Electroluminescence and the measurement of temperature during Stage III of flash sintering experiments
Electroluminescence and the measurement of temperature during Stage III of flash sintering experiments
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DOI：
10.1016/j.jeurceramsoc.2015.03.040
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发表时间：
2015-10
影响因子：
5.7
通讯作者：
Kalvis Terauds;J. Lebrun;Hyun Hwi Lee;T. Jeon;Sang-Hyeon Lee;J. Je;R. Raj
中科院分区：
文献类型：
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作者：
Kalvis Terauds;J. Lebrun;Hyun Hwi Lee;T. Jeon;Sang-Hyeon Lee;J. Je;R. Raj
研究了在闪光恒定状态（称为闪光烧结实验中的第三阶段）期间建立的陶瓷光学辉光。该状态下的试样温度是从浦项光源II的原位实验中获得的。样品温度的测量值与黑体辐射模型的预测值吻合得很好。从样品的光发射光谱测量从可见光到深红外，并与黑体辐射，将已预期从焦耳加热。结果表明，样品的发光是由激子的电子-空穴复合引起的。这种现象很可能与能斯特在世纪之交发现的相同。
The optical glow of ceramics that becomes established during the constant state of flash, known as Stage III in flash sintering experiments, is investigated. The specimen temperature in this state is obtained from in situ experiments at the Pohang Light Source II. The measurements of the specimen temperature agree very well with the predictions from the black body radiation model. The optical emission spectrum from the specimen is measured from the visible into the deep infrared, and compared with black body radiation that would have been expected from Joule heating. It is concluded that the specimens radiate by electroluminescence, which is ascribed to electron–hole recombination of excitons. The phenomenon is likely the same as discovered by Nernst at the turn of the twentieth century.