Cited by 47Microwave-Assisted Synthesis and ApplicationsPlanetary Science and ExplorationMicrowave Dielectric Ceramics Synthesis

High-temperature microwave dielectric properties and processing of JSC-1AC lunar simulant

Allan, Shawn M., Merritt, Brandon J., Griffin, Brittany F., Hintze, Paul E., Shulman, Holly S.·2013·Journal of Aerospace Engineering

Abstract

Successful development of extraterrestrial microwave heating technologies depends on the study of the dielectric properties that control the microwave heating behavior of simulants and regoliths. Microwave heating may serve many lunar applications including heating the regolith for lunar surface dust stabilization, oxygen production, building materials, and mineral refinement. The dielectric properties (dielectric constant, ε′, and loss factor, ε″) of the lunar simulant, JSC-1AC, were measured at 2.45 GHz microwave frequency from room temperature to 1,100°C. The dielectric loss tangent and half-power depth were calculated from the measured properties. The loss tangent increased from a low value of 0.02 at room temperature to a high value of 0.31 at 1,100°C, indicating increased efficiency of microwave absorption at higher temperatures. The low temperature loss tangent indicated that relatively slow, low efficiency heating would be expected at room temperature. The microwave heating experiments confirmed weak heating related to absorption below 250°C, and increasingly strong absorption above 250°C, leading to rapid heating and melting or the so-called thermal runaway of JSC-1AC. Heating with microwaves as the only energy source produced a thermal runaway with wide variations in the JSC-1AC, such as fully molten glass, with unsintered loose particulate located millimeters away. The addition of a supplemental radiant heat source to the microwave mitigated the thermal runaway effect and produced uniform solid materials from the JSC-1A lunar simulant. The room temperature dielectric properties of JSC-1AC were measured and found to be comparable with the range of published lunar regolith properties, making JSC-1AC a reasonable starting point for microwave heating and computational modeling studies.

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Crossref · 10.1061/(asce)as.1943-5525.0000179

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  • A more uniform condensed structure was achieved by sintering JSC-1 Lunar simulant in a hybrid microwave furnace.

    “As illustrated in Fig. 17.b, a more uniform condensed structure was achieved by sintering the JSC-1 Lunar simulant in a hybrid microwave furnace.”
  • At the same microwave power, the heating speed accelerated to beyond 100/min.

    “At the same microwave power, the heating speed accelerated to beyond 100/min.”
  • Allan et al. observed low heating absorption below 250°C and progressively more significant absorption above 1100°C for JSC-1AC simulant at 2.45 GHz.

    “They observed low heating absorption below 250 ◦ C and a progressively more significant absorption above 1100 ◦ C.”

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Authors
Allan, S. M., Merritt, B. J., Griffin, B. F., Hintze, P. E., & Shulman, H. S.
Affiliations
  • Senior Material Engineer, Ceralink, Inc., 105 Jordan Rd., Troy, NY 12180 (corresponding author).
  • Alfred University (US)
  • Embry-Riddle Aeronautical University Prescott Arizona Campus (US)
  • Kennedy Space Center (US)
  • President and Chief Technical Officer, Ceralink, Inc., 105 Jordan Rd., Troy, NY 12180.
Venue
Journal of Aerospace Engineering
Published
2013-10
Volume
26
Issue
4
Pages
874-881
ISSN
  • 0893-1321 (ISSN-L)
  • 1943-5525
OpenAlex
W1998247299
Cited by
47
References
27
Citations by year
2026: 2 · 2025: 7 · 2024: 7 · 2023: 10 · 2022: 6 · 2021: 5 · 2020: 2 · 2019: 2 · 2018: 3 · 2017: 1 · 2016: 1 · 2012: 1
FWCI
0.15
Type
journal article
Language
en
Open access
closed
Locations
Journal of Aerospace Engineering (publishedVersion)
Topics
  • Physical Sciences › Chemistry › Organic Chemistry › Microwave-Assisted Synthesis and Applications
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Planetary Science and Exploration
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Microwave Dielectric Ceramics Synthesis
Keywords
lunar regolith, microwave heating, dielectric properties, loss tangent, thermal runaway, microwave absorption, radiant heat source, lunar oxygen production

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