Surface temperature of zirconia is measured during flash sintering using thermal imaging camera. The results reveal that in the steady stage the temperature along the longitude of electric field is uneven: the temperature at the end of gauge section close to the anode is much higher than that close to the cathode; and the highest temperature locates at the three-quarter of the length of gauge section from the cathode. We further demonstrate that the asymmetric temperature distribution is related to the flashing since temperature distribution in the specimen without flashing is symmetric. The possible mechanisms that resulted in the asymmetric distribution are discussed.

中文翻译：

---

快速烧结致密氧化锆稳态阶段的温度分布不对称

氧化锆的表面温度是使用热像仪在闪光烧结过程中测量的。结果表明，在稳态阶段，沿电场经度的温度是不均匀的：在应变计末端靠近阳极的温度比靠近阴极的温度高得多。最高温度位于距阴极标距段长度的四分之三处。我们进一步证明了不对称温度分布与闪烁有关，因为没有闪烁的样品中的温度分布是对称的。讨论了导致不对称分布的可能机制。