，制备了多晶钙钛矿陶瓷BaCe_（0.95）Gd_（0.05）O_（2.975）和BaZr_（0.95）Y_（0.05）O_（2.975）。样品的电阻通过4探针DC技术在650至900℃的温度范围内的干燥空气，干燥氮气以及湿氮气中使用铂或金电极测量。为了改变水的分压，使气体（空气或氮气）通过水鼓泡器，水鼓泡器的温度在25至70℃之间变化。在潮湿的大气中，观察到电阻在几分钟到几小时之间波动，振荡幅度为基线电阻的〜2％至〜70％。当起泡器温度通常高于25℃时，观察到电阻振荡。显示了记录的振荡模式。讨论了振荡的可能来源。

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