TY - GEN
T1 - PMMA Nanocomposite Based Cryogenic Dielectrics for High-Temperature Superconducting (HTS) Cables
AU - Cook, Jordan
AU - Mahon, Jacob
AU - Emmerling, William
AU - Yu, Lei
AU - Krchnavek, Robert R.
AU - Xue, Wei
N1 - Funding Information:
This work was supported by the Department of Defense (DoD) under the Naval Engineering Education Consortium (NEEC) with the grant number NSWC IHEODTD N00174-17-1-0008 and in part by the National Science Foundation (NSF) with the grant number CBET #1625816.
Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - High-temperature superconducting (HTS) cable systems delaminate at 175°C, necessitating a low processing temperature dielectric coating. A polymer nanocomposite can be prepared at temperatures below the HTS cable delamination temperature, mitigating this issue. The proposed polymer nanocomposite was composed of polymethyl methacrylate (PMMA) and impregnated with silicon dioxide (SiO2) to improve the dielectric performance of the base polymer. Dielectric breakdown testing shows a significant increase in the dielectric strength of PMMA/SiO2 composites at cryogenic temperatures when compared to room temperature testing. The increase is most significant across higher filler concentrations where the dielectric strength more than triples over room temperature values from 60-90 kV/mm to 290 kV/mm. The impact a colder testing environment has on dielectric performance makes PMMA/SiO2 nanocomposites a promising low temperature processing dielectric for adoption into HTS cable systems.
AB - High-temperature superconducting (HTS) cable systems delaminate at 175°C, necessitating a low processing temperature dielectric coating. A polymer nanocomposite can be prepared at temperatures below the HTS cable delamination temperature, mitigating this issue. The proposed polymer nanocomposite was composed of polymethyl methacrylate (PMMA) and impregnated with silicon dioxide (SiO2) to improve the dielectric performance of the base polymer. Dielectric breakdown testing shows a significant increase in the dielectric strength of PMMA/SiO2 composites at cryogenic temperatures when compared to room temperature testing. The increase is most significant across higher filler concentrations where the dielectric strength more than triples over room temperature values from 60-90 kV/mm to 290 kV/mm. The impact a colder testing environment has on dielectric performance makes PMMA/SiO2 nanocomposites a promising low temperature processing dielectric for adoption into HTS cable systems.
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U2 - 10.1109/NMDC50713.2021.9677481
DO - 10.1109/NMDC50713.2021.9677481
M3 - Conference contribution
AN - SCOPUS:85125322942
T3 - 2021 IEEE 16th Nanotechnology Materials and Devices Conference, NMDC 2021
BT - 2021 IEEE 16th Nanotechnology Materials and Devices Conference, NMDC 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 16th IEEE Nanotechnology Materials and Devices Conference, NMDC 2021
Y2 - 12 December 2021 through 15 December 2021
ER -