TY - GEN
T1 - Thermal cycling study of prospective fuel-cell sealants from silica-sand/alumina composites
AU - Hidayat, Nurul
AU - Baqiya, Malik Anjelh
AU - Triwikantoro,
AU - Pratapa, Suminar
N1 - Publisher Copyright:
© 2020 Author(s).
PY - 2020/8/18
Y1 - 2020/8/18
N2 - As excellent alternatives for cleaner energy production evaluated against conventional nonrenewable energy sources, fuel-cells have now been commercially viable. However, efforts to improve their efficiency are always important. By high temperature and sandwich model of fuel-cells, sealing materials play an important role to prevent air leakage and entirely lock the hydrogen inside to achieve high efficiency. In this study, we reported the phase stability of purified silica-sand/alumina composites under heat cycling treatment within the fuel-cells working temperatures. The composites, containing commercial Al2O3 and purified SiO2 from Indonesian silica sand, were prepared using a simple solid-state reaction approach. X-ray diffraction data collection and evaluation were performed to check the phase formation of the compact ceramic composites. Herein, we focused on the composites' phase stability under heat treatment for several times. As a result, the phase content in the composites remained unchanged. This stable characteristic also applied to the density-porosity behaviors and the coefficient of thermal expansion (CTE) of the composites. In addition, the CTE of the composites was evaluated theoretically and experimentally. Both results agreed that the CTE values of the composites are suitable for sealing materials. From the crystalline structures, physical and thermomechanical stabilities, it is therefore concluded that the silica-sand/alumina composites can be proposed as fuel-cell seal materials.
AB - As excellent alternatives for cleaner energy production evaluated against conventional nonrenewable energy sources, fuel-cells have now been commercially viable. However, efforts to improve their efficiency are always important. By high temperature and sandwich model of fuel-cells, sealing materials play an important role to prevent air leakage and entirely lock the hydrogen inside to achieve high efficiency. In this study, we reported the phase stability of purified silica-sand/alumina composites under heat cycling treatment within the fuel-cells working temperatures. The composites, containing commercial Al2O3 and purified SiO2 from Indonesian silica sand, were prepared using a simple solid-state reaction approach. X-ray diffraction data collection and evaluation were performed to check the phase formation of the compact ceramic composites. Herein, we focused on the composites' phase stability under heat treatment for several times. As a result, the phase content in the composites remained unchanged. This stable characteristic also applied to the density-porosity behaviors and the coefficient of thermal expansion (CTE) of the composites. In addition, the CTE of the composites was evaluated theoretically and experimentally. Both results agreed that the CTE values of the composites are suitable for sealing materials. From the crystalline structures, physical and thermomechanical stabilities, it is therefore concluded that the silica-sand/alumina composites can be proposed as fuel-cell seal materials.
UR - http://www.scopus.com/inward/record.url?scp=85091566123&partnerID=8YFLogxK
U2 - 10.1063/5.0015633
DO - 10.1063/5.0015633
M3 - Conference contribution
AN - SCOPUS:85091566123
T3 - AIP Conference Proceedings
BT - International Conference on Electromagnetism, Rock Magnetism and Magnetic Material, ICE-R3M 2019
A2 - Sunaryono, Sunaryono
A2 - Hirt, Ann Marie
A2 - Herrin, Jason Scott
A2 - Muztaza, Nordiana Mohd
A2 - Diantoro, Markus
A2 - Bijaksana, Satria
PB - American Institute of Physics Inc.
T2 - 2019 International Conference on Electromagnetism, Rock Magnetism and Magnetic Material, ICE-R3M 2019
Y2 - 18 September 2019 through 19 September 2019
ER -