Density and viscosity of liquid ZrO2 measured by aerodynamic levitation technique
Density and viscosity of liquid ZrO2 measured by aerodynamic levitation technique
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DOI：
10.1016/j.heliyon.2019.e02049
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发表时间：
2019-07-01
期刊：
影响因子：
4
通讯作者：
Ohishi, Yuji
中科院分区：
文献类型：
--
作者：
Kondo, Toshiki;Muta, Hiroaki;Ohishi, Yuji
液态ZrO2是轻水反应堆严重事故分析中最重要的材料之一。液体ZrO2的物理性质虽然很重要，但很少有报道。特别是液体ZrO2的粘度，目前还没有实验报道。这主要是由于测量液体ZrO2的热物理性质存在技术困难，因为液体ZrO2具有极高的熔点。为了解决这个问题，在本研究中使用了空气动力学悬浮技术。液体ZrO2的密度由其质量和体积计算，并根据样品的记录图像估计。粘度是用液滴振荡技术测量的。在2753 K ~ 3273 K和3170 K ~ 3471 K的温度范围内，成功地测定了ZrO2液体的密度和粘度。在熔点为2988 K时，液体ZrO2的密度为4.7 g/cm(3)，随着温度的升高而线性降低，液体ZrO2的粘度为13 mPa。
Liquid ZrO2 is one of the most important materials involved in severe accident analysis of a light-water reactor. Despite its importance, the physical properties of liquid ZrO2 are scarcely reported. In particular, there are no experimental reports on the viscosity of liquid ZrO2. This is mainly due to the technical difficulties involved in the measurement of thermo-physical properties of liquid ZrO2, which has an extremely high melting point. To address this problem, an aerodynamic levitation technique was used in this study. The density of liquid ZrO2 was calculated from its mass and volume, estimated based on the recorded image of the sample. The viscosity was measured by a droplet oscillation technique. The density and viscosity of liquid ZrO2 at temperatures ranging from 2753 K to 3273 K, and 3170 K-3471 K, respectively, were successfully evaluated. The density of liquid ZrO2 was found to be 4.7 g/cm(3) at its melting point of 2988 K and decreased linearly with increasing temperature, and the viscosity of liquid ZrO2 was 13 mPa at its melting point.