Status of the Electrostatic Levitation Furnace (ELF) in the ISS-KIBO

Tamaru, Haruka; Koyama, Chihiro; Saruwatari, Hideki; Nakamura, Yasuhiro; Ishikawa, Takehiko; Takada, Tetsuya

doi:10.1007/s12217-018-9631-8

Cited by 51 publications

(38 citation statements)

References 26 publications

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“…Because the correlation coefficients for dataset 1 were larger than those for dataset 2, the fitting results for the former are included in Table 1 Figure 4. The density of Al 2 O 3 at its T m (2327 K) was obtained using the ISS-ELF under the same conditions as in the present study, 10 while the values for Ga 2 O 3 (at 2123 K) 19 and B 2 O 3 (at 723 K) 20…”

Section: Accepted Articlementioning

confidence: 65%

“…In the case of electrostatic levitation, the Coulomb force between a charged sample and surrounding electrodes is used to control the sample position. Following the development of several key technologies necessary for stable sample positioning and scientific observations, [6][7][8][9] the Electrostatic Levitation Furnace (ELF) was installed in the International Space Station (ISS) 10 to allow the analysis of containerless materials under microgravity conditions. Because it is difficult to provide a sufficient charge to the majority of oxides such that these materials will levitate under the standard gravitational force, a microgravity environment provides an ideal opportunity to perform experiments.…”

Section: Introductionmentioning

confidence: 99%

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Densities of liquid lanthanoid sesquioxides measured with the electrostatic levitation furnace in the ISS

et al. 2021

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It can be very challenging to assess the thermophysical properties of melts at temperatures higher than 2000°C, due to chemical reactions between the molten samples and their containers. To overcome this problem, containerless techniques based on electromagnetic, 1,2 aerodynamic, 3,4 or electrostatic 5 levitation have been developed. In the case of electrostatic levitation, the Coulomb force between a charged sample and surrounding electrodes is used to control the sample position. Following the development of several key technologies necessary for stable sample positioning and scientific observations, [6][7][8][9] the Electrostatic Levitation Furnace (ELF) was installed in the International Space Station (ISS) 10 to allow the analysis of containerless materials under microgravity conditions. Because it is difficult to provide a sufficient charge to the majority of oxides such that these materials will levitate under the standard gravitational force, a microgravity environment provides an ideal opportunity to perform experiments. Thus, a combination of laser heating and thermophysical property measurements has been employed in conjunction with the ISS-ELF to determine the

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Section: Accepted Articlementioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Densities of liquid lanthanoid sesquioxides measured with the electrostatic levitation furnace in the ISS

et al. 2021

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“…using ADL [7], Tamaru et al. using ESL [12], Paradis et al. using ESL [13], and Kirshenbaum using the Archimedean method [14].…”

Section: Resultsmentioning

confidence: 99%

Density and viscosity of liquid ZrO2 measured by aerodynamic levitation technique

Kondo

Muta

Kurosaki

et al. 2019

Heliyon

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Liquid ZrO 2 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 ZrO 2 are scarcely reported. In particular, there are no experimental reports on the viscosity of liquid ZrO 2 . This is mainly due to the technical difficulties involved in the measurement of thermo-physical properties of liquid ZrO 2 , which has an extremely high melting point. To address this problem, an aerodynamic levitation technique was used in this study. The density of liquid ZrO 2 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 ZrO 2 at temperatures ranging from 2753 K to 3273 K, and 3170 K–3471 K, respectively, were successfully evaluated. The density of liquid ZrO 2 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 ZrO 2 was 13 mPa at its melting point.

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“…Most of the work on the application of electrostatic levitation to oxides was accomplished by the group at Tsukuba Space Center in Japan [31][32][33][34]. It culminated in the design of an electrostatic levitation furnace (ELF), which is currently in operation at the International Space Station [35]. The first results on the density of liquid Er 2 O 3 and Gd 2 O 3 were published in 2020 [36,37].…”

Section: Introductionmentioning

confidence: 99%

Measurements of Density of Liquid Oxides with an Aero-Acoustic Levitator

et al. 2021

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Densities of liquid oxide melts with melting temperatures above 2000 °C are required to establish mixing models in the liquid state for thermodynamic modeling and advanced additive manufacturing and laser welding of ceramics. Accurate measurements of molten rare earth oxide density were recently reported from experiments with an electrostatic levitator on board the International Space Station. In this work, we present an approach to terrestrial measurements of density and thermal expansion of liquid oxides from high-speed videography using an aero-acoustic levitator with laser heating and machine vision algorithms. The following density values for liquid oxides at melting temperature were obtained: Y2O3 4.6 ± 0.15; Yb2O3 8.4 ± 0.2; Zr0.9Y0.1O1.95 4.7 ± 0.2; Zr0.95Y0.05O1.975 4.9 ± 0.2; HfO2 8.2 ± 0.3 g/cm3. The accuracy of density and thermal expansion measurements can be improved by employing backlight illumination, spectropyrometry and a multi-emitter acoustic levitator.

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Status of the Electrostatic Levitation Furnace (ELF) in the ISS-KIBO

Cited by 51 publications

References 26 publications

Densities of liquid lanthanoid sesquioxides measured with the electrostatic levitation furnace in the ISS

Densities of liquid lanthanoid sesquioxides measured with the electrostatic levitation furnace in the ISS

Density and viscosity of liquid ZrO2 measured by aerodynamic levitation technique

Measurements of Density of Liquid Oxides with an Aero-Acoustic Levitator

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